1 files changed, 114 insertions, 0 deletions
diff --git a/spec/frontend/design_management/components/upload/design_version_dropdown_spec.js b/spec/frontend/design_management/components/upload/design_version_dropdown_spec.js
new file mode 100644
index 00000000000..7521b9fad2a
--- /dev/null
+++ b/spec/frontend/design_management/components/upload/design_version_dropdown_spec.js
@@ -0,0 +1,114 @@
+import { shallowMount } from '@vue/test-utils';
+import DesignVersionDropdown from '~/design_management/components/upload/design_version_dropdown.vue';
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import mockAllVersions from './mock_data/all_versions';
+
+const LATEST_VERSION_ID = 3;
+const PREVIOUS_VERSION_ID = 2;
+
+const designRouteFactory = versionId => ({
+  path: `/designs?version=${versionId}`,
+  query: {
+    version: `${versionId}`,
+  },
+});
+
+const MOCK_ROUTE = {
+  path: '/designs',
+  query: {},
+};
+
+describe('Design management design version dropdown component', () => {
+  let wrapper;
+
+  function createComponent({ maxVersions = -1, $route = MOCK_ROUTE } = {}) {
+    wrapper = shallowMount(DesignVersionDropdown, {
+      propsData: {
+        projectPath: '',
+        issueIid: '',
+      },
+      mocks: {
+        $route,
+      },
+      stubs: ['router-link'],
+    });
+
+    wrapper.setData({
+      allVersions: maxVersions > -1 ? mockAllVersions.slice(0, maxVersions) : mockAllVersions,
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const findVersionLink = index => wrapper.findAll('.js-version-link').at(index);
+
+  it('renders design version dropdown button', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('renders design version list', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('selected version name', () => {
+    it('has "latest" on most recent version item', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findVersionLink(0).text()).toContain('latest');
+      });
+    });
+  });
+
+  describe('versions list', () => {
+    it('displays latest version text by default', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('displays latest version text when only 1 version is present', () => {
+      createComponent({ maxVersions: 1 });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('displays version text when the current version is not the latest', () => {
+      createComponent({ $route: designRouteFactory(PREVIOUS_VERSION_ID) });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe(`Showing Version #1`);
+      });
+    });
+
+    it('displays latest version text when the current version is the latest', () => {
+      createComponent({ $route: designRouteFactory(LATEST_VERSION_ID) });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('should have the same length as apollo query', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.findAll(GlDropdownItem)).toHaveLength(wrapper.vm.allVersions.length);
+      });
+    });
+  });
+});