Question

I’m trying to mock the RabbitMQ ConnectionFactory object to return a mocked connection, using scalatest and mockito. Below is an example test that I am using:

class RabbitMQMockTest extends FunSuite with MockitoSugar {
    test("RabbitMQ ConnectionFactory is correctly mocked") {
        def connectionFactory = mock[ConnectionFactory]
        def connection = mock[Connection]

        when(connectionFactory.newConnection()).thenReturn(connection)
        println(connectionFactory.newConnection())

        assert(connectionFactory.newConnection() != null)
    }
}

This always fails and the println statement always prints “null”. I am very new to using these technologies together and was wondering if anyone had any advice or could let me know if I’m doing anything wrong. Thanks in advance!

Answer 1

Don’t accidentally define variables using ‘def’! I defined the mocks using ‘def’ instead of ‘val’ or ‘var’, so I created a method that returns a new mock every time, instead of a variable.