Mockito 使用注解来初始化的代码片断 例子

initMocks(this); 这句话的意思是初始化所有需要mock的对象，这些对象是使用@Mock注解所定义的

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import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.mockito.Mockito.when;
import static org.mockito.MockitoAnnotations.initMocks;

public class HealthServiceTest {

    @Mock
    private MetricsClient metricsClient;
    @Mock
    private SequenceService sequenceService;
    @Mock
    private MetricsFormatter metricsFormatter;

    HealthService healthService;

    @Before
    public void setUp() throws Exception {
        initMocks(this);
        healthService = new HealthService(new SystemStatus(new SDAStatus(true, true)), metricsClient, metricsFormatter, sequenceService);
    }

    @Test
    public void willReturnAvailable() throws Exception {
        when(sequenceService.isHealth()).thenReturn(true);
        HealthReport healthReport = healthService.getHealthReport();
        assertThat(healthReport.isAvailable(), is(true));
    }

    @Test
    public void willReturnUnavailableAfterTimeout() throws Exception {
        HealthReport healthReport = healthService.getHealthReport();
        assertThat(healthReport.isAvailable(), is(true));
        healthService.setHealthReportTimeout(10);

        Thread.sleep(100);
        HealthReport anotherHealthReport = healthService.getHealthReport();
        assertThat(anotherHealthReport.isAvailable(), is(false));
    }
}