diff --git a/chai/chai-3.2.0-tests.ts b/chai/chai-3.2.0-tests.ts
new file mode 100644
index 000000000..9b646b152
--- /dev/null
+++ b/chai/chai-3.2.0-tests.ts
@@ -0,0 +1,1948 @@
+/// <reference path="chai.d.ts" />
+import chai = require('chai');
+
+// ReSharper disable WrongExpressionStatement
+
+var expect = chai.expect;
+var assert = chai.assert;
+var should = chai.should();
+declare var err: Function;
+
+function chaiVersion() {
+    expect(chai).to.have.property('version');
+    (<Object><{}>chai).should.have.property('version');
+}
+
+function assertion() {
+    expect('test').to.be.a('string');
+    'test'.should.be.a('string');
+    expect('foo').to.equal('foo');
+    'foo'.should.equal('foo');
+    should.equal('foo', 'foo');
+}
+
+function fail() {
+    err(() => {
+        should.fail('foo', 'bar');
+    }, 'expected fail to throw an AssertionError');
+    err(() => {
+        should.fail('foo', 'bar', 'should fail');
+    }, 'expected fail to throw an AssertionError');
+    err(() => {
+        should.fail('foo', 'bar', 'should fail', 'equal');
+    }, 'expected fail to throw an AssertionError');
+
+    err(() => {
+        expect.fail('foo', 'bar');
+    }, 'expected fail to throw an AssertionError');
+    err(() => {
+        expect.fail('foo', 'bar', 'should fail');
+    }, 'expected fail to throw an AssertionError');
+    err(() => {
+        expect.fail('foo', 'bar', 'should fail', 'equal');
+    }, 'expected fail to throw an AssertionError');
+}
+
+// ReSharper disable once InconsistentNaming
+function _true() {
+    expect(true).to.be.true;
+    true.should.be.true;
+    expect(false).to.not.be.true;
+    false.should.not.be.true;
+    expect(1).to.not.be.true;
+    (1).should.not.be.true;
+
+    err(() => {
+        expect('test').to.be.true;
+        'test'.should.be.true;
+    }, 'expected \'test\' to be true');
+}
+
+function ok() {
+    expect(true).to.be.ok;
+    true.should.be.ok;
+    expect(false).to.not.be.ok;
+    false.should.not.be.ok;
+    expect(1).to.be.ok;
+    (1).should.be.ok;
+    expect(0).to.not.be.ok;
+    (0).should.not.be.ok;
+
+    err(() => {
+        expect('').to.be.ok;
+        ''.should.be.ok;
+    }, 'expected \'\' to be truthy');
+
+    err(() => {
+        expect('test').to.not.be.ok;
+        'test'.should.not.be.ok;
+    }, 'expected \'test\' to be falsy');
+}
+
+function _false() {
+    expect(false).to.be.false;
+    false.should.be.false;
+    expect(true).to.not.be.false;
+    true.should.not.be.false;
+    expect(0).to.not.be.false;
+    (0).should.not.be.false;
+
+    err(() => {
+        expect('').to.be.false;
+        ''.should.be.false;
+    }, 'expected \'\' to be false');
+}
+
+function _null() {
+    expect(null).to.be.null;
+    should.equal(null, null);
+    expect(false).to.not.be.null;
+    false.should.not.be.null;
+
+    err(() => {
+        expect('').to.be.null;
+        ''.should.be.null;
+    }, 'expected \'\' to be null');
+}
+
+function _undefined() {
+    expect(undefined).to.be.undefined;
+    should.equal(undefined, undefined);
+    expect(null).to.not.be.undefined;
+    should.not.equal(null, undefined);
+
+    err(() => {
+        expect('').to.be.undefined;
+        ''.should.be.undefined;
+    }, 'expected \'\' to be undefined');
+}
+
+function _NaN() {
+    expect(NaN).to.be.NaN;
+    expect(12).to.be.not.NaN;
+    expect("NaN").to.be.not.NaN;
+    (NaN).should.be.NaN;
+    (12).should.be.not.NaN;
+    ("NaN").should.be.not.NaN;
+}
+
+function exist() {
+    var foo = 'bar';
+    expect(foo).to.exist;
+    should.exist(foo);
+    expect(void (0)).to.not.exist;
+    should.not.exist(void (0));
+}
+
+function argumentsTest() {
+    var args = arguments;
+    expect(args).to.be.arguments;
+    args.should.be.arguments;
+    expect([]).to.not.be.arguments;
+    [].should.not.be.arguments;
+    expect(args).to.be.an('arguments').and.be.arguments;
+    args.should.be.an('arguments').and.be.arguments;
+    expect([]).to.be.an('array').and.not.be.Arguments;
+    [].should.be.an('array').and.not.be.Arguments;
+}
+
+function equal() {
+    expect(undefined).to.equal(void (0));
+    should.equal(undefined, void (0));
+}
+
+function _typeof() {
+    expect('test').to.be.a('string');
+    'test'.should.be.a('string');
+
+    err(() => {
+        expect('test').to.not.be.a('string');
+        'test'.should.not.be.a('string');
+    }, 'expected \'test\' not to be a string');
+
+    expect(arguments).to.be.an('arguments');
+    arguments.should.be.an('arguments');
+
+    expect(5).to.be.a('number');
+    (5).should.be.a('number');
+
+    expect(new Number(1)).to.be.a('number');
+    (new Number(1)).should.be.a('number');
+    expect(Number(1)).to.be.a('number');
+    Number(1).should.be.a('number');
+    expect(true).to.be.a('boolean');
+    true.should.be.a('boolean');
+    expect(new Array()).to.be.a('array');
+    (new Array()).should.be.a('array');
+    expect(new Object()).to.be.a('object');
+    (new Object()).should.be.a('object');
+    expect({}).to.be.a('object');
+    ({}).should.be.a('object');
+    expect([]).to.be.a('array');
+    [].should.be.a('array');
+    expect(() => { }).to.be.a('function');
+    (() => { }).should.be.a('function');
+    expect(null).to.be.a('null');
+    // N.B. previous line has no should equivalent
+
+    err(() => {
+        expect(5).to.not.be.a('number', 'blah');
+        (5).should.not.be.a('number', 'blah');
+    }, 'blah: expected 5 not to be a number');
+}
+
+class Foo { }
+function _instanceof() {
+    expect(new Foo()).to.be.an.instanceof(Foo);
+    (new Foo()).should.be.an.instanceof(Foo);
+
+    err(() => {
+        expect(3).to.an.instanceof(Foo, 'blah');
+        (3).should.an.instanceof(Foo, 'blah');
+    }, 'blah: expected 3 to be an instance of Foo');
+}
+
+function within() {
+    expect(5).to.be.within(5, 10);
+    (5).should.be.within(5, 10);
+    expect(5).to.be.within(3, 6);
+    (5).should.be.within(3, 6);
+    expect(5).to.be.within(3, 5);
+    (5).should.be.within(3, 5);
+    expect(5).to.not.be.within(1, 3);
+    (5).should.not.be.within(1, 3);
+    expect('foo').to.have.length.within(2, 4);
+    'foo'.should.have.length.within(2, 4);
+    expect([1, 2, 3]).to.have.length.within(2, 4);
+    [1, 2, 3].should.have.length.within(2, 4);
+
+    err(() => {
+        expect(5).to.not.be.within(4, 6, 'blah');
+        (5).should.not.be.within(4, 6, 'blah');
+    }, 'blah: expected 5 to not be within 4..6', 'blah');
+
+    err(() => {
+        expect(10).to.be.within(50, 100, 'blah');
+        (10).should.be.within(50, 100, 'blah');
+    }, 'blah: expected 10 to be within 50..100');
+
+    err(() => {
+        expect('foo').to.have.length.within(5, 7, 'blah');
+        'foo'.should.have.length.within(5, 7, 'blah');
+    }, 'blah: expected \'foo\' to have a length within 5..7');
+
+    err(() => {
+        expect([1, 2, 3]).to.have.length.within(5, 7, 'blah');
+        [1, 2, 3].should.have.length.within(5, 7, 'blah');
+    }, 'blah: expected [ 1, 2, 3 ] to have a length within 5..7');
+}
+
+function above() {
+    expect(5).to.be.above(2);
+    (5).should.be.above(2);
+    expect(5).to.be.greaterThan(2);
+    (5).should.be.greaterThan(2);
+    expect(5).to.not.be.above(5);
+    (5).should.not.be.above(5);
+    expect(5).to.not.be.above(6);
+    (5).should.not.be.above(6);
+    expect('foo').to.have.length.above(2);
+    'foo'.should.have.length.above(2);
+    expect([1, 2, 3]).to.have.length.above(2);
+    [1, 2, 3].should.have.length.above(2);
+
+    err(() => {
+        expect(5).to.be.above(6, 'blah');
+        (5).should.be.above(6, 'blah');
+    }, 'blah: expected 5 to be above 6', 'blah');
+
+    err(() => {
+        expect(10).to.not.be.above(6, 'blah');
+        (10).should.not.be.above(6, 'blah');
+    }, 'blah: expected 10 to be at most 6');
+
+    err(() => {
+        expect('foo').to.have.length.above(4, 'blah');
+        'foo'.should.have.length.above(4, 'blah');
+    }, 'blah: expected \'foo\' to have a length above 4 but got 3');
+
+    err(() => {
+        expect([1, 2, 3]).to.have.length.above(4, 'blah');
+        [1, 2, 3].should.have.length.above(4, 'blah');
+    }, 'blah: expected [ 1, 2, 3 ] to have a length above 4 but got 3');
+}
+
+function least() {
+    expect(5).to.be.at.least(2);
+    (5).should.be.at.least(2);
+    expect(5).to.be.at.least(5);
+    (5).should.be.at.least(5);
+    expect(5).to.not.be.at.least(6);
+    (5).should.not.be.at.least(6);
+    expect('foo').to.have.length.of.at.least(2);
+    'foo'.should.have.length.of.at.least(2);
+    expect([1, 2, 3]).to.have.length.of.at.least(2);
+    [1, 2, 3].should.have.length.of.at.least(2);
+
+    err(() => {
+        expect(5).to.be.at.least(6, 'blah');
+        (5).should.be.at.least(6, 'blah');
+    }, 'blah: expected 5 to be at least 6', 'blah');
+
+    err(() => {
+        expect(10).to.not.be.at.least(6, 'blah');
+        (10).should.not.be.at.least(6, 'blah');
+    }, 'blah: expected 10 to be below 6');
+
+    err(() => {
+        expect('foo').to.have.length.of.at.least(4, 'blah');
+        'foo'.should.have.length.of.at.least(4, 'blah');
+    }, 'blah: expected \'foo\' to have a length at least 4 but got 3');
+
+    err(() => {
+        expect([1, 2, 3]).to.have.length.of.at.least(4, 'blah');
+        [1, 2, 3].should.have.length.of.at.least(4, 'blah');
+    }, 'blah: expected [ 1, 2, 3 ] to have a length at least 4 but got 3');
+
+    err(() => {
+        expect([1, 2, 3, 4]).to.not.have.length.of.at.least(4, 'blah');
+        [1, 2, 3, 4].should.not.have.length.of.at.least(4, 'blah');
+    }, 'blah: expected [ 1, 2, 3, 4 ] to have a length below 4');
+}
+
+function below() {
+    expect(2).to.be.below(5);
+    (2).should.be.below(5);
+    expect(2).to.be.lessThan(5);
+    (2).should.be.lessThan(5);
+    expect(2).to.not.be.below(2);
+    (2).should.not.be.below(2);
+    expect(2).to.not.be.below(1);
+    (2).should.not.be.below(1);
+    expect('foo').to.have.length.below(4);
+    'foo'.should.have.length.below(4);
+    expect([1, 2, 3]).to.have.length.below(4);
+    [1, 2, 3].should.have.length.below(4);
+
+    err(() => {
+        expect(6).to.be.below(5, 'blah');
+        (6).should.be.below(5, 'blah');
+    }, 'blah: expected 6 to be below 5');
+
+    err(() => {
+        expect(6).to.not.be.below(10, 'blah');
+        (6).should.not.be.below(10, 'blah');
+    }, 'blah: expected 6 to be at least 10');
+
+    err(() => {
+        expect('foo').to.have.length.below(2, 'blah');
+        'foo'.should.have.length.below(2, 'blah');
+    }, 'blah: expected \'foo\' to have a length below 2 but got 3');
+
+    err(() => {
+        expect([1, 2, 3]).to.have.length.below(2, 'blah');
+        [1, 2, 3].should.have.length.below(2, 'blah');
+    }, 'blah: expected [ 1, 2, 3 ] to have a length below 2 but got 3');
+}
+
+function most() {
+    expect(2).to.be.at.most(5);
+    (2).should.be.at.most(5);
+    expect(2).to.be.at.most(2);
+    (2).should.be.at.most(2);
+    expect(2).to.not.be.at.most(1);
+    (2).should.not.be.at.most(1);
+    expect(2).to.not.be.at.most(1);
+    (2).should.not.be.at.most(1);
+    expect('foo').to.have.length.of.at.most(4);
+    'foo'.should.have.length.of.at.most(4);
+    expect([1, 2, 3]).to.have.length.of.at.most(4);
+    [1, 2, 3].should.have.length.of.at.most(4);
+
+    err(() => {
+        expect(6).to.be.at.most(5, 'blah');
+        (6).should.be.at.most(5, 'blah');
+    }, 'blah: expected 6 to be at most 5');
+
+    err(() => {
+        expect(6).to.not.be.at.most(10, 'blah');
+        (6).should.not.be.at.most(10, 'blah');
+    }, 'blah: expected 6 to be above 10');
+
+    err(() => {
+        expect('foo').to.have.length.of.at.most(2, 'blah');
+        'foo'.should.have.length.of.at.most(2, 'blah');
+    }, 'blah: expected \'foo\' to have a length at most 2 but got 3');
+
+    err(() => {
+        expect([1, 2, 3]).to.have.length.of.at.most(2, 'blah');
+        [1, 2, 3].should.have.length.of.at.most(2, 'blah');
+    }, 'blah: expected [ 1, 2, 3 ] to have a length at most 2 but got 3');
+
+    err(() => {
+        expect([1, 2]).to.not.have.length.of.at.most(2, 'blah');
+        [1, 2].should.not.have.length.of.at.most(2, 'blah');
+    }, 'blah: expected [ 1, 2 ] to have a length above 2');
+}
+
+function match() {
+    expect('foobar').to.match(/^foo/);
+    'foobar'.should.match(/^foo/);
+    expect('foobar').to.not.match(/^bar/);
+    'foobar'.should.not.match(/^bar/);
+
+    expect('foobar').matches(/^foo/);
+    'foobar'.should.not.matches(/^bar/);
+
+    err(() => {
+        expect('foobar').to.match(/^bar/i, 'blah');
+        'foobar'.should.match(/^bar/i, 'blah');
+    }, 'blah: expected \'foobar\' to match /^bar/i');
+
+    err(() => {
+        expect('foobar').to.not.match(/^foo/i, 'blah');
+        'foobar'.should.not.match(/^foo/i, 'blah');
+    }, 'blah: expected \'foobar\' not to match /^foo/i');
+}
+
+function length2() {
+    expect('test').to.have.length(4);
+    'test'.should.have.length(4);
+    expect('test').to.not.have.length(3);
+    'test'.should.not.have.length(3);
+    expect([1, 2, 3]).to.have.length(3);
+    [1, 2, 3].should.have.length(3);
+
+    err(() => {
+        expect(4).to.have.length(3, 'blah');
+        (4).should.have.length(3, 'blah');
+    }, 'blah: expected 4 to have a property \'length\'');
+
+    err(() => {
+        expect('asd').to.not.have.length(3, 'blah');
+        'asd'.should.not.have.length(3, 'blah');
+    }, 'blah: expected \'asd\' to not have a length of 3');
+}
+
+function eql() {
+    expect('test').to.eql('test');
+    'test'.should.eql('test');
+    expect({ foo: 'bar' }).to.eql({ foo: 'bar' });
+    ({ foo: 'bar' }).should.eql({ foo: 'bar' });
+    expect(1).to.eql(1);
+    (1).should.eql(1);
+    expect('4').to.not.eql(4);
+    '4'.should.not.eql(4);
+
+    err(() => {
+        expect(4).to.eql(3, 'blah');
+        (4).should.eql(3, 'blah');
+    }, 'blah: expected 4 to deeply equal 3');
+}
+
+class Buffer {
+    constructor(arr: number[]) {
+    }
+}
+function buffer() {
+    expect(new Buffer([1])).to.eql(new Buffer([1]));
+    (new Buffer([1])).should.eql(new Buffer([1]));
+
+    err(() => {
+        expect(new Buffer([0])).to.eql(new Buffer([1]));
+        (new Buffer([0])).should.eql(new Buffer([1]));
+    }, 'expected <Buffer 00> to deeply equal <Buffer 01>');
+}
+
+function equal2() {
+    expect('test').to.equal('test');
+    'test'.should.equal('test');
+    should.equal('test', 'test');
+    expect(1).to.equal(1);
+    (1).should.equal(1);
+    should.equal(1, 1);
+
+    err(() => {
+        expect(4).to.equal(3, 'blah');
+        (4).should.equal(3, 'blah');
+        should.equal(4, 3, 'blah');
+    }, 'blah: expected 4 to equal 3');
+
+    err(() => {
+        expect('4').to.equal(4, 'blah');
+        '4'.should.equal(4, 'blah');
+        should.equal(4, 4, 'blah');
+    }, 'blah: expected \'4\' to equal 4');
+}
+
+function deepEqual() {
+    expect({ foo: 'bar' }).to.deep.equal({ foo: 'bar' });
+    ({ foo: 'bar' }).should.deep.equal({ foo: 'bar' });
+    expect({ foo: 'bar' }).not.to.deep.equal({ foo: 'baz' });
+}
+
+function deepEqual2() {
+    expect(/a/).to.deep.equal(/a/);
+    /a/.should.deep.equal(/a/);
+    expect(/a/).not.to.deep.equal(/b/);
+    expect(/a/).not.to.deep.equal({});
+    expect(/a/g).to.deep.equal(/a/g);
+    /a/g.should.deep.equal(/a/g);
+    expect(/a/g).not.to.deep.equal(/b/g);
+    expect(/a/i).to.deep.equal(/a/i);
+    /a/i.should.deep.equal(/a/i);
+    expect(/a/i).not.to.deep.equal(/b/i);
+    expect(/a/m).to.deep.equal(/a/m);
+    /a/m.should.deep.equal(/a/m);
