test: add test for alert component (#109)

src/packages/Alert/test.tsx

@@ -0,0 +1,42 @@
+import React from 'react'
+import { render, screen } from '../../utils/testUtils'
+
+import Alert from '.'
+
+describe('<Alert />', () => {
+  it('should render alert with the given header', () => {
+    const headerText = 'Header'
+    render(
+      <Alert header={headerText}>
+        <div>This is an alert</div>
+      </Alert>
+    )
+
+    expect(screen.getByText(headerText)).toBeInTheDocument()
+  })
+
+  it('should render alert with the given children', () => {
+    const childText = 'This is an alert'
+    render(
+      <Alert>
+        <div>{childText}</div>
+      </Alert>
+    )
+
+    expect(screen.getByText(childText)).toBeInTheDocument()
+  })
+
+  it('should call onClose function when close is clicked', () => {
+    const onCloseMockFn = jest.fn()
+    render(
+      <Alert closable onClose={onCloseMockFn}>
+        <div>This is an alert</div>
+      </Alert>
+    )
+
+    const closeIcon = screen.getByText('X')
+    closeIcon!.click()
+
+    expect(onCloseMockFn).toBeCalled()
+  })
+})

src/packages/index.ts

@@ -28,4 +28,3 @@ export { default as Skeleton } from './Skeleton'
 export { default as Switch } from './Switch'
 export { default as Table } from './Table'
 export { default as Pagination } from './Pagination'
-