1 files changed, 40 insertions, 0 deletions
diff --git a/spec/frontend/behaviors/components/diagram_performance_warning_spec.js b/spec/frontend/behaviors/components/diagram_performance_warning_spec.js
new file mode 100644
index 00000000000..c58c2bc55a9
--- /dev/null
+++ b/spec/frontend/behaviors/components/diagram_performance_warning_spec.js
@@ -0,0 +1,40 @@
+import { GlAlert } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import DiagramPerformanceWarning from '~/behaviors/components/diagram_performance_warning.vue';
+
+describe('DiagramPerformanceWarning component', () => {
+  let wrapper;
+
+  const findAlert = () => wrapper.findComponent(GlAlert);
+
+  beforeEach(() => {
+    wrapper = shallowMount(DiagramPerformanceWarning);
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders warning alert with button', () => {
+    expect(findAlert().props()).toMatchObject({
+      primaryButtonText: DiagramPerformanceWarning.i18n.buttonText,
+      variant: 'warning',
+    });
+  });
+
+  it('renders warning message', () => {
+    expect(findAlert().text()).toBe(DiagramPerformanceWarning.i18n.bodyText);
+  });
+
+  it('emits event when closing alert', () => {
+    findAlert().vm.$emit('dismiss');
+
+    expect(wrapper.emitted('closeAlert')).toEqual([[]]);
+  });
+
+  it('emits event when accepting alert', () => {
+    findAlert().vm.$emit('primaryAction');
+
+    expect(wrapper.emitted('showImage')).toEqual([[]]);
+  });
+});