1 files changed, 63 insertions, 0 deletions
diff --git a/spec/javascripts/subbable_resource_spec.js b/spec/javascripts/subbable_resource_spec.js
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+++ b/spec/javascripts/subbable_resource_spec.js
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+/* eslint-disable max-len, arrow-parens, comma-dangle */
+
+require('~/subbable_resource');
+
+/*
+* Test that each rest verb calls the publish and subscribe function and passes the correct value back
+*
+*
+* */
+((global) => {
+  describe('Subbable Resource', function () {
+    describe('PubSub', function () {
+      beforeEach(function () {
+        this.MockResource = new global.SubbableResource('https://example.com');
+      });
+      it('should successfully add a single subscriber', function () {
+        const callback = () => {};
+        this.MockResource.subscribe(callback);
+
+        expect(this.MockResource.subscribers.length).toBe(1);
+        expect(this.MockResource.subscribers[0]).toBe(callback);
+      });
+
+      it('should successfully add multiple subscribers', function () {
+        const callbackOne = () => {};
+        const callbackTwo = () => {};
+        const callbackThree = () => {};
+
+        this.MockResource.subscribe(callbackOne);
+        this.MockResource.subscribe(callbackTwo);
+        this.MockResource.subscribe(callbackThree);
+
+        expect(this.MockResource.subscribers.length).toBe(3);
+      });
+
+      it('should successfully publish an update to a single subscriber', function () {
+        const state = { myprop: 1 };
+
+        const callbacks = {
+          one: (data) => expect(data.myprop).toBe(2),
+          two: (data) => expect(data.myprop).toBe(2),
+          three: (data) => expect(data.myprop).toBe(2)
+        };
+
+        const spyOne = spyOn(callbacks, 'one');
+        const spyTwo = spyOn(callbacks, 'two');
+        const spyThree = spyOn(callbacks, 'three');
+
+        this.MockResource.subscribe(callbacks.one);
+        this.MockResource.subscribe(callbacks.two);
+        this.MockResource.subscribe(callbacks.three);
+
+        state.myprop += 1;
+
+        this.MockResource.publish(state);
+
+        expect(spyOne).toHaveBeenCalled();
+        expect(spyTwo).toHaveBeenCalled();
+        expect(spyThree).toHaveBeenCalled();
+      });
+    });
+  });
+})(window.gl || (window.gl = {}));