Question

SET @row := NULL;
SELECT
    SomeColumn,
    AnotherColumn
FROM (
    SELECT
        CASE @id <=> SomeColumn AND @row IS NOT NULL 
            WHEN TRUE THEN @row := @row+1 
            ELSE @row := 0 
        END AS rownum,
        @id := SomeColumn AS SomeColumn,
        AnotherColumn
    FROM
        SomeTable
    ORDER BY
        SomeColumn, -AnotherColumn DESC
) _values
WHERE rownum = 0
ORDER BY SomeColumn;

在运行测试用例时，@RunWith(PowerMockRunner.class) @PrepareForTest({ConnectionFactory.class, Proxy.class}) public class ConnectionFactoryTest { @InjectMocks private ConnectionFactory connectionFactory; @Mock private Proxy proxy; @Mock private InetSocketAddress inetSocketAddress; @Before public void setUp() throws Exception { MockitoAnnotations.initMocks(this); PowerMockito.mockStatic(Proxy.class); PowerMockito.whenNew(InetSocketAddress.class).withArguments(Mockito.anyString(), Mockito.anyInt()).thenReturn(inetSocketAddress); PowerMockito.whenNew(Proxy.class).withArguments(Proxy.Type.SOCKS, Mockito.any(InetSocketAddress.class)).thenReturn(proxy); } @Test public void testInitializeProxy() throws Exception { connectionFactory.getHttpURLConnection(Mockito.any(URL.class)); } } public class ConnectionFactory implements HttpURLConnectionFactory { private String proxyHost; private Integer proxyPort; Proxy proxy; public HttpURLConnection getHttpURLConnection(URL url) throws IOException { InetSocketAddress inetSocketAddress = new InetSocketAddress(proxyHost, proxyPort); // error occurs here proxy = new Proxy(Proxy.Type.SOCKS, inetSocketAddress); return (HttpURLConnection) url.openConnection(proxy); } }和new InetSocketAddress会调用anyString()，但仍然会引发anyInt()。在这方面，欢迎任何建议。

NullPointerException

上面添加了错误跟踪。在ConnectionFactoryTest类中执行测试方法testInitializeProxy（）时发生此错误

Answer 1

您尚未初始化error: pattern cannot match values of type 'State' case (.scan, .stopScanning): State.idle ~^~~~。

因此，在您实际初始化成员变量之前，该成员变量为proxyHost。

InetSocketAddress抛出空指针异常

1 个答案: