test(floating-label): add snapshots

components/floating-label/__test__/FloatingLabel.spec.js

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+import 'mutationobserver-shim'
+import { mount } from '@vue/test-utils'
+import FloatingLabel from '../FloatingLabel.vue'
+
+describe('FloatingLabel', () => {
+  it('should mount', () => {
+    let wrapper = mount(FloatingLabel)
+    expect(wrapper.isVueInstance()).toBeTruthy()
+    expect(wrapper.vm.$data.mdcFloatingLabel).toBeDefined()
+  })
+
+  it('should render with no prop', () => {
+    let wrapper = mount(FloatingLabel)
+    expect(wrapper).toMatchSnapshot()
+    expect(wrapper.classes()).toContain('mdc-floating-label')
+  })
+
+  it('should render with floatAbove', () => {
+    let wrapper = mount(FloatingLabel, {
+      propsData: {
+        floatAbove: true
+      }
+    })
+    expect(wrapper).toMatchSnapshot()
+    expect(wrapper.classes()).toContain('mdc-floating-label--float-above')
+  })
+
+  it('should render with shake', () => {
+    let wrapper = mount(FloatingLabel, {
+      propsData: {
+        shake: true
+      }
+    })
+    expect(wrapper).toMatchSnapshot()
+    expect(wrapper.classes()).toContain('mdc-floating-label--shake')
+  })
+})

components/floating-label/__test__/__snapshots__/FloatingLabel.spec.js.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`FloatingLabel should render with floatAbove 1`] = `<label class="mdc-floating-label mdc-floating-label--float-above"></label>`;
+
+exports[`FloatingLabel should render with no prop 1`] = `<label class="mdc-floating-label"></label>`;
+
+exports[`FloatingLabel should render with shake 1`] = `<label class="mdc-floating-label mdc-floating-label--shake"></label>`;