java Mockito Checked 异常对此方法无效
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Mockito Checked exception is invalid for this method
提问by Catfish
I'm getting the error Checked exception is invalid for this methodwhen trying to use this mock:
Checked exception is invalid for this method尝试使用此模拟时出现错误：
InitialContext mockContext;
mockContext = mock(InitialContext.class);
when((DataSource) mockContext.lookup("java:comp/env/jdbc/foo")).thenThrow(new ConnectionFactoryException("test")); // <-- Fails on this line
@Test
public void shouldThrowExceptionIfDataSourceDoesNotExist() throws ConnectionFactoryException {
assertThatExceptionOfType(ConnectionFactoryException.class)
.isThrownBy(() -> { new DataSourceFactory(mockContext).getDataSource("foo"); })
.withMessage("Unable to find jdbc/foo");
}
Class I'm trying to test:
我正在尝试测试的类：
public class DataSourceFactory {
// Dependencies to be injected
private InitialContext context;
public DataSourceFactory(InitialContext context) throws ConnectionFactoryException {
if(context == null) {
throw new ConnectionFactoryException("context can't be null");
}
this.context = context;
}
public DataSource getDataSource(String dataSourceName) throws ConnectionFactoryException {
if(dataSourceName == null) {
throw new ConnectionFactoryException("dataSourceName can't be null");
}
// Ensure we have the correct syntax for the datasource name
if(!dataSourceName.startsWith("jdbc/")) {
dataSourceName = "jdbc/" + dataSourceName;
}
try {
System.out.println("java:comp/env/" + dataSourceName);
DataSource dataSource = (DataSource) context.lookup("java:comp/env/" + dataSourceName);
return dataSource;
} catch (NamingException e) {
throw new ConnectionFactoryException("Unable to find " + dataSourceName, e);
}
}
}
I know I've read that I shouldn't mock objects I don't own, but I can't figure out how to test the getDataSource()method without mocking InitialContext.
我知道我已经读过我不应该模拟我不拥有的对象，但我无法弄清楚如何在不模拟的getDataSource()情况下测试该方法InitialContext。
回答by Mureinik
lookupindeed doesn't throw a ConnectionFactoryException- your code does. Instead, you should throw the correct exception - a NamingException, and test that your code handles it as expected (i.e., throws up a ConnectionFactoryException`):
lookup确实不会抛出ConnectionFactoryException- 您的代码会。相反，您应该抛出正确的异常 - a NamingException，并测试您的代码是否按预期处理它（即抛出 ConnectionFactoryException`）：
when(mockContext.lookup("java:comp/env/jdbc/foo"))
.thenThrow(new NamingException("test"));
