add tests for user-provided class attr passthrough on FontAwesomeLayersText

Author: jasonlundien

src/components/__tests__/FontAwesomeLayersText.test.js

@@ -80,6 +80,32 @@ describe('counter', () => {
   })
 })
 
+describe('class attr', () => {
+  test('user-provided class is applied alongside fa-layers-text', () => {
+    const wrapper = compileAndMount({
+      template: '<font-awesome-layers-text value="New!" class="gray8" />',
+      components: {
+        FontAwesomeLayersText
+      }
+    })
+
+    expect(wrapper.element.classList.contains('fa-layers-text')).toBe(true)
+    expect(wrapper.element.classList.contains('gray8')).toBe(true)
+  })
+
+  test('user-provided class does not replace fa-layers-counter', () => {
+    const wrapper = compileAndMount({
+      template: '<font-awesome-layers-text :value="42" :counter="true" class="my-counter" />',
+      components: {
+        FontAwesomeLayersText
+      }
+    })
+
+    expect(wrapper.element.classList.contains('fa-layers-counter')).toBe(true)
+    expect(wrapper.element.classList.contains('my-counter')).toBe(true)
+  })
+})
+
 describe('reactivity', () => {
   test('changing props should update the element', async () => {
     const wrapper = compileAndMount({