Example of a JMock test for mocking

JMockEncodeListTest.java

@Test
public void shouldEncodeListOfStrings() {
    final List<String> stringList = asList("Uno", "Dos", "Tres");

    context.checking(new Expectations() {{
        oneOf(bsonWriter).writeStartArray();
        oneOf(bsonWriter).writeString("Uno");
        oneOf(bsonWriter).writeString("Dos");
        oneOf(bsonWriter).writeString("Tres");
        oneOf(bsonWriter).writeEndArray();
    }});

    iterableCodec.encode(bsonWriter, stringList);
}