feat(ui): add new ui logVerbose method

no issue
- outputs to log only when verbose is true

Author: acburdine

lib/ui/index.js

@@ -241,6 +241,19 @@ class UI {
         }
     }
 
+    /**
+     * Same options as log, but only logs when `verbose` is set to true
+     *
+     * @param {string} message
+     * @param {string} color
+     * @param {bool} stderr
+     */
+    logVerbose(message, color, stderr) {
+        if (this.verbose) {
+            return this.log(message, color, stderr);
+        }
+    }
+
     /**
      * Shorthand helper to output a green message
      *

test/unit/ui/index-spec.js

@@ -1,6 +1,7 @@
 'use strict';
 const expect = require('chai').expect;
 const chalk = require('chalk');
+const sinon = require('sinon');
 const streamTestUtils = require('../../utils/stream');
 const UI = require('../../../lib/ui');
 
@@ -45,6 +46,25 @@ describe('Unit: UI', function () {
         });
     });
 
+    describe('#logVerbose', function () {
+        it('passes through options to log method when verbose is set', function () {
+            let ui = new UI({verbose: true});
+            let logStub = sinon.stub(ui, 'log');
+
+            ui.logVerbose('foo', 'green', true);
+            expect(logStub.calledOnce).to.be.true;
+            expect(logStub.args[0]).to.deep.equal(['foo', 'green', true]);
+        });
+
+        it('does not call log when verbose is false', function () {
+            let ui = new UI({verbose: false});
+            let logStub = sinon.stub(ui, 'log');
+
+            ui.logVerbose('foo', 'green', false);
+            expect(logStub.called).to.be.false;
+        });
+    });
+
     it('#success outputs message with correct formatting', function (done) {
         let stdout, ui;