Simulating remote HTTP servers for functional testing

This is a test fixture, which provides a very basic servlet that registers expected requests and logs access counts for each requested method/pathParts combination. If no expectation is registered for a particular method/pathParts, 404 is returned.

Usage is pretty simple:

@Rule
public TestHttpServer server = new TestHttpServer( "repos" );

@Test
public void run()
    throws Exception
{
    final String pathParts = "/repos/pathParts/to/something.txt";
    final String content = "this is the content";
    final String url = server.formatUrl( pathParts );
    server.expect( url, 200, content );

    final HttpGet request = new HttpGet( url );
    final CloseableHttpClient client = HttpClients.createDefault();
    CloseableHttpResponse response = null;

    InputStream stream = null;
    try
    {
        response = client.execute( request );
        stream = response.getEntity()
                         .getContent();
        final String result = IOUtils.toString( stream );

        assertThat( result, notNullValue() );
        assertThat( result, equalTo( content ) );
    }
    finally
    {
        IOUtils.closeQuietly( stream );
        if ( response != null && response.getEntity() != null )
        {
            EntityUtils.consumeQuietly( response.getEntity() );
            IOUtils.closeQuietly( response );
        }

        if ( request != null )
        {
            request.reset();
        }

        if ( client != null )
        {
            IOUtils.closeQuietly( client );
        }
    }

    assertThat( server.getAccessesByPathKey()
                      .get( server.getAccessKey( CommonMethod.GET.name(), pathParts ) ), equalTo( 1 ) );
}