test(transfer): add test (tusen-ai#925)

src/transfer/tests/Transfer.spec.ts

@@ -1,8 +1,39 @@
 import { mount } from '@vue/test-utils'
+import { sleep } from 'seemly'
 import { NTransfer } from '../index'
 
 describe('n-transfer', () => {
   it('should work with import on demand', () => {
     mount(NTransfer)
   })
+
+  it('should work with `disabled` prop', () => {
+    const wrapper = mount(NTransfer, { props: { disabled: true } })
+    expect(wrapper.find('.n-transfer').attributes('class')).toContain(
+      'n-transfer--disabled'
+    )
+  })
+
+  it('should work with `filterable` prop', () => {
+    const wrapper = mount(NTransfer, { props: { filterable: true } })
+    expect(wrapper.find('.n-transfer').attributes('class')).toContain(
+      'n-transfer--filterable'
+    )
+  })
+
+  it('should work with `filter` prop', async () => {
+    const options = [
+      {
+        label: 'test1',
+        value: 'test1'
+      }
+    ]
+    const onFilter = jest.fn()
+    const wrapper = mount(NTransfer, {
+      props: { filterable: true, filter: onFilter, options: options }
+    })
+    await wrapper.find('input').setValue('1')
+    await sleep(300)
+    expect(onFilter).toHaveBeenCalled()
+  })
 })