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Diffstat (limited to 'node_modules/tiny-emitter/test/index.js')
| -rw-r--r-- | node_modules/tiny-emitter/test/index.js | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/node_modules/tiny-emitter/test/index.js b/node_modules/tiny-emitter/test/index.js new file mode 100644 index 00000000..7f95f62f --- /dev/null +++ b/node_modules/tiny-emitter/test/index.js @@ -0,0 +1,217 @@ +var Emitter = require('../index'); +var emitter = require('../instance'); +var test = require('tape'); + +test('subscribes to an event', function (t) { + var emitter = new Emitter(); + emitter.on('test', function () {}); + + t.equal(emitter.e.test.length, 1, 'subscribed to event'); + t.end(); +}); + +test('subscribes to an event with context', function (t) { + var emitter = new Emitter(); + var context = { + contextValue: true + }; + + emitter.on('test', function () { + t.ok(this.contextValue, 'is in context'); + t.end(); + }, context); + + emitter.emit('test'); +}); + +test('subscibes only once to an event', function (t) { + var emitter = new Emitter(); + + emitter.once('test', function () { + t.notOk(emitter.e.test, 'removed event from list'); + t.end(); + }); + + emitter.emit('test'); +}); + +test('keeps context when subscribed only once', function (t) { + var emitter = new Emitter(); + var context = { + contextValue: true + }; + + emitter.once('test', function () { + t.ok(this.contextValue, 'is in context'); + t.notOk(emitter.e.test, 'not subscribed anymore'); + t.end(); + }, context); + + emitter.emit('test'); +}); + +test('emits an event', function (t) { + var emitter = new Emitter(); + + emitter.on('test', function () { + t.ok(true, 'triggered event'); + t.end(); + }); + + emitter.emit('test'); +}); + +test('passes all arguments to event listener', function (t) { + var emitter = new Emitter(); + + emitter.on('test', function (arg1, arg2) { + t.equal(arg1, 'arg1', 'passed the first argument'); + t.equal(arg2, 'arg2', 'passed the second argument'); + t.end(); + }); + + emitter.emit('test', 'arg1', 'arg2'); +}); + +test('unsubscribes from all events with name', function (t) { + var emitter = new Emitter(); + emitter.on('test', function () { + t.fail('should not get called'); + }); + emitter.off('test'); + emitter.emit('test') + + process.nextTick(function () { + t.end(); + }); +}); + +test('unsubscribes single event with name and callback', function (t) { + var emitter = new Emitter(); + var fn = function () { + t.fail('should not get called'); + } + + emitter.on('test', fn); + emitter.off('test', fn); + emitter.emit('test') + + process.nextTick(function () { + t.end(); + }); +}); + +// Test added by https://github.com/lazd +// From PR: https://github.com/scottcorgan/tiny-emitter/pull/6 +test('unsubscribes single event with name and callback when subscribed twice', function (t) { + var emitter = new Emitter(); + var fn = function () { + t.fail('should not get called'); + }; + + emitter.on('test', fn); + emitter.on('test', fn); + + emitter.off('test', fn); + emitter.emit('test'); + + process.nextTick(function () { + t.notOk(emitter.e['test'], 'removes all events'); + t.end(); + }); +}); + +test('unsubscribes single event with name and callback when subscribed twice out of order', function (t) { + var emitter = new Emitter(); + var calls = 0; + var fn = function () { + t.fail('should not get called'); + }; + var fn2 = function () { + calls++; + }; + + emitter.on('test', fn); + emitter.on('test', fn2); + emitter.on('test', fn); + emitter.off('test', fn); + emitter.emit('test'); + + process.nextTick(function () { + t.equal(calls, 1, 'callback was called'); + t.end(); + }); +}); + +test('removes an event inside another event', function (t) { + var emitter = new Emitter(); + + emitter.on('test', function () { + t.equal(emitter.e.test.length, 1, 'event is still in list'); + + emitter.off('test'); + + t.notOk(emitter.e.test, 0, 'event is gone from list'); + t.end(); + }); + + emitter.emit('test'); +}); + +test('event is emitted even if unsubscribed in the event callback', function (t) { + var emitter = new Emitter(); + var calls = 0; + var fn = function () { + calls += 1; + emitter.off('test', fn); + }; + + emitter.on('test', fn); + + emitter.on('test', function () { + calls += 1; + }); + + emitter.on('test', function () { + calls += 1; + }); + + process.nextTick(function () { + t.equal(calls, 3, 'all callbacks were called'); + t.end(); + }); + + emitter.emit('test'); +}); + +test('calling off before any events added does nothing', function (t) { + var emitter = new Emitter(); + emitter.off('test', function () {}); + t.end(); +}); + +test('emitting event that has not been subscribed to yet', function (t) { + var emitter = new Emitter(); + + emitter.emit('some-event', 'some message'); + t.end(); +}); + +test('unsubscribes single event with name and callback which was subscribed once', function (t) { + var emitter = new Emitter(); + var fn = function () { + t.fail('event not unsubscribed'); + } + + emitter.once('test', fn); + emitter.off('test', fn); + emitter.emit('test'); + + t.end(); +}); + +test('exports an instance', function (t) { + t.ok(emitter, 'exports an instance') + t.ok(emitter instanceof Emitter, 'an instance of the Emitter class'); + t.end(); +}); |
