如何模擬包裝在JAXBElement中的對象

Question

考慮一下JAXB生成的以下代碼：

public class CnpOnlineResponse {

    protected JAXBElement<? extends TransactionTypeWithReportGroup> transactionResponse;

    public JAXBElement<? extends TransactionTypeWithReportGroup> getTransactionResponse() {
        return transactionResponse;
    }

    public void setTransactionResponse(JAXBElement<? extends TransactionTypeWithReportGroup> value) {
        this.transactionResponse = value;
    }
}

public class AuthorizationResponse extends TransactionTypeWithReportGroup {

}

public class ObjectFactory {

    public JAXBElement<AuthorizationResponse> createAuthorizationResponse(AuthorizationResponse value) {
        return new JAXBElement<AuthorizationResponse>(_AuthorizationResponse_QNAME, AuthorizationResponse.class, null, value);
    }
}

我正在編寫一個測試，其中我同時模擬了CnpOnlineResponse和AuthorizationResponse：

@Mock private CnpOnlineResponse mockCnpOnlineResponse;
@Mock private AuthorizationResponse mockAuthorizationResponse;

final JAXBElement<AuthorizationResponse> authorization = CnpContext.getObjectFactory().createAuthorizationResponse(mockAuthorizationResponse);

when(mockCnpOnlineResponse.getTransactionResponse()).thenReturn(authorization); // <= ERROR here

但是我收到以下編譯錯誤：

The method thenReturn(JAXBElement<capture#1-of ? extends TransactionTypeWithReportGroup>) in the type OngoingStubbing<JAXBElement<capture#1-of ? extends TransactionTypeWithReportGroup>> is not applicable for the arguments (JAXBElement<AuthorizationResponse>)

任何幫助表示贊賞，我不明白為什么它認為沒有將thenReturn傳遞給所需類型的對象。

Answer 1

似乎混淆了類型推斷。

使用thenAnswer （或短then ）。

when(mockCnpOnlineResponse.getTransactionResponse()).then(i -> authorization);

i -> authorization是評估為Answer<? extends TransactionTypeWithReportGroup>的lambda表達式Answer<? extends TransactionTypeWithReportGroup> Answer<? extends TransactionTypeWithReportGroup>使其能夠匹配的捕獲。