Map<String, Object> expectedParameters = new HashMap<String, Object>();
expectedParameters.put("aBoolean", Boolean.TRUE);
expectedParameters.put("aString", "aStringVariableValue");
expectedParameters.put("anInteger", 42);
verify(runtimeServiceMock).startProcessInstanceById(eq(MockProvider.EXAMPLE_PROCESS_DEFINITION_ID), isNull(String.class), isNull(String.class), argThat(new EqualsMap(expectedParameters)));
}