1 files changed, 102 insertions, 0 deletions
diff --git a/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js b/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js
new file mode 100644
index 00000000000..7f3eea7d2e5
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/mr_widget_header_spec.js
@@ -0,0 +1,102 @@
+import Vue from 'vue';
+import headerComponent from '~/vue_merge_request_widget/components/mr_widget_header';
+
+const createComponent = (mr) => {
+  const Component = Vue.extend(headerComponent);
+  return new Component({
+    el: document.createElement('div'),
+    propsData: { mr },
+  });
+};
+
+describe('MRWidgetHeader', () => {
+  describe('props', () => {
+    it('should have props', () => {
+      const { mr } = headerComponent.props;
+
+      expect(mr.type instanceof Object).toBeTruthy();
+      expect(mr.required).toBeTruthy();
+    });
+  });
+
+  describe('computed', () => {
+    let vm;
+    beforeEach(() => {
+      vm = createComponent({
+        divergedCommitsCount: 12,
+        sourceBranch: 'mr-widget-refactor',
+        sourceBranchLink: '/foo/bar/mr-widget-refactor',
+        targetBranch: 'master',
+      });
+    });
+
+    it('shouldShowCommitsBehindText', () => {
+      expect(vm.shouldShowCommitsBehindText).toBeTruthy();
+
+      vm.mr.divergedCommitsCount = 0;
+      expect(vm.shouldShowCommitsBehindText).toBeFalsy();
+    });
+
+    it('commitsText', () => {
+      expect(vm.commitsText).toEqual('commits');
+
+      vm.mr.divergedCommitsCount = 1;
+      expect(vm.commitsText).toEqual('commit');
+    });
+  });
+
+  describe('template', () => {
+    let vm;
+    let el;
+    const sourceBranchPath = '/foo/bar/mr-widget-refactor';
+    const mr = {
+      divergedCommitsCount: 12,
+      sourceBranch: 'mr-widget-refactor',
+      sourceBranchLink: `<a href="${sourceBranchPath}">mr-widget-refactor</a>`,
+      targetBranchPath: 'foo/bar/commits-path',
+      targetBranch: 'master',
+      isOpen: true,
+      emailPatchesPath: '/mr/email-patches',
+      plainDiffPath: '/mr/plainDiffPath',
+    };
+
+    beforeEach(() => {
+      vm = createComponent(mr);
+      el = vm.$el;
+    });
+
+    it('should render template elements correctly', () => {
+      expect(el.classList.contains('mr-source-target')).toBeTruthy();
+      const sourceBranchLink = el.querySelectorAll('.label-branch')[0];
+      const targetBranchLink = el.querySelectorAll('.label-branch')[1];
+
+      expect(sourceBranchLink.textContent).toContain(mr.sourceBranch);
+      expect(targetBranchLink.textContent).toContain(mr.targetBranch);
+      expect(sourceBranchLink.querySelector('a').getAttribute('href')).toEqual(sourceBranchPath);
+      expect(targetBranchLink.querySelector('a').getAttribute('href')).toEqual(mr.targetBranchPath);
+      expect(el.querySelector('.diverged-commits-count').textContent).toContain('12 commits behind');
+
+      expect(el.textContent).toContain('Check out branch');
+      expect(el.querySelectorAll('.dropdown li a')[0].getAttribute('href')).toEqual(mr.emailPatchesPath);
+      expect(el.querySelectorAll('.dropdown li a')[1].getAttribute('href')).toEqual(mr.plainDiffPath);
+    });
+
+    it('should not have right action links if the MR state is not open', (done) => {
+      vm.mr.isOpen = false;
+      Vue.nextTick(() => {
+        expect(el.textContent).not.toContain('Check out branch');
+        expect(el.querySelectorAll('.dropdown li a').length).toEqual(0);
+        done();
+      });
+    });
+
+    it('should not render diverged commits count if the MR has no diverged commits', (done) => {
+      vm.mr.divergedCommitsCount = null;
+      Vue.nextTick(() => {
+        expect(el.textContent).not.toContain('commits behind');
+        expect(el.querySelectorAll('.diverged-commits-count').length).toEqual(0);
+        done();
+      });
+    });
+  });
+});