CODEWITHSUNDEEP
javaspringmockitojunit4
radha r
radha r

Reputation: 145

org.mockito.exceptions.misusing.MissingMethodInvocationException: when() requires an argument which has to be 'a method call on a mock'

I have developed one spring sample project with a controller and called a static method in it.

When I try to run the code, it leads me to an exception.

LoginController .java

@Controller
public class LoginController {@ResponseBody
@RequestMapping(value="/login")
public String login(){
    System.out.println("in login method");
    String s = SampleClass.method();
    System.out.println("String value :  "+s);
    return "welcome to login page";
}}

SampleClass.java

public class SampleClass {

public static String method(){
    System.out.println("in static method");
    return "static method";
}}

LoginControllerTest.java

@PrepareForTest(SampleClass.class)
public class LoginControllerTest {

private MockMvc mockMvc;

@InjectMocks
private LoginController loginController;


@Before
public void setUp() {

    System.out.println("in setup");
    PowerMockito.mockStatic(SampleClass.class);

    MockitoAnnotations.initMocks(this);
    mockMvc = MockMvcBuilders.standaloneSetup(loginController).build();
    System.out.println("setupdone");

}

@Test
public void loginTest() throws Exception{
    System.out.println("in login test");
    PowerMockito.when(SampleClass.method()).thenReturn("hello");
    mockMvc.perform(get("/login"))
    //.andDo(print())
    .andExpect(status().isOk());
    System.out.println("test completed");
}}

Error

org.mockito.exceptions.misusing.MissingMethodInvocationException: when() requires an argument which has to be 'a method call on a mock'. For example: when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because: 1. you stub either of: final/private/equals()/hashCode() methods. Those methods cannot be stubbed/verified. Mocking methods declared on non-public parent classes is not supported. 2. inside when() you don't call method on mock but on some other object.

at org.powermock.api.mockito.PowerMockito.when(PowerMockito.java:495) at com.junit.example.controller.LoginControllerTest.setUp(LoginControllerTest.java:57) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Can any one help me out with a solution?

Upvotes: 5

Views: 10181

Answers (2)

Christopher Schneider
Christopher Schneider

Reputation: 3915

Based on the docs, you're not using this correctly: https://github.com/powermock/powermock/wiki/MockitoUsage

From the docs:

  1. Annotate the class with @PrepareForTest(Static.class) (You're not doing this)
  2. Call mockStatic PowerMockito.mockStatic(Static.class);
  3. Use Mockito.when(). You are using PowerMockito.when()

Upvotes: 4

Arpit Aggarwal
Arpit Aggarwal

Reputation: 29306

Why are you making your Test complicated?, when you can simply write it as:

import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InjectMocks;
import org.mockito.MockitoAnnotations;

import com.arpit.controller.LoginController;

public class LoginControllerTest {

    @InjectMocks
    private LoginController loginController;

    @Before
    public void setupMock() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void loginTest() {
        String val = loginController.login();
        assertEquals("welcome to login page", val);
    }
}

Output on Console:

in login method
in static method
String value :  static method

Upvotes: -2

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