84 lines
3.3 KiB
JavaScript
84 lines
3.3 KiB
JavaScript
var tape = require("tape");
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var EventEmitter = require("..");
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tape.test("eventemitter", function(test) {
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var ee = new EventEmitter();
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var fn;
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var ctx = {};
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test.equal(Object.getPrototypeOf(ee._listeners), null, "should not inherit listener lookup keys");
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test.doesNotThrow(function() {
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ee.emit("a", 1);
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ee.off();
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ee.off("a");
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ee.off("a", function() {});
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}, "should not throw if no listeners are registered");
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test.equal(ee.on("a", function(arg1) {
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test.equal(this, ctx, "should be called with this = ctx");
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test.equal(arg1, 1, "should be called with arg1 = 1");
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}, ctx), ee, "should return itself when registering events");
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ee.emit("a", 1);
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ee.off("a");
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test.same(Object.keys(ee._listeners), [ "a" ], "should keep the event key when calling off(evt)");
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test.same(ee._listeners.a, [], "should remove all listeners of the respective event when calling off(evt)");
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ee.off();
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test.equal(Object.getPrototypeOf(ee._listeners), null, "should keep the listener table isolated when just calling off()");
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test.same(Object.keys(ee._listeners), [], "should remove all listeners when just calling off()");
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ee.on("a", fn = function(arg1) {
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test.equal(this, ctx, "should be called with this = ctx");
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test.equal(arg1, 1, "should be called with arg1 = 1");
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}, ctx).emit("a", 1);
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ee.off("a", fn);
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test.same(Object.keys(ee._listeners), [ "a" ], "should keep the event key when calling off(evt, fn)");
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test.same(ee._listeners.a, [], "should remove the exact listener when calling off(evt, fn)");
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ee.on("a", function() {
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test.equal(this, ee, "should be called with this = ee");
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}).emit("a");
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test.doesNotThrow(function() {
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ee.off("a", fn);
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}, "should not throw if no such listener is found");
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test.test(test.name + " - special event names", function(test) {
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var ee = new EventEmitter();
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var calls = 0;
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test.doesNotThrow(function() {
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ee.off("__proto__", function() {});
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}, "should not throw when removing an absent special event listener");
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ee.on("__proto__", function(arg) {
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++calls;
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test.equal(arg, 1, "should pass arguments for __proto__ events");
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});
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ee.on("constructor", function(arg) {
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++calls;
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test.equal(arg, 2, "should pass arguments for constructor events");
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});
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ee.emit("__proto__", 1);
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ee.emit("constructor", 2);
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test.equal(calls, 2, "should dispatch special event names");
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test.equal(Object.getPrototypeOf(ee._listeners), null, "should keep the listener table isolated");
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test.ok(Object.prototype.hasOwnProperty.call(ee._listeners, "__proto__"), "should store __proto__ as an own event key");
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test.ok(Object.prototype.hasOwnProperty.call(ee._listeners, "constructor"), "should store constructor as an own event key");
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ee.off("__proto__");
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ee.off("constructor");
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test.same(ee._listeners.__proto__, [], "should clear __proto__ listeners");
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test.same(ee._listeners.constructor, [], "should clear constructor listeners");
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test.end();
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});
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test.end();
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});
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