/*
 * (C) Copyright 2017 Boni Garcia (http://bonigarcia.github.io/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package io.github.bonigarcia;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoInteractions;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

@ExtendWith(MockitoExtension.class)
class LoginControllerLoginTest {

    // Mocking objects
    @InjectMocks
    LoginController loginController;

    @Mock
    LoginService loginService;

    // Test data
    UserForm userForm = new UserForm("foo", "bar");

    @Test
    void testLoginOk() {
        // Setting expectations (stubbing methods)
        when(loginService.login(userForm)).thenReturn(true);

        // Exercise SUT
        String reseponseLogin = loginController.login(userForm);

        // Verification
        assertEquals("OK", reseponseLogin);
        verify(loginService).login(userForm);
        verifyNoMoreInteractions(loginService);
    }

    @Test
    void testLoginKo() {
        // Setting expectations (stubbing methods)
        when(loginService.login(userForm)).thenReturn(false);

        // Exercise SUT
        String reseponseLogin = loginController.login(userForm);

        // Verification
        assertEquals("KO", reseponseLogin);
        verify(loginService).login(userForm);
        verifyNoInteractions(loginService);
    }

}

/*
 * (C) Copyright 2017 Boni Garcia (http://bonigarcia.github.io/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package io.github.bonigarcia;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

@ExtendWith(MockitoExtension.class)
class LoginControllerLoginTest {

    // Mocking objects
    @InjectMocks
    LoginController loginController;

    @Mock
    LoginService loginService;

    // Test data
    UserForm userForm = new UserForm("foo", "bar");

    @Test
    void testLoginOk() {
        // Setting expectations (stubbing methods)
        when(loginService.login(userForm)).thenReturn(true);

        // Exercise SUT
        String reseponseLogin = loginController.login(userForm);

        // Verification
        assertEquals("OK", reseponseLogin);
        verify(loginService).login(userForm);
        verifyNoMoreInteractions(loginService);
    }

    @Test
    void testLoginKo() {
        // Setting expectations (stubbing methods)
        when(loginService.login(userForm)).thenReturn(false);

        // Exercise SUT
        String reseponseLogin = loginController.login(userForm);

        // Verification
        assertEquals("KO", reseponseLogin);
        verify(loginService).login(userForm);
    }

}

Fix assertion in mockito test