1 files changed, 88 insertions, 0 deletions
diff --git a/spec/javascripts/diffs/components/diff_file_spec.js b/spec/javascripts/diffs/components/diff_file_spec.js
new file mode 100644
index 00000000000..1c1edfac68c
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+++ b/spec/javascripts/diffs/components/diff_file_spec.js
@@ -0,0 +1,88 @@
+import Vue from 'vue';
+import DiffFileComponent from '~/diffs/components/diff_file.vue';
+import store from '~/mr_notes/stores';
+import { createComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
+import diffFileMockData from '../mock_data/diff_file';
+
+describe('DiffFile', () => {
+  let vm;
+  const getDiffFileMock = () => Object.assign({}, diffFileMockData);
+
+  beforeEach(() => {
+    vm = createComponentWithStore(Vue.extend(DiffFileComponent), store, {
+      file: getDiffFileMock(),
+      currentUser: {},
+    }).$mount();
+  });
+
+  describe('template', () => {
+    it('should render component with file header, file content components', () => {
+      const el = vm.$el;
+      const { fileHash, filePath } = diffFileMockData;
+
+      expect(el.id).toEqual(fileHash);
+      expect(el.classList.contains('diff-file')).toEqual(true);
+      expect(el.querySelectorAll('.diff-content.hidden').length).toEqual(0);
+      expect(el.querySelector('.js-file-title')).toBeDefined();
+      expect(el.querySelector('.file-title-name').innerText.indexOf(filePath) > -1).toEqual(true);
+      expect(el.querySelector('.js-syntax-highlight')).toBeDefined();
+      expect(el.querySelectorAll('.line_content').length > 5).toEqual(true);
+    });
+
+    describe('collapsed', () => {
+      it('should not have file content', done => {
+        expect(vm.$el.querySelectorAll('.diff-content.hidden').length).toEqual(0);
+        expect(vm.file.collapsed).toEqual(false);
+        vm.file.collapsed = true;
+
+        vm.$nextTick(() => {
+          expect(vm.$el.querySelectorAll('.diff-content.hidden').length).toEqual(1);
+
+          done();
+        });
+      });
+
+      it('should have collapsed text and link', done => {
+        vm.file.collapsed = true;
+
+        vm.$nextTick(() => {
+          expect(vm.$el.innerText).toContain('This diff is collapsed');
+          expect(vm.$el.querySelectorAll('.js-click-to-expand').length).toEqual(1);
+
+          done();
+        });
+      });
+
+      it('should have loading icon while loading a collapsed diffs', done => {
+        vm.file.collapsed = true;
+        vm.isLoadingCollapsedDiff = true;
+
+        vm.$nextTick(() => {
+          expect(vm.$el.querySelectorAll('.diff-content.loading').length).toEqual(1);
+
+          done();
+        });
+      });
+    });
+  });
+
+  describe('too large diff', () => {
+    it('should have too large warning and blob link', done => {
+      const BLOB_LINK = '/file/view/path';
+      vm.file.tooLarge = true;
+      vm.file.viewPath = BLOB_LINK;
+
+      vm.$nextTick(() => {
+        expect(vm.$el.innerText).toContain(
+          'This source diff could not be displayed because it is too large',
+        );
+        expect(vm.$el.querySelector('.js-too-large-diff')).toBeDefined();
+        expect(vm.$el.querySelector('.js-too-large-diff a').href.indexOf(BLOB_LINK) > -1).toEqual(
+          true,
+        );
+
+        done();
+      });
+    });
+  });
+});