1 files changed, 143 insertions, 0 deletions
diff --git a/spec/frontend/boards/components/sidebar/board_sidebar_labels_select_spec.js b/spec/frontend/boards/components/sidebar/board_sidebar_labels_select_spec.js
new file mode 100644
index 00000000000..da000d21f6a
--- /dev/null
+++ b/spec/frontend/boards/components/sidebar/board_sidebar_labels_select_spec.js
@@ -0,0 +1,143 @@
+import { shallowMount } from '@vue/test-utils';
+import { GlLabel } from '@gitlab/ui';
+import { TEST_HOST } from 'helpers/test_constants';
+import { labels as TEST_LABELS, mockIssue as TEST_ISSUE } from 'jest/boards/mock_data';
+import BoardSidebarLabelsSelect from '~/boards/components/sidebar/board_sidebar_labels_select.vue';
+import BoardEditableItem from '~/boards/components/sidebar/board_editable_item.vue';
+import { getIdFromGraphQLId } from '~/graphql_shared/utils';
+import { createStore } from '~/boards/stores';
+import createFlash from '~/flash';
+
+jest.mock('~/flash');
+
+const TEST_LABELS_PAYLOAD = TEST_LABELS.map(label => ({ ...label, set: true }));
+const TEST_LABELS_TITLES = TEST_LABELS.map(label => label.title);
+
+describe('~/boards/components/sidebar/board_sidebar_labels_select.vue', () => {
+  let wrapper;
+  let store;
+
+  afterEach(() => {
+    wrapper.destroy();
+    store = null;
+    wrapper = null;
+  });
+
+  const createWrapper = ({ labels = [] } = {}) => {
+    store = createStore();
+    store.state.issues = { [TEST_ISSUE.id]: { ...TEST_ISSUE, labels } };
+    store.state.activeId = TEST_ISSUE.id;
+
+    wrapper = shallowMount(BoardSidebarLabelsSelect, {
+      store,
+      provide: {
+        canUpdate: true,
+        labelsFetchPath: TEST_HOST,
+        labelsManagePath: TEST_HOST,
+        labelsFilterBasePath: TEST_HOST,
+      },
+      stubs: {
+        'board-editable-item': BoardEditableItem,
+        'labels-select': '<div></div>',
+      },
+    });
+  };
+
+  const findLabelsSelect = () => wrapper.find({ ref: 'labelsSelect' });
+  const findLabelsTitles = () => wrapper.findAll(GlLabel).wrappers.map(item => item.props('title'));
+  const findCollapsed = () => wrapper.find('[data-testid="collapsed-content"]');
+
+  it('renders "None" when no labels are selected', () => {
+    createWrapper();
+
+    expect(findCollapsed().text()).toBe('None');
+  });
+
+  it('renders labels when set', () => {
+    createWrapper({ labels: TEST_LABELS });
+
+    expect(findLabelsTitles()).toEqual(TEST_LABELS_TITLES);
+  });
+
+  describe('when labels are submitted', () => {
+    beforeEach(async () => {
+      createWrapper();
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueLabels').mockImplementation(() => TEST_LABELS);
+      findLabelsSelect().vm.$emit('updateSelectedLabels', TEST_LABELS_PAYLOAD);
+      store.state.issues[TEST_ISSUE.id].labels = TEST_LABELS;
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders labels', () => {
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findLabelsTitles()).toEqual(TEST_LABELS_TITLES);
+    });
+
+    it('commits change to the server', () => {
+      expect(wrapper.vm.setActiveIssueLabels).toHaveBeenCalledWith({
+        addLabelIds: TEST_LABELS.map(label => label.id),
+        projectPath: 'gitlab-org/test-subgroup/gitlab-test',
+        removeLabelIds: [],
+      });
+    });
+  });
+
+  describe('when labels are updated over existing labels', () => {
+    const testLabelsPayload = [{ id: 5, set: true }, { id: 7, set: true }];
+    const expectedLabels = [{ id: 5 }, { id: 7 }];
+
+    beforeEach(async () => {
+      createWrapper({ labels: TEST_LABELS });
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueLabels').mockImplementation(() => expectedLabels);
+      findLabelsSelect().vm.$emit('updateSelectedLabels', testLabelsPayload);
+      await wrapper.vm.$nextTick();
+    });
+
+    it('commits change to the server', () => {
+      expect(wrapper.vm.setActiveIssueLabels).toHaveBeenCalledWith({
+        addLabelIds: [5, 7],
+        removeLabelIds: [6],
+        projectPath: 'gitlab-org/test-subgroup/gitlab-test',
+      });
+    });
+  });
+
+  describe('when removing individual labels', () => {
+    const testLabel = TEST_LABELS[0];
+
+    beforeEach(async () => {
+      createWrapper({ labels: [testLabel] });
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueLabels').mockImplementation(() => {});
+    });
+
+    it('commits change to the server', () => {
+      wrapper.find(GlLabel).vm.$emit('close', testLabel);
+
+      expect(wrapper.vm.setActiveIssueLabels).toHaveBeenCalledWith({
+        removeLabelIds: [getIdFromGraphQLId(testLabel.id)],
+        projectPath: 'gitlab-org/test-subgroup/gitlab-test',
+      });
+    });
+  });
+
+  describe('when the mutation fails', () => {
+    beforeEach(async () => {
+      createWrapper({ labels: TEST_LABELS });
+
+      jest.spyOn(wrapper.vm, 'setActiveIssueLabels').mockImplementation(() => {
+        throw new Error(['failed mutation']);
+      });
+      findLabelsSelect().vm.$emit('updateSelectedLabels', [{ id: '?' }]);
+      await wrapper.vm.$nextTick();
+    });
+
+    it('collapses sidebar and renders former issue weight', () => {
+      expect(findCollapsed().isVisible()).toBe(true);
+      expect(findLabelsTitles()).toEqual(TEST_LABELS_TITLES);
+      expect(createFlash).toHaveBeenCalled();
+    });
+  });
+});