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55 lines
1.5 KiB
55 lines
1.5 KiB
require("../common");
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var events = require('events');
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var callbacks_called = [ ];
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var e = new events.EventEmitter();
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function callback1() {
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callbacks_called.push("callback1");
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e.addListener("foo", callback2);
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e.addListener("foo", callback3);
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e.removeListener("foo", callback1);
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}
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function callback2() {
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callbacks_called.push("callback2");
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e.removeListener("foo", callback2);
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}
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function callback3() {
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callbacks_called.push("callback3");
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e.removeListener("foo", callback3);
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}
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e.addListener("foo", callback1);
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assert.equal(1, e.listeners("foo").length);
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e.emit("foo");
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assert.equal(2, e.listeners("foo").length);
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assert.deepEqual(["callback1"], callbacks_called);
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e.emit("foo");
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assert.equal(0, e.listeners("foo").length);
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assert.deepEqual(["callback1", "callback2", "callback3"], callbacks_called);
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e.emit("foo");
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assert.equal(0, e.listeners("foo").length);
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assert.deepEqual(["callback1", "callback2", "callback3"], callbacks_called);
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e.addListener("foo", callback1);
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e.addListener("foo", callback2);
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assert.equal(2, e.listeners("foo").length)
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e.removeAllListeners("foo")
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assert.equal(0, e.listeners("foo").length)
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// Verify that removing callbacks while in emit allows emits to propagate to
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// all listeners
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callbacks_called = [ ];
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e.addListener("foo", callback2);
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e.addListener("foo", callback3);
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assert.equal(2, e.listeners("foo").length)
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e.emit("foo");
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assert.deepEqual(["callback2", "callback3"], callbacks_called);
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assert.equal(0, e.listeners("foo").length)
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