Add feature image grid

tests/unit/example.spec.js

@@ -1,12 +0,0 @@
-import { shallowMount } from '@vue/test-utils'
-import HelloWorld from '@/components/HelloWorld.vue'
-
-describe('HelloWorld.vue', () => {
-  it('renders props.msg when passed', () => {
-    const msg = 'new message'
-    const wrapper = shallowMount(HelloWorld, {
-      propsData: { msg }
-    })
-    expect(wrapper.text()).toMatch(msg)
-  })
-})

tests/unit/image_grid.spec.js

@@ -0,0 +1,12 @@
+import { mount } from '@vue/test-utils'
+import ImageGrid from '@/components/ImageGrid.vue'
+
+describe('ImageGrid.vue', () => {
+  it('toggles loading', () => {
+    const wrapper = mount(ImageGrid)
+    expect(wrapper.vm.loading).toBe(true)
+    expect(wrapper.text()).toContain('Loading...')
+    wrapper.setData({ loading: false })
+    expect(wrapper.vm.loading).toBe(false)
+  })
+})