+    expect(/a/m).not.to.deep.equal(/b/m);
+}
+
+// ReSharper disable once InconsistentNaming
+function deepEqual3() {
+    var a = new Date(1, 2, 3);
+    var b = new Date(4, 5, 6);
+    expect(a).to.deep.equal(a);
+    a.should.deep.equal(a);
+    expect(a).not.to.deep.equal(b);
+    a.should.not.deep.equal(b);
+    expect(a).not.to.deep.equal({});
+    a.should.not.deep.equal({});
+}
+
+function deepInclude() {
+    expect(['foo', 'bar']).to.deep.include(['bar', 'foo']);
+    ['foo', 'bar'].should.deep.include(['bar', 'foo']);
+    expect(['foo', 'bar']).not.to.deep.equal(['foo', 'baz']);
+    ['foo', 'bar'].should.not.deep.equal(['foo', 'baz']);
+}
+
+class FakeArgs {
+    length: number;
+}
+
+function empty() {
+    FakeArgs.prototype.length = 0;
+
+    expect('').to.be.empty;
+
+    ''.should.be.empty;
+    expect('foo').not.to.be.empty;
+    'foo'.should.not.be.empty;
+    expect([]).to.be.empty;
+    [].should.be.empty;
+    expect(['foo']).not.to.be.empty;
+    ['foo'].should.not.be.empty;
+    expect(new FakeArgs).to.be.empty;
+    (new FakeArgs).should.be.empty;
+    expect({ arguments: 0 }).not.to.be.empty;
+    ({ arguments: 0 }).should.not.be.empty;
+    expect({}).to.be.empty;
+    ({}).should.be.empty;
+    expect({ foo: 'bar' }).not.to.be.empty;
+    ({ foo: 'bar' }).should.not.be.empty;
+
+    err(() => {
+        expect('').not.to.be.empty;
+        ''.should.not.be.empty;
+    }, 'expected \'\' not to be empty');
+
+    err(() => {
+        expect('foo').to.be.empty;
+        'foo'.should.be.empty;
+        'foo'.should.be.empty;
+    }, 'expected \'foo\' to be empty');
+
+    err(() => {
+        expect([]).not.to.be.empty;
+        [].should.not.be.empty;
+    }, 'expected [] not to be empty');
+
+    err(() => {
+        expect(['foo']).to.be.empty;
+        ['foo'].should.be.empty;
+    }, 'expected [ \'foo\' ] to be empty');
+
+    err(() => {
+        expect(new FakeArgs).not.to.be.empty;
+        (new FakeArgs).should.not.be.empty;
+    }, 'expected { length: 0 } not to be empty');
+
+    err(() => {
+        expect({ arguments: 0 }).to.be.empty;
+        ({ arguments: 0 }).should.be.empty;
+    }, 'expected { arguments: 0 } to be empty');
+
+    err(() => {
+        expect({}).not.to.be.empty;
+        ({}).should.not.be.empty;
+    }, 'expected {} not to be empty');
+
+    err(() => {
+        expect({ foo: 'bar' }).to.be.empty;
+        ({ foo: 'bar' }).should.be.empty;
+    }, 'expected { foo: \'bar\' } to be empty');
+}
+
+function property() {
+    expect('test').to.have.property('length');
+    'test'.should.have.property('length');
+    expect(4).to.not.have.property('length');
+    (4).should.not.have.property('length');
+
+    expect({ 'foo.bar': 'baz' })
+        .to.have.property('foo.bar');
+    ({ 'foo.bar': 'baz' }).should.have.property('foo.bar');
+    expect({ foo: { bar: 'baz' } })
+        .to.not.have.property('foo.bar');
+    ({ foo: { bar: 'baz' } }).should.not.have.property('foo.bar');
+
+    err(() => {
+        expect('asd').to.have.property('foo');
+        'asd'.should.have.property('foo');
+    }, 'expected \'asd\' to have a property \'foo\'');
+    err(() => {
+        expect({ foo: { bar: 'baz' } })
+            .to.have.property('foo.bar');
+        ({ foo: { bar: 'baz' } }).should.have.property('foo.bar');
+    }, 'expected { foo: { bar: \'baz\' } } to have a property \'foo.bar\'');
+}
+
+function deepProperty() {
+    expect({ 'foo.bar': 'baz' })
+        .to.not.have.deep.property('foo.bar');
+    ({ 'foo.bar': 'baz' }).should
+        .not.have.deep.property('foo.bar');
+    expect({ foo: { bar: 'baz' } })
+        .to.have.deep.property('foo.bar');
+    ({ foo: { bar: 'baz' } }).should
+        .have.deep.property('foo.bar');
+
+    err(() => {
+        expect({ 'foo.bar': 'baz' })
+            .to.have.deep.property('foo.bar');
+        ({ 'foo.bar': 'baz' }).should
+            .have.deep.property('foo.bar');
+    }, 'expected { \'foo.bar\': \'baz\' } to have a deep property \'foo.bar\'');
+}
+
+function property2() {
+    expect('test').to.have.property('length', 4);
+    'test'.should.have.property('length', 4);
+    expect('asd').to.have.property('constructor', String);
+    'asd'.should.have.property('constructor', String);
+
+    err(() => {
+        expect('asd').to.have.property('length', 4, 'blah');
+        'asd'.should.have.property('length', 4, 'blah');
+    }, 'blah: expected \'asd\' to have a property \'length\' of 4, but got 3');
+
+    err(() => {
+        expect('asd').to.not.have.property('length', 3, 'blah');
+        'asd'.should.not.have.property('length', 3, 'blah');
+    }, 'blah: expected \'asd\' to not have a property \'length\' of 3');
+
+    err(() => {
+        expect('asd').to.not.have.property('foo', 3, 'blah');
+        'asd'.should.not.have.property('foo', 3, 'blah');
+    }, 'blah: \'asd\' has no property \'foo\'');
+
+    err(() => {
+        expect('asd').to.have.property('constructor', Number, 'blah');
+        'asd'.should.have.property('constructor', Number, 'blah');
+    }, 'blah: expected \'asd\' to have a property \'constructor\' of [Function: Number], but got [Function: String]');
+}
+
+function deepProperty2() {
+    expect({ foo: { bar: 'baz' } })
+        .to.have.deep.property('foo.bar', 'baz');
+    ({ foo: { bar: 'baz' } }).should
+        .have.deep.property('foo.bar', 'baz');
+
+    err(() => {
+        expect({ foo: { bar: 'baz' } })
+            .to.have.deep.property('foo.bar', 'quux', 'blah');
+        ({ foo: { bar: 'baz' } }).should
+            .have.deep.property('foo.bar', 'quux', 'blah');
+    }, 'blah: expected { foo: { bar: \'baz\' } } to have a deep property \'foo.bar\' of \'quux\', but got \'baz\'');
+    err(() => {
+        expect({ foo: { bar: 'baz' } })
+            .to.not.have.deep.property('foo.bar', 'baz', 'blah');
+        ({ foo: { bar: 'baz' } }).should
+            .not.have.deep.property('foo.bar', 'baz', 'blah');
+    }, 'blah: expected { foo: { bar: \'baz\' } } to not have a deep property \'foo.bar\' of \'baz\'');
+    err(() => {
+        expect({ foo: 5 })
+            .to.not.have.deep.property('foo.bar', 'baz', 'blah');
+        ({ foo: 5 }).should
+            .not.have.deep.property('foo.bar', 'baz', 'blah');
+    }, 'blah: { foo: 5 } has no deep property \'foo.bar\'');
+}
+
+function ownProperty() {
+    expect('test').to.have.ownProperty('length');
+    'test'.should.have.ownProperty('length');
+    expect('test').to.haveOwnProperty('length');
+    'test'.should.haveOwnProperty('length');
+    expect({ length: 12 }).to.have.ownProperty('length');
+    ({ length: 12 }).should.have.ownProperty('length');
+
+    err(() => {
+        expect({ length: 12 }).to.not.have.ownProperty('length', 'blah');
+        ({ length: 12 }).should.not.have.ownProperty('length', 'blah');
+    }, 'blah: expected { length: 12 } to not have own property \'length\'');
+}
+
+function ownPropertyDescriptor() {
+    expect('test').to.have.ownPropertyDescriptor('length');
+    expect('test').to.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 4 });
+    expect('test').not.to.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 3 });
+    expect('test').to.haveOwnPropertyDescriptor('length').to.have.property('enumerable', false);
+    expect('test').to.haveOwnPropertyDescriptor('length').to.contain.keys('value');
+
+    'test'.should.have.ownPropertyDescriptor('length');
+    'test'.should.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 4 });
+    'test'.should.not.have.ownPropertyDescriptor('length', { enumerable: false, configurable: false, writable: false, value: 3 });
+    'test'.should.haveOwnPropertyDescriptor('length').to.have.property('enumerable', false);
+    'test'.should.haveOwnPropertyDescriptor('length').to.contain.keys('value');
+}
+
+function string() {
+    expect('foobar').to.have.string('bar');
+    'foobar'.should.have.string('bar');
+    expect('foobar').to.have.string('foo');
+    'foobar'.should.have.string('foo');
+    expect('foobar').to.not.have.string('baz');
+    'foobar'.should.not.have.string('baz');
+
+    err(() => {
+        expect(3).to.have.string('baz');
+        (3).should.have.string('baz');
+    }, 'expected 3 to be a string');
+
+    err(() => {
+        expect('foobar').to.have.string('baz', 'blah');
+        'foobar'.should.have.string('baz', 'blah');
+    }, 'blah: expected \'foobar\' to contain \'baz\'');
+
+    err(() => {
+        expect('foobar').to.not.have.string('bar', 'blah');
+        'foobar'.should.not.have.string('bar', 'blah');
+    }, 'blah: expected \'foobar\' to not contain \'bar\'');
+}
+
+function include() {
+    expect(['foo', 'bar']).to.include('foo');
+    ['foo', 'bar'].should.include('foo');
+    expect(['foo', 'bar']).to.include('foo');
+    ['foo', 'bar'].should.include('foo');
+    expect(['foo', 'bar']).to.include('bar');
+    ['foo', 'bar'].should.include('bar');
+    expect([1, 2]).to.include(1);
+    [1, 2].should.include(1);
+    expect(['foo', 'bar']).to.not.include('baz');
+    ['foo', 'bar'].should.not.include('baz');
+    expect(['foo', 'bar']).to.not.include(1);
+    ['foo', 'bar'].should.not.include(1);
+    // alias
+
+    expect(['foo', 'bar']).includes('foo');
+    ['foo', 'bar'].should.includes('foo');
+
+    err(() => {
+        expect(['foo']).to.include('bar', 'blah');
+        ['foo'].should.include('bar', 'blah');
+    }, 'blah: expected [ \'foo\' ] to include \'bar\'');
+
+    err(() => {
+        expect(['bar', 'foo']).to.not.include('foo', 'blah');
+        ['bar', 'foo'].should.not.include('foo', 'blah');
+    }, 'blah: expected [ \'bar\', \'foo\' ] to not include \'foo\'');
+}
+
+function keys() {
+    expect({ foo: 1 }).to.have.keys(['foo']);
+    ({ foo: 1 }).should.have.keys(['foo']);
+    expect({ foo: 1, bar: 2 }).to.have.keys(['foo', 'bar']);
+    ({ foo: 1, bar: 2 }).should.have.keys(['foo', 'bar']);
+    expect({ foo: 1, bar: 2 }).to.have.keys('foo', 'bar');
+    ({ foo: 1, bar: 2 }).should.have.keys('foo', 'bar');
+    expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('foo', 'bar');
+    ({ foo: 1, bar: 2, baz: 3 }).should.contain.keys('foo', 'bar');
+    expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('bar', 'foo');
+    ({ foo: 1, bar: 2, baz: 3 }).should.contain.keys('bar', 'foo');
+    expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('baz');
+    ({ foo: 1, bar: 2, baz: 3 }).should.contain.keys('baz');
+    // alias
+
+    expect({ foo: 1, bar: 2, baz: 3 }).contains.keys('baz');
+
+    expect({ foo: 1, bar: 2 }).to.have.all.keys(['foo', 'bar']);
+    expect({ foo: 1, bar: 2 }).to.have.any.keys(['foo', 'bar']);
+    ({ foo: 1, bar: 2, baz: 3 }).should.contain.all.keys('baz');
+    ({ foo: 1, bar: 2, baz: 3 }).should.contain.any.keys('baz');
+
+    expect({ foo: 1, bar: 2 }).to.contain.keys('foo');
+    ({ foo: 1, bar: 2 }).should.contain.keys('foo');
+    expect({ foo: 1, bar: 2 }).to.contain.keys('bar', 'foo');
+    ({ foo: 1, bar: 2 }).should.contain.keys('bar', 'foo');
+    expect({ foo: 1, bar: 2 }).to.contain.keys(['foo']);
+    ({ foo: 1, bar: 2 }).should.contain.keys(['foo']);
+    expect({ foo: 1, bar: 2 }).to.contain.keys(['bar']);
+    ({ foo: 1, bar: 2 }).should.contain.keys(['bar']);
+    expect({ foo: 1, bar: 2 }).to.contain.keys(['bar', 'foo']);
+    ({ foo: 1, bar: 2 }).should.contain.keys(['bar', 'foo']);
+
+    expect({ foo: 1, bar: 2 }).to.not.have.keys('baz');
+    ({ foo: 1, bar: 2 }).should.not.have.keys('baz');
+    expect({ foo: 1, bar: 2 }).to.not.have.keys('foo', 'baz');
+    ({ foo: 1, bar: 2 }).should.not.have.keys('foo', 'baz');
+    expect({ foo: 1, bar: 2 }).to.not.contain.keys('baz');
+    ({ foo: 1, bar: 2 }).should.not.contain.keys('baz');
+    expect({ foo: 1, bar: 2 }).to.not.contain.keys('foo', 'baz');
+    ({ foo: 1, bar: 2 }).should.not.contain.keys('foo', 'baz');
+    expect({ foo: 1, bar: 2 }).to.not.contain.keys('baz', 'foo');
+    ({ foo: 1, bar: 2 }).should.not.contain.keys('baz', 'foo');
+
+    err(() => {
+        expect({ foo: 1 }).to.have.keys();
+        ({ foo: 1 }).should.have.keys();
+    }, 'keys required');
+
+    err(() => {
+        expect({ foo: 1 }).to.have.keys([]);
+        ({ foo: 1 }).should.have.keys([]);
+    }, 'keys required');
+
+    err(() => {
+        expect({ foo: 1 }).to.not.have.keys([]);
+        ({ foo: 1 }).should.not.have.keys([]);
+    }, 'keys required');
+
+    err(() => {
+        expect({ foo: 1 }).to.contain.keys([]);
+        ({ foo: 1 }).should.contain.keys([]);
+    }, 'keys required');
+
+    err(() => {
+        expect({ foo: 1 }).to.have.keys(['bar']);
+        ({ foo: 1 }).should.have.keys(['bar']);
+    }, 'expected { foo: 1 } to have key \'bar\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.have.keys(['bar', 'baz']);
+        ({ foo: 1 }).should.have.keys(['bar', 'baz']);
+    }, 'expected { foo: 1 } to have keys \'bar\', and \'baz\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.have.keys(['foo', 'bar', 'baz']);
+        ({ foo: 1 }).should.have.keys(['foo', 'bar', 'baz']);
+    }, 'expected { foo: 1 } to have keys \'foo\', \'bar\', and \'baz\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.not.have.keys(['foo']);
+        ({ foo: 1 }).should.not.have.keys(['foo']);
+    }, 'expected { foo: 1 } to not have key \'foo\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.not.have.keys(['foo']);
+        ({ foo: 1 }).should.not.have.keys(['foo']);
+    }, 'expected { foo: 1 } to not have key \'foo\'');
+
+    err(() => {
+        expect({ foo: 1, bar: 2 }).to.not.have.keys(['foo', 'bar']);
+        ({ foo: 1, bar: 2 }).should.not.have.keys(['foo', 'bar']);
+    }, 'expected { foo: 1, bar: 2 } to not have keys \'foo\', and \'bar\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.not.contain.keys(['foo']);
+        ({ foo: 1 }).should.not.contain.keys(['foo']);
+    }, 'expected { foo: 1 } to not contain key \'foo\'');
+
+    err(() => {
+        expect({ foo: 1 }).to.contain.keys('foo', 'bar');
+        ({ foo: 1 }).should.contain.keys('foo', 'bar');
+    }, 'expected { foo: 1 } to contain keys \'foo\', and \'bar\'');
+}
+
+function chaining() {
+    var tea = { name: 'chai', extras: ['milk', 'sugar', 'smile'] };
+    expect(tea).to.have.property('extras').with.lengthOf(3);
+    tea.should.have.property('extras').with.lengthOf(3);
+
+    err(() => {
+        expect(tea).to.have.property('extras').with.lengthOf(4);
+        tea.should.have.property('extras').with.lengthOf(4);
+    }, 'expected [ \'milk\', \'sugar\', \'smile\' ] to have a length of 4 but got 3');
+
+    expect(tea).to.be.a('object').and.have.property('name', 'chai');
+    tea.should.be.a('object').and.have.property('name', 'chai');
+}
+
+function exxtensible() {
+    expect({}).to.be.extensible;
+    expect(Object.preventExtensions({})).to.be.not.extensible;
+    ({}).should.be.extensible;
+    Object.preventExtensions({}).should.not.be.extensible;
+}
+function sealed() {
+    expect({}).to.be.not.sealed;
+    expect(Object.seal({})).to.be.sealed;
+    ({}).should.be.not.sealed;
+    Object.seal({}).should.be.sealed;
+}
+
+function frozen() {
+    expect({}).to.be.not.frozen;
+    expect(Object.freeze({})).to.be.frozen;
+    ({}).should.be.not.frozen;
+    Object.freeze({}).should.be.frozen;
+}
+
+
+class PoorlyConstructedError { }
+function _throw() {
+    // See GH-45: some poorly-constructed custom errors don't have useful names
+    // on either their constructor or their constructor prototype, but instead
+    // only set the name inside the constructor itself.
