1 files changed, 119 insertions, 0 deletions
diff --git a/spec/frontend/ci_variable_list/components/legacy_ci_environments_dropdown_spec.js b/spec/frontend/ci_variable_list/components/legacy_ci_environments_dropdown_spec.js
new file mode 100644
index 00000000000..b3e23ba4201
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+++ b/spec/frontend/ci_variable_list/components/legacy_ci_environments_dropdown_spec.js
@@ -0,0 +1,119 @@
+import { GlDropdown, GlDropdownItem, GlIcon } from '@gitlab/ui';
+import { mount } from '@vue/test-utils';
+import Vue, { nextTick } from 'vue';
+import Vuex from 'vuex';
+import LegacyCiEnvironmentsDropdown from '~/ci_variable_list/components/legacy_ci_environments_dropdown.vue';
+
+Vue.use(Vuex);
+
+describe('Ci environments dropdown', () => {
+  let wrapper;
+  let store;
+
+  const enterSearchTerm = (value) =>
+    wrapper.find('[data-testid="ci-environment-search"]').setValue(value);
+
+  const createComponent = (term) => {
+    store = new Vuex.Store({
+      getters: {
+        joinedEnvironments: () => ['dev', 'prod', 'staging'],
+      },
+    });
+
+    wrapper = mount(LegacyCiEnvironmentsDropdown, {
+      store,
+      propsData: {
+        value: term,
+      },
+    });
+    enterSearchTerm(term);
+  };
+
+  const findAllDropdownItems = () => wrapper.findAllComponents(GlDropdownItem);
+  const findDropdownItemByIndex = (index) => wrapper.findAllComponents(GlDropdownItem).at(index);
+  const findActiveIconByIndex = (index) => findDropdownItemByIndex(index).findComponent(GlIcon);
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  describe('No environments found', () => {
+    beforeEach(() => {
+      createComponent('stable');
+    });
+
+    it('renders create button with search term if environments do not contain search term', () => {
+      expect(findAllDropdownItems()).toHaveLength(2);
+      expect(findDropdownItemByIndex(1).text()).toBe('Create wildcard: stable');
+    });
+
+    it('renders empty results message', () => {
+      expect(findDropdownItemByIndex(0).text()).toBe('No matching results');
+    });
+  });
+
+  describe('Search term is empty', () => {
+    beforeEach(() => {
+      createComponent('');
+    });
+
+    it('renders all environments when search term is empty', () => {
+      expect(findAllDropdownItems()).toHaveLength(3);
+      expect(findDropdownItemByIndex(0).text()).toBe('dev');
+      expect(findDropdownItemByIndex(1).text()).toBe('prod');
+      expect(findDropdownItemByIndex(2).text()).toBe('staging');
+    });
+
+    it('should not display active checkmark on the inactive stage', () => {
+      expect(findActiveIconByIndex(0).classes('gl-visibility-hidden')).toBe(true);
+    });
+  });
+
+  describe('Environments found', () => {
+    beforeEach(async () => {
+      createComponent('prod');
+      await nextTick();
+    });
+
+    it('renders only the environment searched for', () => {
+      expect(findAllDropdownItems()).toHaveLength(1);
+      expect(findDropdownItemByIndex(0).text()).toBe('prod');
+    });
+
+    it('should not display create button', () => {
+      const environments = findAllDropdownItems().filter((env) => env.text().startsWith('Create'));
+      expect(environments).toHaveLength(0);
+      expect(findAllDropdownItems()).toHaveLength(1);
+    });
+
+    it('should not display empty results message', () => {
+      expect(wrapper.findComponent({ ref: 'noMatchingResults' }).exists()).toBe(false);
+    });
+
+    it('should display active checkmark if active', () => {
+      expect(findActiveIconByIndex(0).classes('gl-visibility-hidden')).toBe(false);
+    });
+
+    it('should clear the search term when showing the dropdown', () => {
+      wrapper.findComponent(GlDropdown).trigger('click');
+
+      expect(wrapper.find('[data-testid="ci-environment-search"]').text()).toBe('');
+    });
+
+    describe('Custom events', () => {
+      it('should emit selectEnvironment if an environment is clicked', () => {
+        findDropdownItemByIndex(0).vm.$emit('click');
+        expect(wrapper.emitted('selectEnvironment')).toEqual([['prod']]);
+      });
+
+      it('should emit createClicked if an environment is clicked', async () => {
+        createComponent('newscope');
+
+        await nextTick();
+        findDropdownItemByIndex(1).vm.$emit('click');
+        expect(wrapper.emitted('createClicked')).toEqual([['newscope']]);
+      });
+    });
+  });
+});