Test design management images when broken

- Test design list item image broken
- test design view image when broken

ee/app/assets/javascripts/design_management/components/image.vue

 <script>
 import { throttle } from 'lodash';
+import { GlIcon } from '@gitlab/ui';
 
 export default {
+  components: {
+    GlIcon,
+  },
   props: {
     image: {
       type: String,
@@ -23,6 +27,7 @@ export default {
     return {
       baseImageSize: null,
       imageStyle: null,
+      imageError: false,
     };
   },
   watch: {
@@ -49,6 +54,9 @@ export default {
     onImgLoad() {
       requestIdleCallback(this.setBaseImageSize, { timeout: 1000 });
     },
+    onImgError() {
+      this.imageError = true;
+    },
     setBaseImageSize() {
       const { contentImg } = this.$refs;
       if (!contentImg || contentImg.offsetHeight === 0 || contentImg.offsetWidth === 0) return;
@@ -86,13 +94,16 @@ export default {
 
 <template>
   <div class="m-auto js-design-image">
+    <gl-icon v-if="imageError" class="text-secondary-100" name="media-broken" :size="48" />
     <img
+      v-show="!imageError"
       ref="contentImg"
       class="mh-100"
       :src="image"
       :alt="name"
       :style="imageStyle"
       :class="{ 'img-fluid': !imageStyle }"
+      @error="onImgError"
       @load="onImgLoad"
     />
   </div>

ee/app/assets/javascripts/design_management/components/list/item.vue

 <script>
-import { GlLoadingIcon, GlIntersectionObserver } from '@gitlab/ui';
+import { GlLoadingIcon, GlIcon, GlIntersectionObserver } from '@gitlab/ui';
 import Icon from '~/vue_shared/components/icon.vue';
 import Timeago from '~/vue_shared/components/time_ago_tooltip.vue';
 import { n__, __ } from '~/locale';
@@ -9,6 +9,7 @@ export default {
   components: {
     GlLoadingIcon,
     GlIntersectionObserver,
+    GlIcon,
     Icon,
     Timeago,
   },
@@ -52,6 +53,7 @@ export default {
   data() {
     return {
       imageLoading: true,
+      imageError: false,
       isInView: false,
     };
   },
@@ -81,16 +83,31 @@ export default {
     notesLabel() {
       return n__('%d comment', '%d comments', this.notesCount);
     },
+    imageLink() {
+      return this.isInView ? this.imageV432x230 || this.image : '';
+    },
     showLoadingSpinner() {
       return this.imageLoading || this.isUploading;
     },
-    imageLink() {
-      return this.isInView ? this.imageV432x230 || this.image : '';
+    showImageErrorIcon() {
+      return this.imageError && this.isInView;
+    },
+    showImage() {
+      return !this.showLoadingSpinner && !this.showImageErrorIcon;
     },
   },
   methods: {
     onImageLoad() {
       this.imageLoading = false;
+      this.imageError = false;
+    },
+    onImageError() {
+      this.imageLoading = false;
+      this.imageError = true;
+    },
+    onAppear() {
+      this.isInView = true;
+      this.imageLoading = true;
     },
   },
   DESIGN_ROUTE_NAME,
@@ -112,15 +129,22 @@ export default {
           <icon :name="icon.name" :size="18" :class="icon.classes" />
         </span>
       </div>
-      <gl-loading-icon v-show="showLoadingSpinner" size="md" />
-      <gl-intersection-observer @appear="isInView = true">
+      <gl-intersection-observer @appear="onAppear">
+        <gl-loading-icon v-if="showLoadingSpinner" size="md" />
+        <gl-icon
+          v-else-if="showImageErrorIcon"
+          name="media-broken"
+          class="text-secondary"
+          :size="32"
+        />
         <img
-          v-show="!showLoadingSpinner"
+          v-show="showImage"
           :src="imageLink"
           :alt="filename"
           class="block mx-auto mw-100 mh-100 design-img"
           data-qa-selector="design_image"
           @load="onImageLoad"
+          @error="onImageError"
         />
       </gl-intersection-observer>
     </div>

ee/changelogs/unreleased/39046-improve-ui-for-broken-images-in-design-management.yml

+---
+title: Show custom 'media broken' icon for broken images in Design Management
+merge_request: 27460
+author:
+type: added

ee/spec/frontend/design_management/components/__snapshots__/image_spec.js.snap

@@ -4,6 +4,8 @@ exports[`Design management large image component renders image 1`] = `
 <div
   class="m-auto js-design-image"
 >
+  <!---->
+   
   <img
     alt="test"
     class="mh-100 img-fluid"
@@ -17,6 +19,8 @@ exports[`Design management large image component renders loading state 1`] = `
   class="m-auto js-design-image"
   isloading="true"
 >
+  <!---->
+   
   <img
     alt=""
     class="mh-100 img-fluid"
@@ -25,10 +29,20 @@ exports[`Design management large image component renders loading state 1`] = `
 </div>
 `;
 
