Issue-processing#2923 added test for the Login Form.

Author: gauravsingh94

Diff for: client/modules/User/components/LoginForm.unit.test.jsx

@@ -0,0 +1,86 @@
+import React from 'react';
+import thunk from 'redux-thunk';
+import configureStore from 'redux-mock-store';
+import LoginForm from './LoginForm';
+import * as actions from '../actions';
+import { initialTestState } from '../../../testData/testReduxStore';
+import { reduxRender, screen, fireEvent, act } from '../../../test-utils';
+
+const mockStore = configureStore([thunk]);
+const store = mockStore(initialTestState);
+
+jest.mock('../actions', () => ({
+  ...jest.requireActual('../actions'),
+  validateAndLoginUser: jest.fn().mockReturnValue(
+    (dispatch) =>
+      new Promise((resolve) => {
+        setTimeout(() => {
+          dispatch({ type: 'AUTH_USER', payload: {} });
+          dispatch({ type: 'SET_PREFERENCES', payload: {} });
+          resolve();
+        }, 100);
+      })
+  )
+}));
+
+const subject = () => {
+  reduxRender(<LoginForm />, {
+    store
+  });
+};
+
+describe('<LoginForm/>', () => {
+  test('Renders form with the correct fields.', () => {
+    subject();
+    const emailTextElement = screen.getByText(/email or username/i);
+    expect(emailTextElement).toBeInTheDocument();
+
+    const emailInputElement = screen.getByRole('textbox', {
+      name: /email or username/i
+    });
+    expect(emailInputElement).toBeInTheDocument();
+
+    const passwordTextElement = screen.getByText(/password/i);
+    expect(passwordTextElement).toBeInTheDocument();
+
+    const passwordInputElement = screen.getByLabelText(/password/i);
+    expect(passwordInputElement).toBeInTheDocument();
+
+    const loginButtonElement = screen.getByRole('button', {
+      name: /log in/i
+    });
+    expect(loginButtonElement).toBeInTheDocument();
+  });
+  test('Validate and login user is called with the correct values.', async () => {
+    subject();
+
+    const emailElement = screen.getByRole('textbox', {
+      name: /email or username/i
+    });
+    fireEvent.change(emailElement, {
+      target: {
+        value: '[email protected]'
+      }
+    });
+
+    const passwordElement = screen.getByLabelText(/password/i);
+
+    fireEvent.change(passwordElement, {
+      target: {
+        value: 'correctpassword'
+      }
+    });
+
+    const loginButton = screen.getByRole('button', {
+      name: /log in/i
+    });
+    await act(async () => {
+      fireEvent.click(loginButton);
+    });
+
+    expect(actions.validateAndLoginUser).toHaveBeenCalledWith({
+      email: '[email protected]',
+      password: 'correctpassword'
+    });
+  });
+});