1 files changed, 63 insertions, 0 deletions
diff --git a/spec/javascripts/ide/components/nav_dropdown_button_spec.js b/spec/javascripts/ide/components/nav_dropdown_button_spec.js
new file mode 100644
index 00000000000..0a58e260280
--- /dev/null
+++ b/spec/javascripts/ide/components/nav_dropdown_button_spec.js
@@ -0,0 +1,63 @@
+import Vue from 'vue';
+import NavDropdownButton from '~/ide/components/nav_dropdown_button.vue';
+import store from '~/ide/stores';
+import { trimText } from 'spec/helpers/vue_component_helper';
+import { mountComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
+import { resetStore } from '../helpers';
+
+describe('NavDropdown', () => {
+  const TEST_BRANCH_ID = 'lorem-ipsum-dolar';
+  const TEST_MR_ID = '12345';
+  const Component = Vue.extend(NavDropdownButton);
+  let vm;
+
+  beforeEach(() => {
+    vm = mountComponentWithStore(Component, { store });
+
+    vm.$mount();
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+
+    resetStore(store);
+  });
+
+  it('renders empty placeholders, if state is falsey', () => {
+    expect(trimText(vm.$el.textContent)).toEqual('- -');
+  });
+
+  it('renders branch name, if state has currentBranchId', done => {
+    vm.$store.state.currentBranchId = TEST_BRANCH_ID;
+
+    vm.$nextTick()
+      .then(() => {
+        expect(trimText(vm.$el.textContent)).toEqual(`${TEST_BRANCH_ID} -`);
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  it('renders mr id, if state has currentMergeRequestId', done => {
+    vm.$store.state.currentMergeRequestId = TEST_MR_ID;
+
+    vm.$nextTick()
+      .then(() => {
+        expect(trimText(vm.$el.textContent)).toEqual(`- !${TEST_MR_ID}`);
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  it('renders branch and mr, if state has both', done => {
+    vm.$store.state.currentBranchId = TEST_BRANCH_ID;
+    vm.$store.state.currentMergeRequestId = TEST_MR_ID;
+
+    vm.$nextTick()
+      .then(() => {
+        expect(trimText(vm.$el.textContent)).toEqual(`${TEST_BRANCH_ID} !${TEST_MR_ID}`);
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+});