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node_modules/@fluentui/utilities/lib/appendFunction.test.js

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+import { appendFunction } from './appendFunction';
+describe('appendFunction', function () {
+    it('can append 2 functions', function () {
+        var counter = 0;
+        var function1 = function () { return counter++; };
+        var function2 = function () { return counter++; };
+        var function3 = appendFunction({}, function1, function2);
+        function3();
+        expect(counter).toEqual(2);
+    });
+    it('can deal with falsey values', function () {
+        var counter = 0;
+        var function1 = function () { return counter++; };
+        var function2 = function () { return counter++; };
+        var function3 = appendFunction({}, function1, undefined, null, function2);
+        function3();
+        expect(counter).toEqual(2);
+    });
+    it('preserves the parent', function () {
+        function add() {
+            this.counter++;
+        }
+        var Foo = /** @class */ (function () {
+            function Foo() {
+                this.counter = 0;
+                this.add = appendFunction(this, add, this.add);
+            }
+            Foo.prototype.add = function () {
+                this.counter++;
+            };
+            return Foo;
+        }());
+        var foo = new Foo();
+        foo.add();
+        expect(foo.counter).toEqual(2);
+    });
+});
+//# sourceMappingURL=appendFunction.test.js.map