Use color on rerunMessage and add sinon spy for logger.write

Author: luthfianto

lib/watcher.js

@@ -1,4 +1,5 @@
 'use strict';
+const chalk = require('chalk');
 const nodePath = require('path');
 const debug = require('debug')('ava:watcher');
 const diff = require('lodash.difference');
@@ -18,6 +19,8 @@ function rethrowAsync(err) {
 
 const MIN_DEBOUNCE_DELAY = 10;
 const INITIAL_DEBOUNCE_DELAY = 100;
+const rerunMessage = chalk.gray.dim("To rerun all tests, type 'r', followed by Enter\nTo update snapshots used in the previous tests, type 'u', followed by Enter\n");
+
 
 class Debouncer {
 	constructor(watcher) {
@@ -126,7 +129,7 @@ class Watcher {
 				.then(runStatus => {
 					runStatus.previousFailCount = this.sumPreviousFailures(currentVector);
 					logger.finish(runStatus);
-					logger.write('[ava] To rerun tests, enter `r`\n[ava] To update snapshots used in the previous test run, enter `u`');
+					logger.write(rerunMessage);
 
 					const badCounts = runStatus.failCount + runStatus.rejectionCount + runStatus.exceptionCount;
 					this.clearLogOnNextRun = this.clearLogOnNextRun && badCounts === 0;

test/watcher.js

@@ -78,7 +78,8 @@ group('chokidar', (beforeEach, test, group) => {
 			finish: sinon.spy(),
 			section: sinon.spy(),
 			clear: sinon.stub().returns(true),
-			reset: sinon.spy()
+			reset: sinon.spy(),
+			write: sinon.spy()
 		};
 
 		api = {