def test_step_cell_convert():
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_convert(value="n/a"),
],
)
assert target.schema == source.schema
assert target.read_rows() == [
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
]
def test_step_cell_convert_with_field_name():
source = Resource(path="data/transform.csv")
source.infer()
target = transform(
source,
steps=[
steps.cell_convert(value="n/a", field_name="name"),
],
)
assert target.schema == source.schema
assert target.read_rows() == [
{
"id": 1,
"name": "n/a",
"population": 83
},
{
"id": 2,
"name": "n/a",
"population": 66
},
{
"id": 3,
"name": "n/a",
"population": 47
},
]
def test_step_cell_convert():
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_convert(value="n/a"),
],
)
assert target.schema == {
"fields": [
{
"name": "id",
"type": "string"
},
{
"name": "name",
"type": "string"
},
{
"name": "population",
"type": "string"
},
]
}
assert target.read_rows() == [
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
{
"id": "n/a",
"name": "n/a",
"population": "n/a"
},
]
def test_step_cell_convert_with_field_name():
source = Resource(path="data/transform.csv")
target = transform(
source,
steps=[
steps.cell_convert(value="n/a", field_name="name"),
],
)
assert target.schema == {
"fields": [
{"name": "id", "type": "integer"},
{"name": "name", "type": "string"},
{"name": "population", "type": "integer"},
]
}
assert target.read_rows() == [
{"id": 1, "name": "n/a", "population": 83},
{"id": 2, "name": "n/a", "population": 66},
{"id": 3, "name": "n/a", "population": 47},
]