def test_step_row_slice_with_start_and_step():
source = Resource("data/transform.csv")
target = transform(
source,
steps=[
steps.row_slice(start=1, stop=3, step=2),
],
)
assert target.schema == {
"fields": [
{
"name": "id",
"type": "integer"
},
{
"name": "name",
"type": "string"
},
{
"name": "population",
"type": "integer"
},
]
}
assert target.read_rows() == [
{
"id": 2,
"name": "france",
"population": 66
},
]
def test_step_row_slice_with_start_and_step():
source = Resource(path="data/transform.csv")
source.infer()
target = transform(
source,
steps=[
steps.row_slice(start=1, stop=3, step=2),
],
)
assert target.schema == source.schema
assert target.read_rows() == [
{"id": 2, "name": "france", "population": 66},
]
def test_step_row_slice_with_tail():
source = Resource(path="data/transform.csv")
source.infer()
target = transform(
source,
steps=[
steps.row_slice(tail=2),
],
)
assert target.schema == source.schema
assert target.read_rows() == [
{"id": 2, "name": "france", "population": 66},
{"id": 3, "name": "spain", "population": 47},
]
def test_step_row_slice_with_head():
source = Resource(path="data/transform.csv")
source.infer()
target = transform(
source,
steps=[
steps.row_slice(head=2),
],
)
assert target.schema == source.schema
assert target.read_rows() == [
{"id": 1, "name": "germany", "population": 83},
{"id": 2, "name": "france", "population": 66},
]
