Java Unit Test - Mockito mock靜態方法
阿新 • • 發佈:2021-06-25
當需要mock靜態方法的時候,必須加註解@PrepareForTest和@RunWith。註解@PrepareForTest裡寫的類是靜態方法所在的類。
import org.junit.Test; import org.junit.runner.RunWith; import org.powermock.api.mockito.PowerMockito; import org.powermock.core.classloader.annotations.PrepareForTest; import org.powermock.modules.junit4.PowerMockRunner; import static org.junit.Assert.assertEquals; import static org.mockito.Matchers.eq; @RunWith(PowerMockRunner.class) @PrepareForTest(String.class) public class MockPrepareForTest { @Test public void testStaticMathod () { TestString testString = new TestString(); PowerMockito.mockStatic(String.class); PowerMockito.when(String.valueOf(eq(100l))).thenReturn("TEST"); String result = testString.getTestString(100l); assertEquals("TEST", result); } class TestString { public String getTestString(long number) { return String.valueOf(number); } } }