1 files changed, 77 insertions, 0 deletions
diff --git a/spec/javascripts/vue_shared/components/gl_countdown_spec.js b/spec/javascripts/vue_shared/components/gl_countdown_spec.js
new file mode 100644
index 00000000000..929ffe219f4
--- /dev/null
+++ b/spec/javascripts/vue_shared/components/gl_countdown_spec.js
@@ -0,0 +1,77 @@
+import mountComponent from 'spec/helpers/vue_mount_component_helper';
+import Vue from 'vue';
+import GlCountdown from '~/vue_shared/components/gl_countdown.vue';
+
+describe('GlCountdown', () => {
+  const Component = Vue.extend(GlCountdown);
+  let vm;
+  let now = '2000-01-01T00:00:00Z';
+
+  beforeEach(() => {
+    spyOn(Date, 'now').and.callFake(() => new Date(now).getTime());
+    jasmine.clock().install();
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+    jasmine.clock().uninstall();
+  });
+
+  describe('when there is time remaining', () => {
+    beforeEach(done => {
+      vm = mountComponent(Component, {
+        endDateString: '2000-01-01T01:02:03Z',
+      });
+
+      Vue.nextTick()
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('displays remaining time', () => {
+      expect(vm.$el).toContainText('01:02:03');
+    });
+
+    it('updates remaining time', done => {
+      now = '2000-01-01T00:00:01Z';
+      jasmine.clock().tick(1000);
+
+      Vue.nextTick()
+        .then(() => {
+          expect(vm.$el).toContainText('01:02:02');
+          done();
+        })
+        .catch(done.fail);
+    });
+  });
+
+  describe('when there is no time remaining', () => {
+    beforeEach(done => {
+      vm = mountComponent(Component, {
+        endDateString: '1900-01-01T00:00:00Z',
+      });
+
+      Vue.nextTick()
+        .then(done)
+        .catch(done.fail);
+    });
+
+    it('displays 00:00:00', () => {
+      expect(vm.$el).toContainText('00:00:00');
+    });
+  });
+
+  describe('when an invalid date is passed', () => {
+    it('throws a validation error', () => {
+      spyOn(Vue.config, 'warnHandler').and.stub();
+      vm = mountComponent(Component, {
+        endDateString: 'this is invalid',
+      });
+
+      expect(Vue.config.warnHandler).toHaveBeenCalledTimes(1);
+      const [errorMessage] = Vue.config.warnHandler.calls.argsFor(0);
+
+      expect(errorMessage).toMatch(/^Invalid prop: .* "endDateString"/);
+    });
+  });
+});