Mockito Programming Model: Difference between revisions

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=Stub Functionality=
A [[Software_Testing_Concepts#Stub|stub]] returns synthetic responses or throws exceptions when its methods are invoked. Mockito implements the stub functionality with <code>Mockito.when(<method>).thenReturn(...)</code> pattern.

Revision as of 04:20, 16 July 2021

Internal

Overview

API

import static org.mockito.Mockito.mock;
import com.example.ExternalDependency;

public class SomeClassTest {

  private ExternalDependency mockExternalDependency;

  @Before
  public void setUp() {
    mockExternalDependency = mock(ExternalDependency.class);
  }

  @Test
  public void someTest() throws Exception {
    ...
  }
}

Annotations

import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import com.example.ExternalDependency;

public class SomeClassTest {

  private AutoCloseable mocks;

  @Mock
  private ExternalDependency mockExternalDependency;

  @Before
  public void openMocks() {
    mocks = MockitoAnnotations.openMocks(this);
  }

  @After
  public void releaseMocks() throws Exception {
    mocks.close();
  }

  @Test
  public void someTest() throws Exception {
    ...
  }
}

Stub Functionality

A stub returns synthetic responses or throws exceptions when its methods are invoked. Mockito implements the stub functionality with Mockito.when(<method>).thenReturn(...) pattern.