+    PoorlyConstructedError.prototype = Object.create(Error.prototype);
+
+    var specificError = new RangeError('boo');
+
+    var goodFn = () => { }
+        , badFn = () => { throw new Error('testing'); }
+        , refErrFn = () => { throw new ReferenceError('hello'); }
+        , ickyErrFn = () => { throw new PoorlyConstructedError(); }
+        , specificErrFn = () => { throw specificError; };
+
+    expect(goodFn).to.not.throw();
+    goodFn.should.not.throw();
+    should.not.throw(goodFn);
+    expect(goodFn).to.not.throw(Error);
+    goodFn.should.not.throw(Error);
+    should.not.throw(goodFn, Error);
+    expect(goodFn).to.not.throw(specificError);
+    goodFn.should.not.throw(specificError);
+    should.not.throw(goodFn, specificError);
+
+    expect(badFn).to.throw();
+    badFn.should.throw();
+    should.throw(badFn);
+    expect(badFn).to.throw(Error);
+    badFn.should.throw(Error);
+    should.throw(badFn, Error);
+    expect(badFn).to.not.throw(ReferenceError);
+    badFn.should.not.throw(ReferenceError);
+    should.not.throw(badFn, ReferenceError);
+    expect(badFn).to.not.throw(specificError);
+    badFn.should.not.throw(specificError);
+    should.not.throw(badFn, specificError);
+
+    expect(refErrFn).to.throw();
+    refErrFn.should.throw();
+    should.throw(refErrFn);
+    expect(refErrFn).to.throw(ReferenceError);
+    refErrFn.should.throw(ReferenceError);
+    should.throw(refErrFn, ReferenceError);
+    expect(refErrFn).to.throw(Error);
+    refErrFn.should.throw(Error);
+    should.throw(refErrFn, Error);
+    expect(refErrFn).to.not.throw(TypeError);
+    refErrFn.should.not.throw(TypeError);
+    should.not.throw(refErrFn, TypeError);
+    expect(refErrFn).to.not.throw(specificError);
+    refErrFn.should.not.throw(specificError);
+    should.not.throw(refErrFn, specificError);
+
+    expect(ickyErrFn).to.throw();
+    ickyErrFn.should.throw();
+    should.throw(ickyErrFn);
+    expect(ickyErrFn).to.throw(PoorlyConstructedError);
+    ickyErrFn.should.throw(PoorlyConstructedError);
+    should.throw(ickyErrFn, PoorlyConstructedError);
+    expect(ickyErrFn).to.throw(Error);
+    ickyErrFn.should.throw(Error);
+    should.throw(ickyErrFn, Error);
+    expect(ickyErrFn).to.not.throw(specificError);
+    ickyErrFn.should.not.throw(specificError);
+    should.not.throw(ickyErrFn, specificError);
+    expect(specificErrFn).to.throw(specificError);
+    specificErrFn.should.throw(specificError);
+    should.throw(ickyErrFn, specificError);
+
+    expect(badFn).to.throw(/testing/);
+    badFn.should.throw(/testing/);
+    should.throw(badFn, /testing/);
+    expect(badFn).to.not.throw(/hello/);
+    badFn.should.not.throw(/hello/);
+    should.not.throw(badFn, /hello/);
+    expect(badFn).to.throw('testing');
+    badFn.should.throw('testing');
+    should.throw(badFn, 'testing');
+    expect(badFn).to.not.throw('hello');
+    badFn.should.not.throw('hello');
+    should.not.throw(badFn, 'hello');
+
+    expect(badFn).to.throw(Error, /testing/);
+    badFn.should.throw(Error, /testing/);
+    should.throw(badFn, Error, /testing/);
+    expect(badFn).to.throw(Error, 'testing');
+    badFn.should.throw(Error, 'testing');
+    should.throw(badFn, Error, 'testing');
+
+    err(() => {
+        expect(goodFn).to.throw();
+        goodFn.should.throw();
+        should.throw(goodFn);
+    }, 'expected [Function] to throw an error');
+
+    err(() => {
+        expect(goodFn).to.throw(ReferenceError);
+        goodFn.should.throw(ReferenceError);
+        should.throw(goodFn, ReferenceError);
+    }, 'expected [Function] to throw ReferenceError');
+
+    err(() => {
+        expect(goodFn).to.throw(specificError);
+        goodFn.should.throw(specificError);
+        should.throw(goodFn, specificError);
+    }, 'expected [Function] to throw [RangeError: boo]');
+
+    err(() => {
+        expect(badFn).to.not.throw();
+        badFn.should.not.throw();
+        should.not.throw(badFn);
+    }, 'expected [Function] to not throw an error but [Error: testing] was thrown');
+
+    err(() => {
+        expect(badFn).to.throw(ReferenceError);
+        badFn.should.throw(ReferenceError);
+        should.throw(badFn, ReferenceError);
+    }, 'expected [Function] to throw \'ReferenceError\' but [Error: testing] was thrown');
+
+    err(() => {
+        expect(badFn).to.throw(specificError);
+        badFn.should.throw(specificError);
+        should.throw(badFn, specificError);
+    }, 'expected [Function] to throw [RangeError: boo] but [Error: testing] was thrown');
+
+    err(() => {
+        expect(badFn).to.not.throw(Error);
+        badFn.should.not.throw(Error);
+        should.not.throw(badFn, Error);
+    }, 'expected [Function] to not throw \'Error\' but [Error: testing] was thrown');
+
+    err(() => {
+        expect(refErrFn).to.not.throw(ReferenceError);
+        refErrFn.should.not.throw(ReferenceError);
+        should.not.throw(refErrFn, ReferenceError);
+    }, 'expected [Function] to not throw \'ReferenceError\' but [ReferenceError: hello] was thrown');
+
+    err(() => {
+        expect(badFn).to.throw(PoorlyConstructedError);
+        badFn.should.throw(PoorlyConstructedError);
+        should.throw(badFn, PoorlyConstructedError);
+    }, 'expected [Function] to throw \'PoorlyConstructedError\' but [Error: testing] was thrown');
+
+    err(() => {
+        expect(ickyErrFn).to.not.throw(PoorlyConstructedError);
+        ickyErrFn.should.not.throw(PoorlyConstructedError);
+        should.not.throw(ickyErrFn, PoorlyConstructedError);
+    }, /^(expected \[Function\] to not throw 'PoorlyConstructedError' but)(.*)(PoorlyConstructedError|\{ Object \()(.*)(was thrown)$/);
+
+    err(() => {
+        expect(ickyErrFn).to.throw(ReferenceError);
+        ickyErrFn.should.throw(ReferenceError);
+        should.throw(ickyErrFn, ReferenceError);
+    }, /^(expected \[Function\] to throw 'ReferenceError' but)(.*)(PoorlyConstructedError|\{ Object \()(.*)(was thrown)$/);
+
+    err(() => {
+        expect(specificErrFn).to.throw(new ReferenceError('eek'));
+        specificErrFn.should.throw(new ReferenceError('eek'));
+        should.throw(specificErrFn, new ReferenceError('eek'));
+    }, 'expected [Function] to throw [ReferenceError: eek] but [RangeError: boo] was thrown');
+
+    err(() => {
+        expect(specificErrFn).to.not.throw(specificError);
+        specificErrFn.should.not.throw(specificError);
+        should.not.throw(specificErrFn, specificError);
+    }, 'expected [Function] to not throw [RangeError: boo]');
+
+    err(() => {
+        expect(badFn).to.not.throw(/testing/);
+        badFn.should.not.throw(/testing/);
+        should.not.throw(badFn, /testing/);
+    }, 'expected [Function] to throw error not matching /testing/');
+
+    err(() => {
+        expect(badFn).to.throw(/hello/);
+        badFn.should.throw(/hello/);
+        should.throw(badFn, /hello/);
+    }, 'expected [Function] to throw error matching /hello/ but got \'testing\'');
+
+    err(() => {
+        expect(badFn).to.throw(Error, /hello/, 'blah');
+        badFn.should.throw(Error, /hello/, 'blah');
+        should.throw(badFn, Error, /hello/, 'blah');
+    }, 'blah: expected [Function] to throw error matching /hello/ but got \'testing\'');
+
+    err(() => {
+        expect(badFn).to.throw(Error, 'hello', 'blah');
+        badFn.should.throw(Error, 'hello', 'blah');
+        should.throw(badFn, Error, 'hello', 'blah');
+    }, 'blah: expected [Function] to throw error including \'hello\' but got \'testing\'');
+}
+
+function use() {
+    // ReSharper disable once InconsistentNaming
+    chai.use((_chai) => {
+        _chai.can.use.any();
+    });
+}
+
+class Klass {
+    val: number;
+    constructor() { this.val = 0; }
+    bar() { }
+
+    static baz() { }
+}
+
+function respondTo() {
+    var obj = new Klass();
+
+    expect(Klass).to.respondTo('bar');
+    expect(obj).respondsTo('bar');
+    Klass.should.respondTo('bar');
+    Klass.should.respondsTo('bar');
+    expect(Klass).to.not.respondTo('foo');
+    Klass.should.not.respondTo('foo');
