Added ruler tests

test/ruler.js

@@ -0,0 +1,135 @@
+/*global describe, it*/
+'use strict';
+
+
+var assert = require('assert');
+var Ruler  = require('../lib/ruler');
+
+describe('Ruler', function () {
+
+  it('should replace rule (.at)', function () {
+    var ruler = new Ruler();
+    var res = 0;
+
+    ruler.push('test', function foo() { res = 1; });
+    ruler.at('test', function bar() { res = 2; });
+
+    var rules = ruler.getRules('');
+
+    assert.strictEqual(rules.length, 1);
+    rules[0]();
+    assert.strictEqual(res, 2);
+  });
+
+
+  it('should inject before/after rule', function () {
+    var ruler = new Ruler();
+    var res = 0;
+
+    ruler.push('test', function foo() { res = 1; });
+    ruler.before('test', 'before_test', function fooBefore() { res = -10; });
+    ruler.after('test', 'after_test', function fooAfter() { res = 10; });
+
+    var rules = ruler.getRules('');
+
+    assert.strictEqual(rules.length, 3);
+    rules[0]();
+    assert.strictEqual(res, -10);
+    rules[1]();
+    assert.strictEqual(res, 1);
+    rules[2]();
+    assert.strictEqual(res, 10);
+  });
+
+
+  it('should enable/disable rule', function () {
+    var rules, ruler = new Ruler();
+
+    ruler.push('test', function foo() {});
+    ruler.push('test2', function bar() {});
+
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 2);
+
+    ruler.disable('test');
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 1);
+    ruler.disable('test2');
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 0);
+
+    ruler.enable('test');
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 1);
+    ruler.enable('test2');
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 2);
+  });
+
+
+  it('should enable/disable multiple rule', function () {
+    var rules, ruler = new Ruler();
+
+    ruler.push('test', function foo() {});
+    ruler.push('test2', function bar() {});
+
+    ruler.disable([ 'test', 'test2' ]);
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 0);
+    ruler.enable([ 'test', 'test2' ]);
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 2);
+  });
+
+
+  it('should enable rules by whitelist', function () {
+    var rules, ruler = new Ruler();
+
+    ruler.push('test', function foo() {});
+    ruler.push('test2', function bar() {});
+
+    ruler.enable('test', true);
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 1);
+  });
+
+
+  it('should support multiple chains', function () {
+    var rules, ruler = new Ruler();
+
+    ruler.push('test', function foo() {});
+    ruler.push('test2', function bar() {}, { alt: [ 'alt1' ] });
+    ruler.push('test2', function bar() {}, { alt: [ 'alt1', 'alt2' ] });
+
+    rules = ruler.getRules('');
+    assert.strictEqual(rules.length, 3);
+    rules = ruler.getRules('alt1');
+    assert.strictEqual(rules.length, 2);
+    rules = ruler.getRules('alt2');
+    assert.strictEqual(rules.length, 1);
+  });
+
+
+  it('should fail on invalid rule name', function () {
+    var ruler = new Ruler();
+
+    ruler.push('test', function foo() {});
+
+    assert.throws(function () {
+      ruler.at('invalid name', function bar() {});
+    });
+    assert.throws(function () {
+      ruler.before('invalid name', function bar() {});
+    });
+    assert.throws(function () {
+      ruler.after('invalid name', function bar() {});
+    });
+    assert.throws(function () {
+      ruler.enable('invalid name');
+    });
+    assert.throws(function () {
+      ruler.disable('invalid name');
+    });
+  });
+
+});