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from datetime import datetime, timedelta
from contextlib import nullcontext as does_not_raise
import pytest
from pymetkit import parse_mars_request, MarsRequest, MetKitException
request = """
retrieve,
class=od,
domain=g,
expver=0001,
levtype=sfc,
stream=enfo,
date=-1,
time=12,
param=151.128,
grid=O640,
step=0/to/24/by/6,
target=test.grib,
type=em
retrieve,
class=od,
domain=g,
expver=0001,
levtype=pl,
stream=enfo,
date=-1,
time=12,
param=129,
levelist=500,
grid=O640,
step=0/to/24/by/6,
target=test.grib,
type=em
"""
yesterday = (datetime.today() - timedelta(days=1)).strftime("%Y%m%d")
def test_parse_file(tmpdir):
request_file = f"{tmpdir}/requests"
with open(request_file, "w") as f:
f.write(request)
requests = parse_mars_request(open(request_file, "r"))
assert len(requests) == 2
for req in requests:
assert req.verb() == "retrieve"
assert len(req["step"]) == 5
assert req["date"] == yesterday
assert "class" in requests[0]
assert requests[1]["levelist"] == "500"
# @todo: [1] no longer raises an exception. Disable until METK-126 is resolved.
@pytest.mark.parametrize(
"req_str, length, steps, strict, expectation",
[
[request, 2, 5, False, does_not_raise()],
# [request, 2, 5, True, pytest.raises(MetKitException)],
[
"retrieve,class=od,date=-1,time=12,param=129,step=12,target=test.grib",
1,
1,
False,
does_not_raise(),
],
],
)
def test_parse_string(req_str, length, steps, strict, expectation):
with expectation:
requests = parse_mars_request(req_str, strict)
assert len(requests) == length
for req in requests:
assert req.num_values("step") == steps
def test_empty_request(tmpdir):
request_file = f"{tmpdir}/requests"
with open(request_file, "w") as f:
f.write("")
requests = parse_mars_request(open(request_file, "r"))
assert len(requests) == 0
def test_new_request():
req = MarsRequest("retrieve")
assert req.verb() == "retrieve"
req = MarsRequest("request", class_="od", type="pf", date=["20200101", "20200102"])
assert req["class"] == "od"
assert req["type"] == "pf"
assert req["date"] == ["20200101", "20200102"]
def test_request_from_expand():
req = MarsRequest(
"retrieve",
**{
"class": "od",
"domain": "g",
"date": "-1",
"expver": "0001",
"step": range(0, 13, 6),
},
)
expanded = req.expand()
assert expanded.verb() == req.verb()
assert expanded["date"] == yesterday
assert "param" in expanded
expanded.validate()
assert req == expanded
# @todo: [0] and [1] no longer raise an exception. Disable until METK-126 is resolved.
@pytest.mark.parametrize(
"extra_kv",
[
# {"levelist": [500]},
# {"type": "cf", "number": [1, 2]},
{"class": "invalid"}
],
)
def test_request_validate(extra_kv):
request = {
"class": "od",
"domain": "g",
"date": "-1",
"expver": "0001",
"step": range(0, 13, 6),
"levtype": "sfc",
}
request.update(extra_kv)
req = MarsRequest("retrieve", **request)
with pytest.raises(MetKitException):
req.validate()
@pytest.mark.parametrize(
"extra_kv, expectation",
[
[{"levtype": "pl", "date": "-1"}, pytest.raises(MetKitException)],
[{"levtype": "sfc", "date": "-1", "type": "em"}, pytest.raises(ValueError)],
[{"levtype": "sfc", "date": "20230101"}, does_not_raise()],
],
)
def test_request_merge(extra_kv, expectation):
request = {
"class": "od",
"domain": "g",
"expver": "0001",
"step": range(0, 13, 6),
}
req = MarsRequest("retrieve", **request, date="-1", levtype="sfc")
other_req = MarsRequest("retrieve", **request, **extra_kv)
with expectation:
req.merge(other_req)
@pytest.mark.parametrize(
"verb, updates, expected",
[["retrieve", {"date": 20230101, "param": 130}, True], ["compute", {}, False]],
)
def test_request_equality(verb, updates, expected):
init_request = {
"class": "od",
"domain": "g",
"date": "20230101",
"param": "130",
"expver": "0001",
"step": range(0, 13, 6),
}
req = MarsRequest(
"retrieve",
**init_request,
)
second_request = {**init_request, **updates}
req2 = MarsRequest(verb, **second_request)
assert (req == req2) == expected
|