+    expect(Klass).itself.to.respondTo('func');
+    expect(Klass).itself.not.to.respondTo('bar');
+
+    expect(obj).not.to.respondTo('foo');
+    obj.should.not.respondTo('foo');
+
+    err(() => {
+        expect(Klass).to.respondTo('baz', 'constructor');
+        Klass.should.respondTo('baz', 'constructor');
+    }, /^(constructor: expected)(.*)(\[Function: Klass\])(.*)(to respond to \'baz\')$/);
+
+    err(() => {
+        expect(obj).to.respondTo('baz', 'object');
+        obj.should.respondTo('baz', 'object');
+    }, /^(object: expected)(.*)(\{ foo: \[Function\] \}|\{ Object \()(.*)(to respond to \'baz\')$/);
+}
+
+function satisfy() {
+    function matcher(num: number) {
+        return num === 1;
+    }
+
+    expect(1).to.satisfy(matcher);
+    (1).should.satisfy(matcher);
+
+    err(() => {
+        expect(2).to.satisfy(matcher, 'blah');
+        (2).should.satisfy(matcher, 'blah');
+    }, 'blah: expected 2 to satisfy [Function: matcher]');
+}
+
+function closeTo() {
+    expect(1.5).to.be.closeTo(1.0, 0.5);
+    (1.5).should.be.closeTo(1.0, 0.5);
+    expect(10).to.be.closeTo(20, 20);
+    (10).should.be.closeTo(20, 20);
+    expect(-10).to.be.closeTo(20, 30);
+    (-10).should.be.closeTo(20, 30);
+
+    err(() => {
+        expect(2).to.be.closeTo(1.0, 0.5, 'blah');
+        (2).should.be.closeTo(1.0, 0.5, 'blah');
+    }, 'blah: expected 2 to be close to 1 +/- 0.5');
+
+    err(() => {
+        expect(-10).to.be.closeTo(20, 29, 'blah');
+        (-10).should.be.closeTo(20, 29, 'blah');
+    }, 'blah: expected -10 to be close to 20 +/- 29');
+}
+
+function includeMembers() {
+    expect([1, 2, 3]).to.include.members([]);
+    [1, 2, 3].should.include.members([]);
+
+    expect([1, 2, 3]).to.include.members([3, 2]);
+
+    [1, 2, 3].should.include.members([3, 2]);
+
+    expect([1, 2, 3]).to.not.include.members([8, 4]);
+
+    [1, 2, 3].should.not.include.members([8, 4]);
+
+    expect([1, 2, 3]).to.not.include.members([1, 2, 3, 4]);
+
+    [1, 2, 3].should.not.include.members([1, 2, 3, 4]);
+}
+
+function sameMembers() {
+    expect([5, 4]).to.have.same.members([4, 5]);
+    [5, 4].should.have.same.members([4, 5]);
+    expect([5, 4]).to.have.same.members([5, 4]);
+    [5, 4].should.have.same.members([5, 4]);
+
+    expect([5, 4]).to.not.have.same.members([]);
+    [5, 4].should.not.have.same.members([]);
+    expect([5, 4]).to.not.have.same.members([6, 3]);
+    [5, 4].should.not.have.same.members([6, 3]);
+    expect([5, 4]).to.not.have.same.members([5, 4, 2]);
+    [5, 4].should.not.have.same.members([5, 4, 2]);
+
+    assert.sameMembers([5, 4], [4, 5]);
+}
+function sameDeepMembers() {
+    expect([{ id: 5 }, { id: 4 }]).to.have.same.deep.members([{ id: 4 }, { id: 5 }]);
+    [{ id: 5 }, { id: 4 }].should.have.same.deep.members([{ id: 4 }, { id: 5 }]);
+    expect([{ id: 5 }, { id: 4 }]).to.have.same.members([{ id: 5 }, { id: 4 }]);
+    [{ id: 5 }, { id: 4 }].should.have.same.members([{ id: 5 }, { id: 4 }]);
+
+    expect([{ id: 5 }, { id: 4 }]).to.not.have.same.members([]);
+    [{ id: 5 }, { id: 4 }].should.not.have.same.members([]);
+    expect([{ id: 5 }, { id: 4 }]).to.not.have.same.members([{ id: 6 }, { id: 3 }]);
+    [{ id: 5 }, { id: 4 }].should.not.have.same.members([{ id: 6 }, { id: 3 }]);
+    expect([{ id: 5 }, { id: 4 }]).to.not.have.same.members([{ id: 5 }, { id: 4 }, { id: 2 }]);
+    [{ id: 5 }, { id: 4 }].should.not.have.same.members([{ id: 5 }, { id: 4 }, { id: 2 }]);
+
+    assert.sameDeepMembers([{ id: 5 }, { id: 4 }], [{ id: 4 }, { id: 5 }]);
+}
+
+function members() {
+    expect([5, 4]).members([4, 5]);
+    expect([5, 4]).members([5, 4]);
+
+    expect([5, 4]).not.members([]);
+    expect([5, 4]).not.members([6, 3]);
+    expect([5, 4]).not.members([5, 4, 2]);
+}
+
+function increaseDecreaseChange() {
+    var obj = { val: 10 };
+    var inc = () => { obj.val++; };
+    var dec = () => { obj.val--; };
+    var same = () => { };
+
+    expect(inc).to.increase(obj, "val");
+    expect(inc).increases(obj, "val");
+    expect(inc).to.change(obj, "val");
+
+    expect(dec).to.decrease(obj, "val");
+    expect(dec).decreases(obj, "val");
+    expect(dec).to.change(obj, "val");
+    expect(dec).changes(obj, "val");
+
+    expect(inc).to.not.decrease(obj, "val");
+    expect(dec).to.not.increase(obj, "val");
+    expect(same).to.not.increase(obj, "val");
+    expect(same).to.not.decrease(obj, "val");
+    expect(same).to.not.change(obj, "val");
+
+    inc.should.increase(obj, "val");
+    inc.should.change(obj, "val");
+
+    dec.should.decrease(obj, "val");
+    dec.should.change(obj, "val");
+
+    inc.should.not.decrease(obj, "val");
+    dec.should.not.increase(obj, "val");
+    same.should.not.change(obj, "val");
+}
+
+//tdd
+declare function suite(description: string, action: Function): void;
+declare function test(description: string, action: Function): void;
+
+interface FieldObj {
+    field: any;
+}
+
+class CrashyObject {
+    inspect(): void {
+        throw new Error('Arg\'s inspect() called even though the test passed');
+    }
+}
+
+suite('assert', () => {
+
+    test('assert', () => {
+        var foo = 'bar';
+        assert(foo === 'bar', 'expected foo to equal `bar`');
+
+        err(() => {
+            assert(foo === 'baz', 'expected foo to equal `bar`');
+        }, 'expected foo to equal `bar`');
+    });
+
+    test('isTrue', () => {
+        assert.isTrue(true);
+
+        err(() => {
+            assert.isTrue(false);
+        }, 'expected false to be true');
+
+        err(() => {
+            assert.isTrue(1);
+        }, 'expected 1 to be true');
+
+        err(() => {
+            assert.isTrue('test');
+        }, 'expected \'test\' to be true');
+    });
+
+    test('ok', () => {
+        assert.ok(true);
+        assert.ok(1);
+        assert.ok('test');
+        assert.isOk(true);
+        assert.isOk(1);
+        assert.isOk('test');
+
+        err(() => {
+            assert.ok(false);
+        }, 'expected false to be truthy');
+
+        err(() => {
+            assert.ok(0);
+        }, 'expected 0 to be truthy');
+
+        err(() => {
+            assert.ok('');
+        }, 'expected \'\' to be truthy');
+    });
+
+    test('notOk', () => {
+        assert.notOk(false);
+        assert.notOk(0);
+        assert.notOk('');
+        assert.isNotOk(false);
+        assert.isNotOk(0);
+        assert.isNotOk('');
+
+        err(() => {
+            assert.notOk(true);
+        }, 'expected true to be falsy');
+
+        err(() => {
+            assert.notOk(1);
+        }, 'expected 1 to be falsy');
+
+        err(() => {
+            assert.notOk('test');
+        }, 'expected \'test\' to be falsy');
+    });
+
+    test('isFalse', () => {
+        assert.isFalse(false);
+
+        err(() => {
+            assert.isFalse(true);
+        }, 'expected true to be false');
+
+        err(() => {
+            assert.isFalse(0);
+        }, 'expected 0 to be false');
+    });
+
+    test('equal', () => {
+        assert.equal(void (0), undefined);
+    });
+
+    test('typeof / notTypeOf', () => {
+        assert.typeOf('test', 'string');
+        assert.typeOf(true, 'boolean');
+        assert.typeOf(5, 'number');
+
+        err(() => {
+            assert.typeOf(5, 'string');
+        }, 'expected 5 to be a string');
+
+    });
+
+    test('notTypeOf', () => {
+        assert.notTypeOf('test', 'number');
+
+        err(() => {
+            assert.notTypeOf(5, 'number');
+        }, 'expected 5 not to be a number');
+    });
+
+    test('instanceOf', () => {
+        assert.instanceOf(new Foo(), Foo);
+
+        err(() => {
+            assert.instanceOf(5, Foo);
+        }, 'expected 5 to be an instance of Foo');
+        assert.instanceOf(new CrashyObject(), CrashyObject);
+    });
+
+    test('notInstanceOf', () => {
+        assert.notInstanceOf(new Foo(), String);
+
+        err(() => {
+            assert.notInstanceOf(new Foo(), Foo);
+        }, 'expected {} to not be an instance of Foo');
+    });
+
+    test('isObject', () => {
+        assert.isObject({});
