SolrPing.Process：检查的异常对此方法无效

Question

I am testing the exception condition for solr ping call. Here is the code snippet. Solrj version 5.2.0

@Test
public void testPingSolrWhenServerDown2() throws Exception {
  pingSolr = new PingSolr();
  SolrClient mockedSolrClient = Mockito.mock(SolrClient.class);
  SolrPing mockedSolrPing = Mockito.mock(SolrPing.class);
  PowerMockito.whenNew(SolrPing.class).withNoArguments().thenReturn(mockedSolrPing);
  Mockito.doThrow(new IOException()).when(mockedSolrPing).process(mockedSolrClient);
  pingSolr.ping(mockedSolrClient);
}

I am getting the following error:

org.mockito.exceptions.base.MockitoException: 
Checked exception is invalid for this method!
Invalid: java.io.IOException
    at org.apache.solr.client.solrj.request.SolrPing.createResponse(SolrPing.java:36)
    at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:134)
    at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:152)
    at c.i.j.s.i.PingSolrTest.testPingSolrWhenServerDown2(PingSolrTest.java:65)

This is saying IOException is an invalid checked exception, which is not allowed with mockito. The same is happening for SolrServerException in another test case.

But SolrPing.process method (extended from SolrRequest ) does throw the exception. SolrRequest.process .

One thing I did observe that createResponse does not throw any exception. But When I am mocking the process call itself, why it is going to the further deeper calls .

Answer 1

The method you are trying to mock

public final T process(SolrClient client, String collection)

is marked final which cannot be mocked by Mockito . Use PowerMockito instead, to mock methods that are static or final .

Answer 2

I would consider to change the approach. I would move method call to Solr into protected method and with spy stub it as you need.

Sure it is less strong than PowerMock real interaction mocking as well it require to create a dummy method that is package visible.

But it was necessary for us since we had conflict with other test framework and it became habit that I accept and like since I don't need PowerMock anymore