patches to reliability computation based on settings

test/server/services/karma.js

@@ -0,0 +1,53 @@
+const chai = require('chai');
+const { expect } = chai;
+const { merge } = require('lodash');
+const Karma = require('../../../services/karma');
+
+const thresholdsBackup = {};
+const thresholdsOverride = {
+  comment: {
+    RELIABLE: 1,
+    UNRELIABLE: -1,
+  },
+  flag: {
+    RELIABLE: 1,
+    UNRELIABLE: -1,
+  },
+};
+
+describe('services.Karma', () => {
+  before(() => {
+    // Backup the existing thresholds.
+    merge(thresholdsBackup, Karma.THRESHOLDS);
+
+    // Configure the thresholds to a known value.
+    merge(Karma.THRESHOLDS, thresholdsOverride);
+
+    expect(Karma.THRESHOLDS).to.deep.equal(thresholdsOverride);
+  });
+
+  after(() => {
+    // Restore the thresholds.
+    merge(Karma.THRESHOLDS, thresholdsBackup);
+
+    expect(Karma.THRESHOLDS).to.deep.equal(thresholdsBackup);
+  });
+
+  describe('#isReliable', () => {
+    it('neutral', () => {
+      expect(Karma.isReliable('comment', {})).to.be.null;
+      expect(Karma.isReliable('comment', { comment: {} })).to.be.null;
+      expect(Karma.isReliable('comment', { comment: { karma: 0 } })).to.be.null;
+    });
+    it('unreliable', () => {
+      expect(Karma.isReliable('comment', { comment: { karma: -1 } })).to.be
+        .false;
+      expect(Karma.isReliable('comment', { comment: { karma: -2 } })).to.be
+        .false;
+    });
+    it('reliable', () => {
+      expect(Karma.isReliable('comment', { comment: { karma: 1 } })).to.be.true;
+      expect(Karma.isReliable('comment', { comment: { karma: 2 } })).to.be.true;
+    });
+  });
+});