// Create a mock ModelBuilderResult with null effectiveModel but available rawModel
        ModelBuilderResult mockResult = new MockModelBuilderResult(
                null, // effectiveModel is null
                createMockModel("com.example", "test-project", "1.0.0"), // rawModel is available
                null // fileModel is null
                );

        String projectId = (String) extractProjectIdMethod.invoke(null, mockResult);