Argument matching when equals() cannot be used.

[Marcel Overdijk]

I like to test some argument matching. My argument's class is 3th
party class but the equals method does not work, so it cannot match
the argument.

How can I solve this. I was reading about hamcrest but can't see the
light (yet).

Any pointer to a code example would be helpful.

This the argument I'm talking about:
http://code.google.com/intl/nl/appengine/docs/java/javadoc/com/google/appengine/api/urlfetch/HTTPRequest.html
when(urlFetchService.fetch(httpRequest).thenReturn(httpResponse);

Cheers,
Marcel

[Marcel Overdijk]

To answer my own question: I used the ArgumentMatcher to create a
custom matcher as seen below.
I called in my test like: when(urlFetchService.fetch(matchesRequest
(url, HTTPMethod.GET))).thenReturn(httpResponse);

package com.footdex.test.appengine.api.urlfetch;

import static org.mockito.Matchers.argThat;
import java.net.URL;
import org.mockito.ArgumentMatcher;
import com.google.appengine.api.urlfetch.HTTPMethod;
import com.google.appengine.api.urlfetch.HTTPRequest;

public class HTTPRequestMatcher extends ArgumentMatcher<HTTPRequest> {

URL url;
HTTPMethod method;

public HTTPRequestMatcher(URL url, HTTPMethod method) {
this.url = url;
this.method = method;
}

@Override
public boolean matches(Object argument) {
HTTPRequest request = (HTTPRequest)argument;
return request.getURL().equals(url) && request.getMethod
().equals(method);
}

public static HTTPRequest matchesRequest(URL url, HTTPMethod
method) {
return argThat(new HTTPRequestMatcher(url, method));
}
}

[szczepiq]

Hi,

For stubbing purposes: If equals() arg matching don't work you can:
- implement a matcher (as you did)
- relax the stubbing and use 'any()' argument matcher

For verification you can also use ArgumentCaptor to capture args for
future verifications.

Hope that helps!
Cheers,
Szczepan Faber

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[Marcel Overdijk]

Thanks Szczepan,

As you have seen above I already implemented the custom matcher.
I needed this as I wanted to test that some specific argument values
were passed to my mock, so any() was not sufficient.

Cheers,
Marcel