package advanced;

import com.sandwich.koan.Koan;

import static com.sandwich.util.Assert.fail;

public class AboutMocks {

static interface Collaborator {

public void doBusinessStuff();

}

static class ExplosiveCollaborator implements Collaborator {

public void doBusinessStuff() {

fail("Default collaborator's behavior is complicating testing.");

}

}

static class ClassUnderTest {

Collaborator c;

public ClassUnderTest(){

// default is to pass a broken Collaborator, test should pass one

// that doesn't throw exception

this(new ExplosiveCollaborator());

}

public ClassUnderTest(Collaborator c){

this.c = c;

}

public boolean doSomething(){

c.doBusinessStuff();

return true;

}

}

@Koan

public void simpleAnonymousMock(){

// HINT: pass a safe Collaborator implementation to constructor

// new ClassUnderTest(new Collaborator(){... it should not be the

// objective of this test to test that collaborator, so replace it

new ClassUnderTest().doSomething();

}

}