- Types of test doubles,
- Dummies
- Stubs
- Spies
- Mocks
- Fakes
Example
Consider the below code snippet,
interface Authorizer {
public Boolean authorize(String username, String password);
}
public class System {
public System(Authorizer authorizer) {
this.authorizer = authorizer;
}
public int loginCount() {
//returns number of logged in users.
}
}public class DummyAuthorizer implements Authorizer {
public Boolean authorize(String username, String password) {
return null
}
}