Adds tests and changes after review

1 files changed, 125 insertions, 0 deletions

diff --git a/spec/javascripts/lib/utils/poll_spec.js b/spec/javascripts/lib/utils/poll_spec.js
new file mode 100644
index 00000000000..3e009c9599a
--- /dev/null
+++ b/spec/javascripts/lib/utils/poll_spec.js
@@ -0,0 +1,125 @@
+import Vue from 'vue';
+import VueResource from 'vue-resource';
+import Poll from '~/lib/utils/poll';
+
+Vue.use(VueResource);
+
+class ServiceMock {
+  constructor(endpoint) {
+    this.service = Vue.resource(endpoint);
+  }
+
+  fetch() {
+    return this.service.get();
+  }
+}
+
+describe('Poll', () => {
+  let callbacks;
+
+  beforeEach(() => {
+    callbacks = {
+      success: () => {},
+      error: () => {},
+    };
+
+    spyOn(callbacks, 'success');
+    spyOn(callbacks, 'error');
+  });
+
+  it('calls the success callback when no header for interval is provided', (done) => {
+    const successInterceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify([]), { status: 200 }));
+    };
+
+    Vue.http.interceptors.push(successInterceptor);
+
+    new Poll({
+      resource: new ServiceMock('endpoint'),
+      method: 'fetch',
+      successCallback: callbacks.success,
+      errorCallback: callbacks.error,
+    }).makeRequest();
+
+    setTimeout(() => {
+      expect(callbacks.success).toHaveBeenCalled();
+      expect(callbacks.error).not.toHaveBeenCalled();
+      done();
+    }, 0);
+
+    Vue.http.interceptors = _.without(Vue.http.interceptors, successInterceptor);
+  });
+
+  it('calls the error callback whe the http request returns an error', (done) => {
+    const errorInterceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify([]), { status: 500 }));
+    };
+
+    Vue.http.interceptors.push(errorInterceptor);
+
+    new Poll({
+      resource: new ServiceMock('endpoint'),
+      method: 'fetch',
+      successCallback: callbacks.success,
+      errorCallback: callbacks.error,
+    }).makeRequest();
+
+    setTimeout(() => {
+      expect(callbacks.success).not.toHaveBeenCalled();
+      expect(callbacks.error).toHaveBeenCalled();
+      done();
+    }, 0);
+
+    Vue.http.interceptors = _.without(Vue.http.interceptors, errorInterceptor);
+  });
+
+  it('should call the success callback when the interval header is -1', (done) => {
+    const intervalInterceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify([]), { status: 200, headers: { 'poll-interval': -1 } }));
+    };
+
+    Vue.http.interceptors.push(intervalInterceptor);
+
+    new Poll({
+      resource: new ServiceMock('endpoint'),
+      method: 'fetch',
+      successCallback: callbacks.success,
+      errorCallback: callbacks.error,
+    }).makeRequest();
+
+    setTimeout(() => {
+      expect(callbacks.success).toHaveBeenCalled();
+      expect(callbacks.error).not.toHaveBeenCalled();
+      done();
+    }, 0);
+
+    Vue.http.interceptors = _.without(Vue.http.interceptors, intervalInterceptor);
+  });
+
+  it('starts polling when http status is 200 and interval header is provided', (done) => {
+    const pollInterceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify([]), { status: 200, headers: { 'poll-interval': 2 } }));
+    };
+
+    Vue.http.interceptors.push(pollInterceptor);
+
+    const service = new ServiceMock('endpoint');
+    spyOn(service, 'fetch').and.callThrough();
+
+    new Poll({
+      resource: service,
+      method: 'fetch',
+      successCallback: callbacks.success,
+      errorCallback: callbacks.error,
+    }).makeRequest();
+
+    setTimeout(() => {
+      expect(service.fetch.calls.count()).toEqual(2);
+      expect(callbacks.success).toHaveBeenCalled();
+      expect(callbacks.error).not.toHaveBeenCalled();
+      done();
+    }, 5);
+
+    Vue.http.interceptors = _.without(Vue.http.interceptors, pollInterceptor);
+  });
+});