1 files changed, 102 insertions, 0 deletions
diff --git a/spec/frontend/vue_shared/components/markdown/suggestions_spec.js b/spec/frontend/vue_shared/components/markdown/suggestions_spec.js
new file mode 100644
index 00000000000..34ccdf38b00
--- /dev/null
+++ b/spec/frontend/vue_shared/components/markdown/suggestions_spec.js
@@ -0,0 +1,102 @@
+import Vue from 'vue';
+import SuggestionsComponent from '~/vue_shared/components/markdown/suggestions.vue';
+
+const MOCK_DATA = {
+  suggestions: [
+    {
+      id: 1,
+      appliable: true,
+      applied: false,
+      current_user: {
+        can_apply: true,
+      },
+      diff_lines: [
+        {
+          can_receive_suggestion: false,
+          line_code: null,
+          meta_data: null,
+          new_line: null,
+          old_line: 5,
+          rich_text: '-test',
+          text: '-test',
+          type: 'old',
+        },
+        {
+          can_receive_suggestion: true,
+          line_code: null,
+          meta_data: null,
+          new_line: 5,
+          old_line: null,
+          rich_text: '+new test',
+          text: '+new test',
+          type: 'new',
+        },
+      ],
+    },
+  ],
+  noteHtml: `
+      <div class="suggestion">
+      <div class="line">-oldtest</div>
+    </div>
+    <div class="suggestion">
+      <div class="line">+newtest</div>
+    </div>
+  `,
+  isApplied: false,
+  helpPagePath: 'path_to_docs',
+};
+
+describe('Suggestion component', () => {
+  let vm;
+  let diffTable;
+
+  beforeEach(done => {
+    const Component = Vue.extend(SuggestionsComponent);
+
+    vm = new Component({
+      propsData: MOCK_DATA,
+    }).$mount();
+
+    diffTable = vm.generateDiff(0).$mount().$el;
+
+    jest.spyOn(vm, 'renderSuggestions').mockImplementation(() => {});
+    vm.renderSuggestions();
+    Vue.nextTick(done);
+  });
+
+  describe('mounted', () => {
+    it('renders a flash container', () => {
+      expect(vm.$el.querySelector('.js-suggestions-flash')).not.toBeNull();
+    });
+
+    it('renders a container for suggestions', () => {
+      expect(vm.$refs.container).not.toBeNull();
+    });
+
+    it('renders suggestions', () => {
+      expect(vm.renderSuggestions).toHaveBeenCalled();
+      expect(vm.$el.innerHTML.includes('oldtest')).toBe(true);
+      expect(vm.$el.innerHTML.includes('newtest')).toBe(true);
+    });
+  });
+
+  describe('generateDiff', () => {
+    it('generates a diff table', () => {
+      expect(diffTable.querySelector('.md-suggestion-diff')).not.toBeNull();
+    });
+
+    it('generates a diff table that contains contents the suggested lines', () => {
+      MOCK_DATA.suggestions[0].diff_lines.forEach(line => {
+        const text = line.text.substring(1);
+
+        expect(diffTable.innerHTML.includes(text)).toBe(true);
+      });
+    });
+
+    it('generates a diff table with the correct line number for each suggested line', () => {
+      const lines = diffTable.querySelectorAll('.old_line');
+
+      expect(parseInt([...lines][0].innerHTML, 10)).toBe(5);
+    });
+  });
+});