1 files changed, 137 insertions, 0 deletions
diff --git a/spec/frontend/boards/components/sidebar/board_sidebar_due_date_spec.js b/spec/frontend/boards/components/sidebar/board_sidebar_due_date_spec.js
new file mode 100644
index 00000000000..b034c8cb11d
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+++ b/spec/frontend/boards/components/sidebar/board_sidebar_due_date_spec.js
@@ -0,0 +1,137 @@
+import { shallowMount } from '@vue/test-utils';
+import { GlDatepicker } from '@gitlab/ui';
+import BoardSidebarDueDate from '~/boards/components/sidebar/board_sidebar_due_date.vue';
+import BoardEditableItem from '~/boards/components/sidebar/board_editable_item.vue';
+import { createStore } from '~/boards/stores';
+import createFlash from '~/flash';
+
+const TEST_DUE_DATE = '2020-02-20';
+const TEST_FORMATTED_DUE_DATE = 'Feb 20, 2020';
+const TEST_PARSED_DATE = new Date(2020, 1, 20);
+const TEST_ISSUE = { id: 'gid://gitlab/Issue/1', iid: 9, dueDate: null, referencePath: 'h/b#2' };
+
+jest.mock('~/flash');
+
+describe('~/boards/components/sidebar/board_sidebar_due_date.vue', () => {
+  let wrapper;
+  let store;
+
+  afterEach(() => {
+    wrapper.destroy();
+    store = null;
+    wrapper = null;
+  });
+
+  const createWrapper = ({ dueDate = null } = {}) => {
+    store = createStore();
+    store.state.issues = { [TEST_ISSUE.id]: { ...TEST_ISSUE, dueDate } };
+    store.state.activeId = TEST_ISSUE.id;
+
+    wrapper = shallowMount(BoardSidebarDueDate, {
+      store,
+      provide: {
+        canUpdate: true,
+      },
+      stubs: {
+        'board-editable-item': BoardEditableItem,
+      },
+    });
+  };
+
+  const findDatePicker = () => wrapper.find(GlDatepicker);
+  const findResetButton = () => wrapper.find('[data-testid="reset-button"]');
+  const findCollapsed = () => wrapper.find('[data-testid="collapsed-content"]');
+
+  it('renders "None" when no due date is set', () => {
+    createWrapper();
+
+    expect(findCollapsed().text()).toBe('None');
+    expect(findResetButton().exists()).toBe(false);
+  });
+
+  it('renders formatted due date with reset button when set', () => {
+    createWrapper({ dueDate: TEST_DUE_DATE });
+
+    expect(findCollapsed().text()).toContain(TEST_FORMATTED_DUE_DATE);
+    expect(findResetButton().exists()).toBe(true);
+  });
+
+  describe('when due date is submitted', () => {
+    beforeEach(async () => {
+      createWrapper();
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueDueDate').mockImplementation(() => {
+        store.state.issues[TEST_ISSUE.id].dueDate = TEST_DUE_DATE;
+      });
+      findDatePicker().vm.$emit('input', TEST_PARSED_DATE);
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders formatted due date with reset button', () => {
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findCollapsed().text()).toContain(TEST_FORMATTED_DUE_DATE);
+      expect(findResetButton().exists()).toBe(true);
+    });
+
+    it('commits change to the server', () => {
+      expect(wrapper.vm.setActiveIssueDueDate).toHaveBeenCalledWith({
+        dueDate: TEST_DUE_DATE,
+        projectPath: 'h/b',
+      });
+    });
+  });
+
+  describe('when due date is cleared', () => {
+    beforeEach(async () => {
+      createWrapper();
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueDueDate').mockImplementation(() => {
+        store.state.issues[TEST_ISSUE.id].dueDate = null;
+      });
+      findDatePicker().vm.$emit('clear');
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders "None"', () => {
+      expect(wrapper.vm.setActiveIssueDueDate).toHaveBeenCalled();
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findCollapsed().text()).toBe('None');
+    });
+  });
+
+  describe('when due date is resetted', () => {
+    beforeEach(async () => {
+      createWrapper({ dueDate: TEST_DUE_DATE });
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueDueDate').mockImplementation(() => {
+        store.state.issues[TEST_ISSUE.id].dueDate = null;
+      });
+      findResetButton().vm.$emit('click');
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders "None"', () => {
+      expect(wrapper.vm.setActiveIssueDueDate).toHaveBeenCalled();
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findCollapsed().text()).toBe('None');
+    });
+  });
+
+  describe('when the mutation fails', () => {
+    beforeEach(async () => {
+      createWrapper({ dueDate: TEST_DUE_DATE });
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueDueDate').mockImplementation(() => {
+        throw new Error(['failed mutation']);
+      });
+      findDatePicker().vm.$emit('input', 'Invalid date');
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders former issue due date', () => {
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findCollapsed().text()).toContain(TEST_FORMATTED_DUE_DATE);
+      expect(createFlash).toHaveBeenCalled();
+    });
+  });
+});