[feature] Added support for before and after hooks

.eslintrc.js

@@ -25,5 +25,6 @@ module.exports = {
 		"linebreak-style": [ "error", "unix" ],
 		"semi": [ "error", "always" ],
 		"eqeqeq": [ "error", "always", {"null": "ignore"} ],
+		"no-global-assign": 0,
 	}
 };

gunner/index.js

@@ -1,5 +1,9 @@
+'use strict';
+
 const { log } = console;
 
+Promise = require('bluebird');
+
 const _runTests = require('./lib/runTests');
 const _expect = require('./lib/expect');
 
@@ -8,12 +12,30 @@ const { stringify, hasProp } = require('../util/helpers');
 class Gunner {
 
 	constructor (options = {}) {
-		this.tests = [];
+		this.__hooks__ = {
+			before: {
+				'@start': [],
+				'@end': [],
+				'*': [],
+			},
+			after: {
+				'*': [],
+			},
+		};
+		this.__state__ = [];
+		this.__tests__ = [];
 		this.name = options.name;
 	}
 
 	test (description, test) {
-		this.tests.push({
+		const existing = (
+			this.__tests__
+			.find(x => x.description === description)
+		);
+		if (existing)
+			throw new Error(`Test '${description}' already exists!`);
+
+		this.__tests__.push({
 			description,
 			test: () => {
 				try {
@@ -24,11 +46,39 @@ class Gunner {
 				}
 			},
 		});
+
+		return this;
+	}
+
+	before (description, run) {
+		const hook = {
+			description,
+			run,
+		};
+
+		this.__hooks__.before[description]
+			? this.__hooks__.before[description].push(hook)
+			: this.__hooks__.before[description] = [ hook ];
+
+		return this;
+	}
+
+	after (description, run) {
+		const hook = {
+			description,
+			run,
+		};
+
+		this.__hooks__.after[description]
+			? this.__hooks__.after[description].push(hook)
+			: this.__hooks__.after[description] = [ hook ];
+
+		return this;
 	}
 
 	run (options = {}) {
 		const shouldLog = (hasProp(options)('log') && options.log) || !(hasProp(options)('log'));
-		return _runTests(this.tests)
+		return _runTests(this)
 		.then(results => {
 			if (shouldLog) {
 				const success = results.filter(r => r.result === 'pass');

gunner/lib/runTests.js

@@ -3,27 +3,65 @@
 const { isPromise } = require('../../util/helpers');
 const { pass, fail } = require('./constants');
 
-const runTests = tests => Promise.all(tests.map(each => {
+const runTests = instance => {
 
-	const pred = each.test();
+	const beforeAll = () => Promise.map(
+		instance.__hooks__.before['@start'],
+		hook => hook.run(),
+	);
 
-	/* There are 4 different cases at play:
-		1. A plain expect() is returned.
-		2. An array of [ expect() ] is returned
-		3. A plain expect() is wrapped in a promise
-		4. An array of [ expect() ] is wrapped in a promise.
-		Here we normalise all of them into something we can process */
+	const beforeEvery = () => Promise.mapSeries(
+		instance.__hooks__.before['*'] || [],
+		hook => hook.run(),
+	);
 
-	if (!isPromise(pred) && !(pred && isPromise(pred[0])))
-		throw new Error(`Malformed test '${each.description}'`);
-	const toTest = Array.isArray(pred)
-		? Promise.all(pred)
-		: pred.then(x => Array.isArray(x) ? Promise.all(x) : x);
+	const runner = () => Promise.mapSeries(instance.__tests__, each => {
 
-	return toTest
-	.then(() => ({ description: each.description, result: pass }))
-	.catch(e => ({ description: each.description, result: fail, error: e }));
+		const beforeThis = () => Promise.mapSeries(
+			instance.__hooks__.before[each.description] || [],
+			hook => hook.run(),
+		);
 
-}));
+		const afterThis = () => Promise.mapSeries(
+			instance.__hooks__.after[each.description] || [],
+			hook => hook.run(),
+		);
+
+		return beforeEvery().then(() => beforeThis()).then(() => {
+
+			const pred = each.test();
+
+			/* There are 4 different cases at play:
+				1. A plain expect() is returned.
+				2. An array of [ expect() ] is returned
+				3. A plain expect() is wrapped in a promise
+				4. An array of [ expect() ] is wrapped in a promise.
+				Here we normalise all of them into something we can process */
+
+			if (!isPromise(pred) && !(pred && isPromise(pred[0])))
+				throw new Error(`Malformed test '${each.description}'`);
+			const toTest = Array.isArray(pred)
+				? Promise.all(pred)
+				: pred.then(x => Array.isArray(x) ? Promise.all(x) : x);
+
+			return toTest
+			.then(() => ({ description: each.description, result: pass }))
+			.catch(e => ({ description: each.description, result: fail, error: e }));
+
+		})
+		.then(result => afterThis().then(() => result));
+
+	});
+
+	const afterAll = () => Promise.mapSeries(
+		instance.__hooks__.before['@end'],
+		hook => hook.run(),
+	);
+
+	return beforeAll()
+	.then(() => runner())
+	.then(results => afterAll().then(() => results));
+
+};
 
 module.exports = runTests;

package.json

@@ -1,28 +1,29 @@
 {
-  "name": "@klenty/gunner",
-  "version": "0.2.5",
-  "description": "Zero magic, fast test-runner and assertion framework. No magic globals.",
-  "main": "index.js",
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/vengatkrishnaraj/gunner.git"
-  },
-  "keywords": [
-    "klenty",
-    "gunner",
-    "test",
-    "tdd",
-    "unit testing"
-  ],
-  "author": "Muthu Kumar <@MKRhere> (https://mkr.pw)",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/vengatkrishnaraj/testsuite/issues"
-  },
-  "homepage": "https://github.com/vengatkrishnaraj/testsuite#readme",
-  "dependencies": {
-    "@codefeathers/iseq": "^1.2.1",
-    "eslint": "^5.2.0",
-    "fs-extra": "^7.0.0"
-  }
+	"name": "@klenty/gunner",
+	"version": "0.3.0",
+	"description": "Zero magic, fast test-runner and assertion framework. No magic globals.",
+	"main": "index.js",
+	"repository": {
+		"type": "git",
+		"url": "git+https://github.com/klenty/gunner.git"
+	},
+	"keywords": [
+		"klenty",
+		"gunner",
+		"test",
+		"tdd",
+		"unit testing"
+	],
+	"author": "Muthu Kumar <@MKRhere> (https://mkr.pw)",
+	"license": "MIT",
+	"bugs": {
+		"url": "https://github.com/klenty/gunner/issues"
+	},
+	"homepage": "https://github.com/klenty/gunner#readme",
+	"dependencies": {
+		"@codefeathers/iseq": "^1.2.1",
+		"bluebird": "^3.5.1",
+		"eslint": "^5.2.0",
+		"json-stringify-safe": "^5.0.1"
+	}
 }

util/helpers.js

@@ -1,3 +1,5 @@
+const stringify = require('json-stringify-safe');
+
 module.exports = {
 
 	/* Returns true if a promise is passed */
@@ -48,7 +50,7 @@ module.exports = {
 	/* Stringifies object or coerces to string */
 	stringify : obj =>
 		typeof obj === 'object'
-			? (obj.stack || JSON.stringify(obj))
+			? (obj.stack || stringify(obj))
 			: obj,
 
 	/* Short circuits with given value on pred. Else calls function */