def METHOD_NAME():
    document = document_fixture(
        files=[
            file_fixture(spdx_id="SPDXRef-File"),
            file_fixture(spdx_id="SPDXRef-2"),
            file_fixture(spdx_id="SPDXRef-3"),
        ],
        packages=[package_fixture(spdx_id="SPDXRef-2"), package_fixture(spdx_id=DOCUMENT_SPDX_ID)],
        snippets=[snippet_fixture(spdx_id="SPDXRef-2"), snippet_fixture(spdx_id="SPDXRef-3")],
    )
    context = ValidationContext(spdx_id=document.creation_info.spdx_id, element_type=SpdxElementType.DOCUMENT)
    validation_messages: List[ValidationMessage] = validate_full_spdx_document(document)
    assert validation_messages == [
        ValidationMessage(
            "every spdx_id must be unique within the document, but found the following duplicates: ['SPDXRef-2', "
            f"'SPDXRef-3', '{DOCUMENT_SPDX_ID}']",
            context,
        )
    ]