[英]How to use easymock/powermock mock objects to respond to methods with arguments
我正在嘗試對Y類進行單元測試。
我有X班
public class X {
private List<B> getListOfB(List<A> objs) {
}
}
現在是另一個Y類
public class Y {
private X x;
public Z getZ() {
List<A> aObjs = created inline.
// I am having problems over here
List<B> bObjs = x.getListOfB(aObjs);
}
}
我正在嘗試測試Y,但似乎無法理解。 所以這是我到目前為止所遇到的,我被困住了
@Test
public void testgetZ() {
X x = createMock(X.class);
Y y = new Y(x);
// How do I make this work?
y.getZ();
}
您需要在X類的模擬實例上添加期望。 這些期望將設置X對象以返回可以測試的B對象的列表。
我還提到了捕獲的使用。 在EasyMock中,捕獲可用於對傳遞給模擬方法的對象執行斷言。 如果(例如您的示例)無法提供傳遞給模擬對象的實例化對象,則此功能特別有用。
因此,我認為您希望測試看起來像這樣:
@Test
public void thatYClassCanBeMocked() {
final X mockX = createMock(X.class);
final Y y = new Y(mockX);
//Set up the list of B objects to return from the expectation
final List<B> expectedReturnList = new List<B>();
//Capture object for the list Of A objects to be used in the expectation
final Capture<List<A>> listOfACapture = new Capture<List<A>>();
//expectation that captures the list of A objects provided and returns the specified list of B objects
EasyMock.expect( mockX.getListOfB( EasyMock.capture(listOfACapture) ) ).andReturn(expectedReturnList);
//Replay the mock X instance
EasyMock.replay(mockX);
//Call the method you're testing
final Z = y.getZ();
//Verify the Mock X instance
EasyMock.verify(mockX);
//Get the captured list of A objects from the capture object
List<A> listOfA = listOfACapture.getValue();
//Probably perform some assertions on the Z object returned by the method too.
}
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