From 6360305b28f205ded2bf7742b2374ee57f34e16b Mon Sep 17 00:00:00 2001
From: Muthu Kumar <muthukumar@thefeathers.in>
Date: Fri, 14 Sep 2018 10:28:51 +0530
Subject: [PATCH] [events] emitter-observer event model

---
 package.json             |  2 +-
 sample/sample7.test.js   |  2 +-
 src/gunner.js            | 18 +++++++++++++-----
 src/lib/emitter.js       |  5 +++++
 src/reporters/default.js | 42 ++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 62 insertions(+), 7 deletions(-)
 create mode 100644 src/lib/emitter.js
 create mode 100644 src/reporters/default.js

diff --git a/package.json b/package.json
index 22bf02b..21ec63e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@klenty/gunner",
-	"version": "0.8.7",
+	"version": "0.9.0",
 	"description": "Zero magic, fast test-runner and assertion framework. No magic globals.",
 	"main": "index.js",
 	"repository": {
diff --git a/sample/sample7.test.js b/sample/sample7.test.js
index da4d5ff..091e1ff 100644
--- a/sample/sample7.test.js
+++ b/sample/sample7.test.js
@@ -99,4 +99,4 @@ gunner.test('(should fail) should not resolve to 5', () =>
 const trace = process.argv.slice(2).indexOf('--trace') !== -1;
 const log = process.argv.slice(2).indexOf('--log') !== -1;
 
-gunner.run({ trace, log }).then(console.log);
+gunner.run({ trace, log });
diff --git a/src/gunner.js b/src/gunner.js
index 2470336..7510725 100644
--- a/src/gunner.js
+++ b/src/gunner.js
@@ -1,8 +1,10 @@
 'use strict';
 
 const { arrayOrPush } = require('./util');
-const caller = require('./lib/caller');
 
+const caller = require('./lib/caller');
+const emitter = require('./lib/emitter');
+const reporter = require('./reporters/default');
 const testrunner = require('./lib/testrunner');
 const { expect, expectMany } = require('./lib/expect');
 
@@ -67,15 +69,21 @@ class Gunner {
 	}
 
 	run (options = {}) {
+		(options.reporter || reporter)(emitter, options);
+
+		emitter.emit('start');
 		return testrunner(this, options)
 		.then(results => {
-			const success = results.filter(r => r.status === 'ok');
-			const successPercent = Math.floor(
-				success.length/results.length * 100
+			results.success = results.filter(r => r.status === 'ok');
+			results.successPercent = Math.floor(
+				results.success.length/results.length * 100
 			);
 
-			if((successPercent !== 100) && typeof process !== 'undefined')
+			if((results.successPercent !== 100)
+				&& typeof process !== 'undefined')
 				process.exitCode = 1;
+			emitter.emit('test end', results);
+			emitter.emit('end', results);
 
 			return results;
 		});
diff --git a/src/lib/emitter.js b/src/lib/emitter.js
new file mode 100644
index 0000000..65ccd9b
--- /dev/null
+++ b/src/lib/emitter.js
@@ -0,0 +1,5 @@
+const EventEmitter = require('events');
+
+class GunnerEmitter extends EventEmitter {}
+
+module.exports = new GunnerEmitter();
diff --git a/src/reporters/default.js b/src/reporters/default.js
new file mode 100644
index 0000000..07f5667
--- /dev/null
+++ b/src/reporters/default.js
@@ -0,0 +1,42 @@
+const statusMap = {
+
+	'ok': [ 'ok', '✅' ],
+	'notOk': [ 'notOk', '❌' ],
+	'skip': [ 'skip', '⚠️' ],
+
+};
+
+function Default (runner, options) {
+
+	runner.on('start', () => console.log('Started tests'));
+
+	runner.on('test end', results => {
+
+		results.map(x => {
+
+			const s = statusMap[x.status];
+
+			console.log('>', s[0], s[1], x.description);
+			(options.trace
+			&& x.reason
+			&& console.log('\n---\n\n', x.reason, '\n\n---\n'));
+
+		});
+
+	});
+
+	runner.on('end', results => {
+
+		console.log(
+			results.success.length,
+			'tests of',
+			results.length,
+			'passed'
+		);
+		console.log('Success ratio:', results.successPercent, '%');
+
+	});
+
+}
+
+module.exports = Default;