from auto_reverse.doc.schema import SchemaAccumulator


def test_single_object_schema():
    acc = SchemaAccumulator()
    acc.add({"id": 1, "name": "Ada"})
    schema = acc.schema()
    assert schema["type"] == "object"
    assert set(schema["properties"]) == {"id", "name"}


def test_merge_widens_optional_fields():
    acc = SchemaAccumulator()
    acc.add({"id": 1, "name": "Ada"})
    acc.add({"id": 2})  # name missing -> becomes optional
    schema = acc.schema()
    assert "id" in schema.get("required", [])
    assert "name" not in schema.get("required", [])


def test_array_schema():
    acc = SchemaAccumulator()
    acc.add([{"id": 1}, {"id": 2}])
    schema = acc.schema()
    assert schema["type"] == "array"
    assert schema["items"]["type"] == "object"


def test_empty_accumulator_returns_none():
    assert SchemaAccumulator().schema() is None