如何模擬番石榴Maps.newConcurrentMap（）

Question

如何模擬這個？

public class MyClass { 

} 

Answer 1

使用dependency injection：

public class MyClass { 
    private Map<String, MyClassModel> list; // Don't initialize. 

    public MyClass(Map<String, MyClassModel> list) { // Inject to ctor. 
    this.list = list; 
    } 
} 

Answer 2

long expectedId = 42; 

ServiceRegistartor tested = new ServiceRegistartor(); 

mockStatic(IdGenerator.class); 

expect(IdGenerator.generateNewId()).andReturn(expectedId); 

replay(IdGenerator.class); 

long actualId = tested.registerService(new Object()); 

verify(IdGenerator.class); 

assertEquals(expectedId, actualId);