test(ellipsis): add ellipsis test (#342)

src/ellipsis/tests/Ellipsis.spec.tsx

@@ -0,0 +1,42 @@
+import { mount } from '@vue/test-utils'
+import { h } from 'vue'
+import { NEllipsis } from '../index'
+
+describe('n-ellipsis', () => {
+  it('should work with import on demand', () => {
+    mount(NEllipsis)
+  })
+
+  it('should work with base', async () => {
+    const wrapper = mount(NEllipsis, {
+      props: { style: 'max-width: 10px;' },
+      slots: { default: () => 'test n-ellipsis' }
+    })
+
+    expect(wrapper.find('.n-ellipsis').exists()).toBe(true)
+    expect(wrapper.find('.n-ellipsis').attributes('style')).toContain(
+      'text-overflow: ellipsis;'
+    )
+  })
+
+  it('should work with `line-clamp` prop', async () => {
+    const wrapper = mount(NEllipsis, {
+      props: { lineClamp: 2 },
+      slots: {
+        default: () => (
+          <div>
+            电灯熄灭 物换星移 泥牛入海
+            <br />
+            黑暗好像 一颗巨石 按在胸口
+            <br />
+            独脚大盗 百万富翁 摸爬滚打
+          </div>
+        )
+      }
+    })
+
+    expect(wrapper.find('.n-ellipsis').classes()).toContain(
+      'n-ellipsis--line-clamp'
+    )
+  })
+})