+        assert.isObject(new Foo());
+
+        err(() => {
+            assert.isObject(true);
+        }, 'expected true to be an object');
+
+        err(() => {
+            assert.isObject(Foo);
+        }, 'expected [Function: Foo] to be an object');
+
+        err(() => {
+            assert.isObject('foo');
+        }, 'expected \'foo\' to be an object');
+    });
+
+    test('isNotObject', () => {
+        assert.isNotObject(5);
+
+        err(() => {
+            assert.isNotObject({});
+        }, 'expected {} not to be an object');
+    });
+
+    test('notEqual', () => {
+        assert.notEqual(3, 4);
+
+        err(() => {
+            assert.notEqual(5, 5);
+        }, 'expected 5 to not equal 5');
+    });
+
+    test('strictEqual', () => {
+        assert.strictEqual('foo', 'foo');
+
+        err(() => {
+            assert.strictEqual('5', 5);
+        }, 'expected \'5\' to equal 5');
+    });
+
+    test('notStrictEqual', () => {
+        assert.notStrictEqual(5, '5');
+
+        err(() => {
+            assert.notStrictEqual(5, 5);
+        }, 'expected 5 to not equal 5');
+    });
+
+    test('deepEqual', () => {
+        assert.deepEqual({ tea: 'chai' }, { tea: 'chai' });
+
+        err(() => {
+            assert.deepEqual({ tea: 'chai' }, { tea: 'black' });
+        }, 'expected { tea: \'chai\' } to deeply equal { tea: \'black\' }');
+
+        var obja = Object.create({ tea: 'chai' })
+            , objb = Object.create({ tea: 'chai' });
+
+        assert.deepEqual(obja, objb);
+
+        var obj1 = Object.create({ tea: 'chai' })
+            , obj2 = Object.create({ tea: 'black' });
+
+        err(() => {
+            assert.deepEqual(obj1, obj2);
+        }, 'expected { tea: \'chai\' } to deeply equal { tea: \'black\' }');
+    });
+
+    test('deepEqual (ordering)', () => {
+        var a = { a: 'b', c: 'd' }
+            , b = { c: 'd', a: 'b' };
+        assert.deepEqual(a, b);
+    });
+
+    test('deepEqual (circular)', () => {
+        var circularObject: any = {}
+            , secondCircularObject: any = {};
+        circularObject.field = circularObject;
+        secondCircularObject.field = secondCircularObject;
+
+        assert.deepEqual(circularObject, secondCircularObject);
+
+        err(() => {
+            secondCircularObject.field2 = secondCircularObject;
+            assert.deepEqual(circularObject, secondCircularObject);
+        }, 'expected { field: [Circular] } to deeply equal { Object (field, field2) }');
+    });
+
+    test('notDeepEqual', () => {
+        assert.notDeepEqual({ tea: 'jasmine' }, { tea: 'chai' });
+        err(() => {
+            assert.notDeepEqual({ tea: 'chai' }, { tea: 'chai' });
+        }, 'expected { tea: \'chai\' } to not deeply equal { tea: \'chai\' }');
+    });
+
+    test('notDeepEqual (circular)', () => {
+        var circularObject: any = {}
+            , secondCircularObject: any = { tea: 'jasmine' };
+        circularObject.field = circularObject;
+        secondCircularObject.field = secondCircularObject;
+
+        assert.notDeepEqual(circularObject, secondCircularObject);
+
+        err(() => {
+            delete secondCircularObject.tea;
+            assert.notDeepEqual(circularObject, secondCircularObject);
+        }, 'expected { field: [Circular] } to not deeply equal { field: [Circular] }');
+    });
+
+    test('isNull', () => {
+        assert.isNull(null);
+
+        err(() => {
+            assert.isNull(undefined);
+        }, 'expected undefined to equal null');
+    });
+
+    test('isNotNull', () => {
+        assert.isNotNull(undefined);
+
+        err(() => {
+            assert.isNotNull(null);
+        }, 'expected null to not equal null');
+    });
+
+    test('isUndefined', () => {
+        assert.isUndefined(undefined);
+
+        err(() => {
+            assert.isUndefined(null);
+        }, 'expected null to equal undefined');
+    });
+
+    test('isDefined', () => {
+        assert.isDefined(null);
+
+        err(() => {
+            assert.isDefined(undefined);
+        }, 'expected undefined to not equal undefined');
+    });
+
+    test('isNaN', () => {
+        assert.isNaN(NaN);
+
+        err(() => {
+            assert.isNaN(12);
+        }, 'expected 12 to be NaN');
+    });
+
+    test('isNotNaN', () => {
+        assert.isNotNaN(12);
+
+        err(() => {
+            assert.isNotNaN(NaN);
+        }, 'expected NaN to not NaN');
+    });
+
+    test('isFunction', () => {
+        var func = () => {
+        };
+        assert.isFunction(func);
+
+        err(() => {
+            assert.isFunction({});
+        }, 'expected {} to be a function');
+    });
+
+    test('isNotFunction', () => {
+        assert.isNotFunction(5);
+
+        err(() => {
+            assert.isNotFunction(() => {
+            });
+        }, 'expected [Function] not to be a function');
+    });
+
+    test('isArray', () => {
+        assert.isArray([]);
+        assert.isArray(new Array<any>());
+
+        err(() => {
+            assert.isArray({});
+        }, 'expected {} to be an array');
+    });
+
+    test('isNotArray', () => {
+        assert.isNotArray(3);
+
+        err(() => {
+            assert.isNotArray([]);
+        }, 'expected [] not to be an array');
+
+        err(() => {
+            assert.isNotArray(new Array<any>());
+        }, 'expected [] not to be an array');
+    });
+
+    test('isString', () => {
+        assert.isString('Foo');
+        assert.isString(new String('foo'));
+
+        err(() => {
+            assert.isString(1);
+        }, 'expected 1 to be a string');
+    });
+
+    test('isNotString', () => {
+        assert.isNotString(3);
+        assert.isNotString(['hello']);
+
+        err(() => {
+            assert.isNotString('hello');
+        }, 'expected \'hello\' not to be a string');
+    });
+
+    test('isNumber', () => {
+        assert.isNumber(1);
+        assert.isNumber(Number('3'));
+
+        err(() => {
+            assert.isNumber('1');
+        }, 'expected \'1\' to be a number');
+    });
+
+    test('isNotNumber', () => {
+        assert.isNotNumber('hello');
+        assert.isNotNumber([5]);
+
+        err(() => {
+            assert.isNotNumber(4);
+        }, 'expected 4 not to be a number');
+    });
+
+    test('isBoolean', () => {
+        assert.isBoolean(true);
+        assert.isBoolean(false);
+
+        err(() => {
+            assert.isBoolean('1');
+        }, 'expected \'1\' to be a boolean');
+    });
+
+    test('isNotBoolean', () => {
+        assert.isNotBoolean('true');
+
+        err(() => {
+            assert.isNotBoolean(true);
+        }, 'expected true not to be a boolean');
+
+        err(() => {
+            assert.isNotBoolean(false);
+        }, 'expected false not to be a boolean');
+    });
+
+    test('include', () => {
+        assert.include('foobar', 'bar');
+        assert.include([1, 2, 3], 3);
+
+        err(() => {
+            assert.include('foobar', 'baz');
+        }, 'expected \'foobar\' to contain \'baz\'');
+
+        err(() => {
+            assert.include(undefined, 'bar');
+        }, 'expected an array or string');
+    });
+
+    test('notInclude', () => {
+        assert.notInclude('foobar', 'baz');
+        assert.notInclude([1, 2, 3], 4);
+
+        err(() => {
+            assert.notInclude('foobar', 'bar');
+        }, 'expected \'foobar\' to not contain \'bar\'');
+
+        err(() => {
+            assert.notInclude(undefined, 'bar');
+        }, 'expected an array or string');
+    });
+
+    test('lengthOf', () => {
+        assert.lengthOf([1, 2, 3], 3);
+        assert.lengthOf('foobar', 6);
+
+        err(() => {
+            assert.lengthOf('foobar', 5);
+        }, 'expected \'foobar\' to have a length of 5 but got 6');
+
+        err(() => {
+            assert.lengthOf(1, 5);
+        }, 'expected 1 to have a property \'length\'');
+    });
+
+    test('match', () => {
+        assert.match('foobar', /^foo/);
+        assert.notMatch('foobar', /^bar/);
+
+        err(() => {
+            assert.match('foobar', /^bar/i);
