Mock Static Methods in JUnit5 using PowerMockito

Need help for Mocking Static methods using JUnit5 with PowerMockito framework.

Powermock junit5 and mockito2.x not working RunnerTestSuiteChunker not found

import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.powermock.api.mockito.PowerMockito; import org.powermock.core.classloader.annotations.PowerMockIgnore; import org.powermock.core.classloader.annotations.PrepareForTest; import org.powermock.modules.junit4.PowerMockRunner; import static org.mockito.Mockito.*; @PrepareForTest(EnvironmentUtils.class) @RunWith(PowerMockRunner.class) public class RuleControllerTest { @Before public void setup() { PowerMockito.mockStatic(EnvironmentUtils.class); } @Test public void test_rule_create_rule() throws IOException { when(EnvironmentUtils.isCF()).thenReturn(true); } } 

and pom.xml

<!-- --> <dependency> <groupId>org.mockito</groupId> <artifactId>mockito-core</artifactId> <version>2.23.4</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> <version>5.4.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> <version>5.4.2</version> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-engine</artifactId> <version>5.4.2</version> <scope>test</scope> </dependency> <!-- --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.powermock</groupId> <artifactId>powermock-module-junit4</artifactId> <version>2.0.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.powermock</groupId> <artifactId>powermock-api-mockito2</artifactId> <version>2.0.2</version> <scope>test</scope> </dependency> 

I followed Junit5 sample from here, 1) 2) Junit5 mock a static method

But facing an issue as, I know there is an existing issue for Junit5 with powermock but any one knows any other way to Mock static methods using JUnit5 using powermock.

3 Answers

With mockito v 3.4.0 we can simply use mockStatic() method without powermock library :

 try (MockedStatic mocked = mockStatic(Foo.class)) { mocked.when(Foo::method).thenReturn("bar"); assertEquals("bar", Foo.method()); mocked.verify(Foo::method); } assertEquals("foo", Foo.method()); 

Latest documentation and example :

You're using @Before which is junit4 annotation.. Junit5 have @BeforeEach / @BeforeAll(whichever suits your requirement). Also, your import for @Test are from junit4 but not from junit5(That should be org.junit.jupiter.api.Test;)

As your link suggests, still you can't do power mock stuff with junit-5 directly, simply because there's no PowerMockRunner (Extension) still available for junit-5.

However, In your above code possibly what has gone wrong is this line.

when(EnvironmentUtils.isCF()).thenReturn(true); 

Here, note that you are using when of mockito (by import static org.mockito.Mockito.*;)

Instead, you have to use the one of PowerMockito. So

Remove this line import static org.mockito.Mockito.*;

Instead, add this. import static org.powermock.api.mockito.PowerMockito.*;