Java Mockito 当接受参数但有条件时

Question

我正在使用 Mockito 编写一个测试用例，并且必须编写对方法的期望(签名如下所示)

public Object process(Employee e);

在我的测试类中，我必须按如下方式模拟我的期望:

when(someClass.process("any Employee with id between 1 and 100.").thenReturn(object1);
when(someClass.process("any Employee with id between 101 and 200.").thenReturn(object2);

如何有条件地设定期望。

Answer 1

您可以使用 Mockito Answer 来完成

final ArgumentCaptor<Employee> employeeCaptor = ArgumentCaptor.forClass(Employee.class);

Mockito.doAnswer(invocation -> {
    Employee employee = employeeCaptor.getValue();
    if(employee.getId() > 1 && employee.getId() < 100)
      return object1;
    else if(employee.getId() > 101 && employee.getId() < 200)
      return object2;
    else someOtherObject;
}).when(someClass).process(employeeCaptor.capture());