def test_step_cell_format():
    source = Resource(path="data/transform.csv")
    source.infer()
    source.schema.get_field("id").type = "string"
    source.schema.get_field("population").type = "string"
    target = transform(
        source,
        steps=[
            steps.cell_format(template="Prefix: {0}"),
        ],
    )
    assert target.schema == source.schema
    assert target.read_rows() == [
        {
            "id": "Prefix: 1",
            "name": "Prefix: germany",
            "population": "Prefix: 83"
        },
        {
            "id": "Prefix: 2",
            "name": "Prefix: france",
            "population": "Prefix: 66"
        },
        {
            "id": "Prefix: 3",
            "name": "Prefix: spain",
            "population": "Prefix: 47"
        },
    ]
def test_step_cell_format_with_name():
    source = Resource(path="data/transform.csv")
    source.infer()
    target = transform(
        source,
        steps=[
            steps.cell_format(template="Prefix: {0}", field_name="name"),
        ],
    )
    assert target.schema == source.schema
    assert target.read_rows() == [
        {
            "id": 1,
            "name": "Prefix: germany",
            "population": 83
        },
        {
            "id": 2,
            "name": "Prefix: france",
            "population": 66
        },
        {
            "id": 3,
            "name": "Prefix: spain",
            "population": 47
        },
    ]
def test_step_cell_format():
    source = Resource(path="data/transform.csv")
    target = transform(
        source,
        steps=[
            steps.field_update(name="id", type="string"),
            steps.field_update(name="population", type="string"),
            steps.cell_format(template="Prefix: {0}"),
        ],
    )
    assert target.schema == {
        "fields": [
            {
                "name": "id",
                "type": "string"
            },
            {
                "name": "name",
                "type": "string"
            },
            {
                "name": "population",
                "type": "string"
            },
        ]
    }
    assert target.read_rows() == [
        {
            "id": "Prefix: 1",
            "name": "Prefix: germany",
            "population": "Prefix: 83"
        },
        {
            "id": "Prefix: 2",
            "name": "Prefix: france",
            "population": "Prefix: 66"
        },
        {
            "id": "Prefix: 3",
            "name": "Prefix: spain",
            "population": "Prefix: 47"
        },
    ]