test(PasswordInput): update test cases

src/password-input/test/__snapshots__/index.spec.js.snap

@@ -0,0 +1,7 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`should render error info correctly 1`] = `
+<div class="van-password-input__error-info">
+  error!
+</div>
+`;

src/password-input/test/index.legacy.js

@@ -1,16 +0,0 @@
-import PasswordInput from '..';
-import { mount } from '@vue/test-utils';
-
-test('focus event', () => {
-  const focus = jest.fn();
-  const wrapper = mount(PasswordInput, {
-    context: {
-      on: {
-        focus,
-      },
-    },
-  });
-
-  wrapper.find('.van-password-input__security').trigger('touchstart');
-  expect(focus).toHaveBeenCalledTimes(1);
-});

src/password-input/test/index.spec.js

@@ -0,0 +1,19 @@
+import PasswordInput from '..';
+import { mount } from '@vue/test-utils';
+
+test('should emit focus event when security is touched', () => {
+  const wrapper = mount(PasswordInput);
+  wrapper.find('.van-password-input__security').trigger('touchstart');
+  expect(wrapper.emitted('focus').length).toEqual(1);
+});
+
+test('should render error info correctly', () => {
+  const wrapper = mount(PasswordInput, {
+    props: {
+      errorInfo: 'error!',
+    },
+  });
+  expect(
+    wrapper.find('.van-password-input__error-info').html()
+  ).toMatchSnapshot();
+});