Reduce duplication

Some would also say it'd be a good idea not to put random stuff in the
global namespace. One day I'll figure it out.

source/scripts/tests/reader/_abstract.coffee

@@ -0,0 +1,6 @@
+this.testReader = (name, testCases) ->
+    injector = angular.injector(["ng", "sideBySide"])
+    reader = injector.get(name)
+
+    for testCase in testCases
+        deepEqual(reader(testCase.tested), testCase.expected)