1 files changed, 65 insertions, 0 deletions
diff --git a/spec/frontend/vue_mr_widget/components/mr_widget_expandable_section_spec.js b/spec/frontend/vue_mr_widget/components/mr_widget_expandable_section_spec.js
new file mode 100644
index 00000000000..69a50899d4d
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+++ b/spec/frontend/vue_mr_widget/components/mr_widget_expandable_section_spec.js
@@ -0,0 +1,65 @@
+import { GlButton, GlCollapse, GlIcon } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import MrCollapsibleSection from '~/vue_merge_request_widget/components/mr_widget_expandable_section.vue';
+
+describe('MrWidgetExpanableSection', () => {
+  let wrapper;
+
+  const findButton = () => wrapper.find(GlButton);
+  const findCollapse = () => wrapper.find(GlCollapse);
+
+  beforeEach(() => {
+    wrapper = shallowMount(MrCollapsibleSection, {
+      slots: {
+        content: '<span>Collapsable Content</span>',
+        header: '<span>Header Content</span>',
+      },
+    });
+  });
+
+  it('renders Icon', () => {
+    expect(wrapper.contains(GlIcon)).toBe(true);
+  });
+
+  it('renders header slot', () => {
+    expect(wrapper.text()).toContain('Header Content');
+  });
+
+  it('renders content slot', () => {
+    expect(wrapper.text()).toContain('Collapsable Content');
+  });
+
+  describe('when collapse section is closed', () => {
+    it('renders button with expand text', () => {
+      expect(findButton().text()).toBe('Expand');
+    });
+
+    it('renders a collpased section with no visibility', () => {
+      const collapse = findCollapse();
+
+      expect(collapse.exists()).toBe(true);
+      expect(collapse.attributes('visible')).toBeUndefined();
+    });
+  });
+
+  describe('when collapse section is open', () => {
+    beforeEach(() => {
+      findButton().vm.$emit('click');
+      return wrapper.vm.$nextTick();
+    });
+
+    it('renders button with collapse text', () => {
+      const button = findButton();
+
+      expect(button.exists()).toBe(true);
+      expect(button.text()).toBe('Collapse');
+    });
+
+    it('renders a collpased section with visible content', () => {
+      const collapse = findCollapse();
+
+      expect(collapse.exists()).toBe(true);
+      expect(collapse.attributes('visible')).toBe('true');
+    });
+  });
+});