+exports[`Design management large image component renders media broken icon on error 1`] = `
+<gl-icon-stub
+  class="text-secondary-100"
+  name="media-broken"
+  size="48"
+/>
+`;
+
 exports[`Design management large image component sets correct classes and styles if imageStyle is set 1`] = `
 <div
   class="m-auto js-design-image"
 >
+  <!---->
+   
   <img
     alt="test"
     class="mh-100"
@@ -42,6 +56,8 @@ exports[`Design management large image component zoom sets image style when zoom
 <div
   class="m-auto js-design-image"
 >
+  <!---->
+   
   <img
     alt="test"
     class="mh-100"

ee/spec/frontend/design_management/components/image_spec.js

 import { shallowMount } from '@vue/test-utils';
+import { GlIcon } from '@gitlab/ui';
 import DesignImage from 'ee/design_management/components/image.vue';
 
 describe('Design management large image component', () => {
@@ -52,6 +53,21 @@ describe('Design management large image component', () => {
     });
   });
 
+  it('renders media broken icon on error', () => {
+    createComponent({
+      isLoading: false,
+      image: 'test.jpg',
+      name: 'test',
+    });
+
+    const image = wrapper.find('img');
+    image.trigger('error');
+    return wrapper.vm.$nextTick().then(() => {
+      expect(image.isVisible()).toBe(false);
+      expect(wrapper.find(GlIcon).element).toMatchSnapshot();
+    });
+  });
+
   describe('zoom', () => {
     const baseImageWidth = 100;
     const baseImageHeight = 100;
@@ -75,12 +91,10 @@ describe('Design management large image component', () => {
         },
       );
 
-      jest
-        .spyOn(wrapper.vm.$refs.contentImg, 'offsetWidth', 'get')
-        .mockImplementation(() => baseImageWidth);
+      jest.spyOn(wrapper.vm.$refs.contentImg, 'offsetWidth', 'get').mockReturnValue(baseImageWidth);
       jest
         .spyOn(wrapper.vm.$refs.contentImg, 'offsetHeight', 'get')
-        .mockImplementation(() => baseImageHeight);
+        .mockReturnValue(baseImageHeight);
     });
 
     it('emits @resize event on zoom', () => {

ee/spec/frontend/design_management/components/list/__snapshots__/item_spec.js.snap

 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`Design management list item component when item appears in view renders media broken icon when image onerror triggered 1`] = `
+<gl-icon-stub
+  class="text-secondary"
+  name="media-broken"
+  size="32"
+/>
+`;
+
 exports[`Design management list item component with no notes renders item with correct status icon for creation event 1`] = `
 <router-link-stub
   class="card cursor-pointer text-plain js-design-list-item design-list-item"
@@ -23,16 +31,11 @@ exports[`Design management list item component with no notes renders item with c
       </span>
     </div>
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -96,16 +99,11 @@ exports[`Design management list item component with no notes renders item with c
       </span>
     </div>
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -169,16 +167,11 @@ exports[`Design management list item component with no notes renders item with c
       </span>
     </div>
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -229,16 +222,11 @@ exports[`Design management list item component with no notes renders item with n
   >
     <!---->
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -289,15 +277,15 @@ exports[`Design management list item component with no notes renders loading spi
   >
     <!---->
      
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
       <gl-loading-icon-stub
         color="orange"
         label="Loading"
         size="md"
       />
        
-    <gl-intersection-observer-stub
-      options="[object Object]"
-    >
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -349,16 +337,11 @@ exports[`Design management list item component with notes renders item with mult
   >
     <!---->
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"
@@ -426,16 +409,11 @@ exports[`Design management list item component with notes renders item with sing
   >
     <!---->
      
-    <gl-loading-icon-stub
-      color="orange"
-      label="Loading"
-      size="md"
-      style="display: none;"
-    />
-     
     <gl-intersection-observer-stub
       options="[object Object]"
     >
+      <!---->
+       
       <img
         alt="test"
         class="block mx-auto mw-100 mh-100 design-img"

ee/spec/frontend/design_management/components/list/item_spec.js

 import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { GlIcon, GlIntersectionObserver } from '@gitlab/ui';
 import VueRouter from 'vue-router';
 import Item from 'ee/design_management/components/list/item.vue';
-import { GlIntersectionObserver } from '@gitlab/ui';
 
 const localVue = createLocalVue();
 localVue.use(VueRouter);
@@ -59,25 +59,36 @@ describe('Design management list item component', () => {
   });
 
   describe('when item appears in view', () => {
+    let image;
+
     beforeEach(() => {
       createComponent();
+      image = wrapper.find('img');
+
+      expect(image.attributes('src')).toBe('');
 
       wrapper.find(GlIntersectionObserver).vm.$emit('appear');
       return wrapper.vm.$nextTick();
     });
 
     it('renders an image', () => {
-      const image = wrapper.find('img');
       expect(image.attributes('src')).toBe('http://via.placeholder.com/300');
     });
 
+    it('renders media broken icon when image onerror triggered', () => {
+      image.trigger('error');
+      return wrapper.vm.$nextTick().then(() => {
+        expect(image.isVisible()).toBe(false);
+        expect(wrapper.find(GlIcon).element).toMatchSnapshot();
+      });
+    });
+
     describe('when imageV432x230 and image provided', () => {
       it('renders imageV432x230 image', () => {
         const mockSrc = 'mock-imageV432x230-url';
         wrapper.setProps({ imageV432x230: mockSrc });
 
         return wrapper.vm.$nextTick().then(() => {
-          const image = wrapper.find('img');
           expect(image.attributes('src')).toBe(mockSrc);
         });
       });