1 files changed, 89 insertions, 0 deletions
diff --git a/spec/frontend/branches/components/graph_bar_spec.js b/spec/frontend/branches/components/graph_bar_spec.js
new file mode 100644
index 00000000000..61c051b49c6
--- /dev/null
+++ b/spec/frontend/branches/components/graph_bar_spec.js
@@ -0,0 +1,89 @@
+import { shallowMount } from '@vue/test-utils';
+import GraphBar from '~/branches/components/graph_bar.vue';
+
+let vm;
+
+function factory(propsData = {}) {
+  vm = shallowMount(GraphBar, { propsData });
+}
+
+describe('Branch divergence graph bar component', () => {
+  afterEach(() => {
+    vm.destroy();
+  });
+
+  it.each`
+    position   | positionClass
+    ${'left'}  | ${'position-right-0'}
+    ${'right'} | ${'position-left-0'}
+    ${'full'}  | ${'position-left-0'}
+  `(
+    'sets position class as $positionClass for position $position',
+    ({ position, positionClass }) => {
+      factory({
+        position,
+        count: 10,
+        maxCommits: 100,
+      });
+
+      expect(vm.find('.js-graph-bar').classes()).toContain(positionClass);
+    },
+  );
+
+  it.each`
+    position   | textAlignmentClass
+    ${'left'}  | ${'text-right'}
+    ${'right'} | ${'text-left'}
+    ${'full'}  | ${'text-center'}
+  `(
+    'sets text alignment class as $textAlignmentClass for position $position',
+    ({ position, textAlignmentClass }) => {
+      factory({
+        position,
+        count: 10,
+        maxCommits: 100,
+      });
+
+      expect(vm.find('.js-graph-count').classes()).toContain(textAlignmentClass);
+    },
+  );
+
+  it.each`
+    position   | roundedClass
+    ${'left'}  | ${'rounded-left'}
+    ${'right'} | ${'rounded-right'}
+    ${'full'}  | ${'rounded'}
+  `('sets rounded class as $roundedClass for position $position', ({ position, roundedClass }) => {
+    factory({
+      position,
+      count: 10,
+      maxCommits: 100,
+    });
+
+    expect(vm.find('.js-graph-bar').classes()).toContain(roundedClass);
+  });
+
+  it.each`
+    count   | label
+    ${100}  | ${'100'}
+    ${1000} | ${'999+'}
+  `('renders label as $roundedClass for $count', ({ count, label }) => {
+    factory({
+      position: 'left',
+      count,
+      maxCommits: 1000,
+    });
+
+    expect(vm.find('.js-graph-count').text()).toContain(label);
+  });
+
+  it('sets width of bar', () => {
+    factory({
+      position: 'left',
+      count: 100,
+      maxCommits: 1000,
+    });
+
+    expect(vm.find('.js-graph-bar').attributes('style')).toEqual('width: 10%;');
+  });
+});