1 files changed, 35 insertions, 0 deletions
diff --git a/spec/frontend/ci/job_details/components/log/line_number_spec.js b/spec/frontend/ci/job_details/components/log/line_number_spec.js
new file mode 100644
index 00000000000..d5c1d0fd985
--- /dev/null
+++ b/spec/frontend/ci/job_details/components/log/line_number_spec.js
@@ -0,0 +1,35 @@
+import { shallowMount } from '@vue/test-utils';
+import LineNumber from '~/ci/job_details/components/log/line_number.vue';
+
+describe('Job Log Line Number', () => {
+  let wrapper;
+
+  const data = {
+    lineNumber: 0,
+    path: '/jashkenas/underscore/-/jobs/335',
+  };
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(LineNumber, {
+      propsData: {
+        ...props,
+      },
+    });
+  };
+
+  beforeEach(() => {
+    createComponent(data);
+  });
+
+  it('renders incremented lineNunber by 1', () => {
+    expect(wrapper.text()).toBe('1');
+  });
+
+  it('renders link with lineNumber as an ID', () => {
+    expect(wrapper.attributes().id).toBe('L1');
+  });
+
+  it('links to the provided path with line number as anchor', () => {
+    expect(wrapper.attributes().href).toBe(`${data.path}#L1`);
+  });
+});