injects usersStat dependency to improve code coverage of Logs class

lib/plugins/logs/logs.js

@@ -1,11 +1,12 @@
 'use strict';
 
 const BbPromise = require('bluebird');
-const userStats = require('../../utils/userStats');
+const defaultUserStats = require('../../utils/userStats');
 
 class Logs {
-  constructor(serverless) {
+  constructor(serverless, userStats) {
     this.serverless = serverless;
+    this.userStats = userStats || defaultUserStats;
 
     this.commands = {
       logs: {
@@ -55,7 +56,7 @@ class Logs {
     if (sls && sls.processedInput && sls.processedInput.options) {
       const opts = sls.processedInput.options;
       const type = (opts.tail) ? 'service_logsTailed' : 'service_logsViewed';
-      userStats.track(type);
+      this.userStats.track(type);
     }
     return BbPromise.resolve();
   }

lib/plugins/logs/logs.test.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const expect = require('chai').expect;
+const sinon = require('sinon');
 const Logs = require('./logs');
 const Serverless = require('../../Serverless');
 
@@ -16,4 +17,45 @@ describe('Logs', () => {
   describe('#constructor()', () => {
     it('should have commands', () => expect(logs.commands).to.be.not.empty);
   });
+
+  describe('#track()', () => {
+    let userStats;
+
+    beforeEach(() => {
+      userStats = { track: sinon.spy() };
+    });
+
+    describe('Without cli processed input', () => {
+      it('do not track user stats', () => {
+        const newLogs = new Logs(serverless, userStats);
+
+        return newLogs.track()
+        .then(() => {
+          expect(userStats.track.called).to.be.equal(false);
+        });
+      });
+    });
+
+    describe('With cli processed input', () => {
+      it('tracks user stats with viewed option', () => {
+        serverless.processedInput = { commands: [], options: {} };
+
+        return new Logs(serverless, userStats).track()
+        .then(() => {
+          expect(userStats.track.calledWithExactly('service_logsViewed'))
+          .to.be.equal(true);
+        });
+      });
+
+      it('tracks user stats with tailed option', () => {
+        serverless.processedInput = { commands: [], options: { tail: true } };
+
+        return new Logs(serverless, userStats).track()
+        .then(() => {
+          expect(userStats.track.calledWithExactly('service_logsTailed'))
+          .to.be.equal(true);
+        });
+      });
+    });
+  });
 });