+        }, 'expected \'foobar\' to match /^bar/i');
+
+        err(() => {
+            assert.notMatch('foobar', /^foo/i);
+        }, 'expected \'foobar\' not to match /^foo/i');
+    });
+
+    test('property', () => {
+        var obj = { foo: { bar: 'baz' } };
+        var simpleObj = { foo: 'bar' };
+        assert.property(obj, 'foo');
+        assert.deepProperty(obj, 'foo.bar');
+        assert.notProperty(obj, 'baz');
+        assert.notProperty(obj, 'foo.bar');
+        assert.notDeepProperty(obj, 'foo.baz');
+        assert.deepPropertyVal(obj, 'foo.bar', 'baz');
+        assert.deepPropertyNotVal(obj, 'foo.bar', 'flow');
+
+        err(() => {
+            assert.property(obj, 'baz');
+        }, 'expected { foo: { bar: \'baz\' } } to have a property \'baz\'');
+
+        err(() => {
+            assert.deepProperty(obj, 'foo.baz');
+        }, 'expected { foo: { bar: \'baz\' } } to have a deep property \'foo.baz\'');
+
+        err(() => {
+            assert.notProperty(obj, 'foo');
+        }, 'expected { foo: { bar: \'baz\' } } to not have property \'foo\'');
+
+        err(() => {
+            assert.notDeepProperty(obj, 'foo.bar');
+        }, 'expected { foo: { bar: \'baz\' } } to not have deep property \'foo.bar\'');
+
+        err(() => {
+            assert.propertyVal(simpleObj, 'foo', 'ball');
+        }, 'expected { foo: \'bar\' } to have a property \'foo\' of \'ball\', but got \'bar\'');
+
+        err(() => {
+            assert.deepPropertyVal(obj, 'foo.bar', 'ball');
+        }, 'expected { foo: { bar: \'baz\' } } to have a deep property \'foo.bar\' of \'ball\', but got \'baz\'');
+
+        err(() => {
+            assert.propertyNotVal(simpleObj, 'foo', 'bar');
+        }, 'expected { foo: \'bar\' } to not have a property \'foo\' of \'bar\'');
+
+        err(() => {
+            assert.deepPropertyNotVal(obj, 'foo.bar', 'baz');
+        }, 'expected { foo: { bar: \'baz\' } } to not have a deep property \'foo.bar\' of \'baz\'');
+    });
+
+    test('throws', () => {
+        assert.throws(() => {
+            throw new Error('foo');
+        });
+        assert.throws(() => {
+            throw new Error('bar');
+        }, 'bar');
+        assert.throws(() => {
+            throw new Error('bar');
+        }, /bar/);
+        assert.throws(() => {
+            throw new Error('bar');
+        }, Error);
+        assert.throws(() => {
+            throw new Error('bar');
+        }, Error, 'bar');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('foo');
+            }, TypeError);
+        }, 'expected [Function] to throw \'TypeError\' but [Error: foo] was thrown');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('foo');
+            }, 'bar');
+        }, 'expected [Function] to throw error including \'bar\' but got \'foo\'');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('foo');
+            }, Error, 'bar');
+        }, 'expected [Function] to throw error including \'bar\' but got \'foo\'');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('foo');
+            }, TypeError, 'bar');
+        }, 'expected [Function] to throw \'TypeError\' but [Error: foo] was thrown');
+
+        err(() => {
+            assert.throws(() => {
+            });
+        }, 'expected [Function] to throw an error');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('');
+            }, 'bar');
+        }, 'expected [Function] to throw error including \'bar\' but got \'\'');
+
+        err(() => {
+            assert.throws(() => {
+                throw new Error('');
+            }, /bar/);
+        }, 'expected [Function] to throw error matching /bar/ but got \'\'');
+    });
+
+    test('doesNotThrow', () => {
+        assert.doesNotThrow(() => {
+        });
+        assert.doesNotThrow(() => {
+        }, 'foo');
+
+        err(() => {
+            assert.doesNotThrow(() => {
+                throw new Error('foo');
+            });
+        }, 'expected [Function] to not throw an error but [Error: foo] was thrown');
+    });
+
+    test('ifError', () => {
+        assert.ifError(false);
+        assert.ifError(null);
+        assert.ifError(undefined);
+
+        err(() => {
+            assert.ifError('foo');
+        }, 'expected \'foo\' to be falsy');
+    });
+
+    test('operator', () => {
+        assert.operator(1, '<', 2);
+        assert.operator(2, '>', 1);
+        assert.operator(1, '==', 1);
+        assert.operator(1, '<=', 1);
+        assert.operator(1, '>=', 1);
+        assert.operator(1, '!=', 2);
+        assert.operator(1, '!==', 2);
+
+        err(() => {
+            assert.operator(1, '=', 2);
+        }, 'Invalid operator "="');
+
+        err(() => {
+            assert.operator(2, '<', 1);
+        }, 'expected 2 to be < 1');
+
+        err(() => {
+            assert.operator(1, '>', 2);
+        }, 'expected 1 to be > 2');
+
+        err(() => {
+            assert.operator(1, '==', 2);
+        }, 'expected 1 to be == 2');
+
+        err(() => {
+            assert.operator(2, '<=', 1);
+        }, 'expected 2 to be <= 1');
+
+        err(() => {
+            assert.operator(1, '>=', 2);
+        }, 'expected 1 to be >= 2');
+
+        err(() => {
+            assert.operator(1, '!=', 1);
+        }, 'expected 1 to be != 1');
+
+        err(() => {
+            assert.operator(1, '!==', '1');
+        }, 'expected 1 to be !== \'1\'');
+    });
+
+    test('closeTo', () => {
+        assert.closeTo(1.5, 1.0, 0.5);
+        assert.closeTo(10, 20, 20);
+        assert.closeTo(-10, 20, 30);
+
+        err(() => {
+            assert.closeTo(2, 1.0, 0.5);
+        }, 'expected 2 to be close to 1 +/- 0.5');
+
+        err(() => {
+            assert.closeTo(-10, 20, 29);
+        }, 'expected -10 to be close to 20 +/- 29');
+    });
+
+    test('members', () => {
+        assert.includeMembers([1, 2, 3], [2, 3]);
+        assert.includeMembers([1, 2, 3], []);
+        assert.includeMembers([1, 2, 3], [3]);
+
+        err(() => {
+            assert.includeMembers([5, 6], [7, 8]);
+        }, 'expected [ 5, 6 ] to be a superset of [ 7, 8 ]');
+
+        err(() => {
+            assert.includeMembers([5, 6], [5, 6, 0]);
+        }, 'expected [ 5, 6 ] to be a superset of [ 5, 6, 0 ]');
+    });
+
+    test('memberEquals', () => {
+        assert.sameMembers([], []);
+        assert.sameMembers([1, 2, 3], [3, 2, 1]);
+        assert.sameMembers([4, 2], [4, 2]);
+
+        err(() => {
+            assert.sameMembers([], [1, 2]);
+        }, 'expected [] to have the same members as [ 1, 2 ]');
+
+        err(() => {
+            assert.sameMembers([1, 54], [6, 1, 54]);
+        }, 'expected [ 1, 54 ] to have the same members as [ 6, 1, 54 ]');
+    });
+
+
+    test('isAbove', () => {
+        assert.isAbove(10, 5);
+
+        err(() => {
+            assert.isAbove(1, 5);
+        }, 'expected 1 to be above 5');
+        err(() => {
+            assert.isAbove(5, 5);
+        }, 'expected 5 to be above 5');
+    });
+
+    test('isBelow', () => {
+        assert.isBelow(5, 10);
+
+        err(() => {
+            assert.isBelow(5, 1);
+        }, 'expected 5 to be above 1');
+        err(() => {
+            assert.isBelow(5, 5);
+        }, 'expected 5 to be below 5');
+    });
+
+    test('extensible', () => { assert.extensible({}); });
+    test('isExtensible', () => { assert.isExtensible({}); });
+    test('notExtensible', () => { assert.notExtensible(Object.preventExtensions({})); });
+    test('isNotExtensible', () => { assert.isNotExtensible(Object.preventExtensions({})); });
+
+    test('sealed', () => { assert.sealed(Object.seal({})); });
+    test('isSealed', () => { assert.isSealed(Object.seal({})); });
+    test('notSealed', () => { assert.notSealed({}); });
+    test('isNotSealed', () => { assert.isNotSealed({}); });
+
+    test('frozen', () => { assert.frozen(Object.freeze({})); });
+    test('isFrozen', () => { assert.isFrozen(Object.freeze({})); });
+    test('notFrozen', () => { assert.notFrozen({}); });
+    test('isNotFrozen', () => { assert.isNotFrozen({}); });
+
+});