from app.discovery.attributes import is_derived_duplicate, merge_observation_attributes


def test_merge_keeps_product_values_and_drops_alias_duplicates() -> None:
    items = merge_observation_attributes(
        {
            "CPU": "Apple M5 - 10 Core CPU",
            "Display": '14.2" (3024x1964)',
            "RAM": "16GB LPDDR5X",
            "Speicher": "512GB SSD",
            "Grafik": "",
        },
        {"ram_gb": 16, "storage_gb": 512},
    )
    by_name = {item["raw_name"]: item for item in items}
    assert "ram_gb" not in by_name
    assert "storage_gb" not in by_name
    assert by_name["CPU"]["raw_value"] == "Apple M5 - 10 Core CPU"
    assert by_name["Display"]["raw_value"] == '14.2" (3024x1964)'
    assert by_name["RAM"]["normalized_value"] == 16
    assert by_name["RAM"]["attribute_key"] == "ram_gb"
    assert by_name["Speicher"]["normalized_value"] == 512
    assert "Grafik" not in by_name


def test_derived_duplicate_is_detected() -> None:
    assert is_derived_duplicate("ram_gb", {"ram", "cpu"})
    assert not is_derived_duplicate("cpu", {"ram", "cpu"})