LoginFormTest.java

@RunWith(RobolectricTestRunner.class)
@Config(manifest="src/main/AndroidManifest.xml", sdk=23)
public class LoginFormTest {
  LoginForm loginForm = new LoginForm(RuntimeEnvironment.application);
  TextView emailView = (TextView) loginForm.findViewById(R.id.email);
  TextView passwordView = (TextView) loginForm.findViewById(R.id.password);
  Button signInButton = (Button) loginForm.findViewById(R.id.email_sign_in_button);
  TestListener listener = new TestListener();

  @Test public void onClickSignInButton_shouldNotInvokeListenerForInvalidInput() throws Exception {
    emailView.setText("bad_email");
    passwordView.setText("bad_password");
    loginForm.setOnClickListener(listener);
    signInButton.performClick();
    assertThat(listener.click).isFalse();
  }

  @Test public void onClickSignInButton_shouldInvokeListenerForValidInput() throws Exception {
    emailView.setText("foo@example.com");
    passwordView.setText("hello");
    loginForm.setOnClickListener(listener);
    signInButton.performClick();
    assertThat(listener.click).isTrue();
  }
}