init project

node_modules/@protobufjs/eventemitter/tests/index.js

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