BAEL-7240 Add example code for verifying lambda calls with mockito

This commit is contained in:
Sam Gardner 2023-12-04 13:18:04 +00:00
parent 67e11e004e
commit 75afba12d1
2 changed files with 67 additions and 0 deletions

View File

@ -0,0 +1,26 @@
package com.baeldung.lambdacalls;
import java.util.ArrayList;
public class LambdaExample {
private BrickLayer brickLayer = new BrickLayer();
static ArrayList<String> bricksList = new ArrayList<>();
public void createWall(String bricks){
Runnable build = () -> brickLayer.layBricks(bricks);
build.run();
}
public ArrayList<String> getBricksList(){
return bricksList;
}
static class BrickLayer {
void layBricks(String bricks){
bricksList.add(bricks);
}
}
}

View File

@ -0,0 +1,41 @@
package com.baeldung.lambdacalls;
import static com.baeldung.lambdacalls.LambdaExample.*;
import static junit.framework.TestCase.assertEquals;
import static org.mockito.Mockito.verify;
import java.util.ArrayList;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
@RunWith(MockitoJUnitRunner.class)
public class LambdaCallsUnitTest {
@Mock
private/**/ BrickLayer brickLayer;
@InjectMocks
private LambdaExample lambdaExample;
@Test
public void whenCallingALambda_thenTheInvocationCanBeConfirmedWithCorrectArguments(){
String bricks = "red bricks";
lambdaExample.createWall(bricks);
verify(brickLayer).layBricks(bricks);
}
@Test
public void whenCallingALambda_thenCorrectBehaviourIsPerformed(){
LambdaExample lambdaExample = new LambdaExample();
String bricks = "red bricks";
lambdaExample.createWall(bricks);
ArrayList<String> bricksList = lambdaExample.getBricksList();
assertEquals(bricks, bricksList.get(0));
}
}