如何在JUnit Test for SSLContextBuilder.create（）。loadTrustMaterial中引發異常？

Question

我嘗試為以下代碼編寫junit測試，但無法在測試用例中引發異常。 以下是實現：

public static HttpClientBuilder createTrustAllHttpClientBuilder() {
    try {
        SSLContext sslContext = SSLContextBuilder
                    .create()
                    .loadTrustMaterial(null, (certificate, authType) -> true) <= How to throw exception for this line
                    .build();
    }
    catch (KeyManagementException | NoSuchAlgorithmException | KeyStoreException e) {
        throw new IllegalStateException(e);
    }
}

以下是我的junit測試：

@RunWith(PowerMockRunner.class)
@PrepareForTest({SSLContextBuilder.class})
public class testClass {

     public void testCase() {
           SSLContextBuilder sslContextBuilder = mock(SSLContextBuilder.class, RETURNS_DEEP_STUBS);
           PowerMockito.mockStatic(SSLContextBuilder.class);
           PowerMockito.when(SSLContextBuilder.create()).thenReturn(sslContextBuilder);
           PowerMockito.when(sslContextBuilder.loadTrustMaterial(null, (certificate, authType) -> true)).thenThrow(new NoSuchAlgorithmException());
     }
}

如果您以前遇到以下問題，我將不勝感激任何形式的幫助或知識共享。 謝謝！

Answer 1

因為您已經有一個模擬，所以可以使用thenThrow而不是thenReturn來使模擬拋出異常。

https://static.javadoc.io/org.mockito/mockito-core/2.2.9/org/mockito/stubbing/OngoingStubbing.html