Create ttl-score-generator.spec.js

Added some unit tests for `service/ttl-score-generator`.

Author: paul-graham

test/spec/app/service/ttl-score-generator.spec.js

@@ -0,0 +1,40 @@
+
+const expect = require('chai').expect;
+const config = require('config');
+const sandbox = require("sinon").createSandbox();
+const ttlScoreGenerator = require('../../../../app/service/ttl-score-generator');
+
+describe('service.ttl-score-generator', () => {
+
+  afterEach(() => {
+    sandbox.restore();
+  });
+
+  describe('getScore', () => {
+    it('should handle an activity TTL', () => {
+      const TTL = '12';
+      const NOW = 55;
+      sandbox.stub(Date, 'now').returns(NOW);
+      sandbox.stub(config, 'get').returns(TTL);
+      const score = ttlScoreGenerator.getScore();
+      expect(score).to.equal(12055); // (TTL * 1000) + NOW
+    });
+    it('should handle a numeric TTL', () => {
+      const TTL = 13;
+      const NOW = 55;
+      sandbox.stub(Date, 'now').returns(NOW);
+      sandbox.stub(config, 'get').returns(TTL);
+      const score = ttlScoreGenerator.getScore();
+      expect(score).to.equal(13055); // (TTL * 1000) + NOW
+    });
+    it('should handle a null TTL', () => {
+      const TTL = null;
+      const NOW = 55;
+      sandbox.stub(Date, 'now').returns(NOW);
+      sandbox.stub(config, 'get').returns(TTL);
+      const score = ttlScoreGenerator.getScore();
+      expect(score).to.equal(55); // null TTL => 0
+    });
+  });
+
+});