def test_invalid_type():
"""Test to ensure a TypeError or ValueError is raised
when an invalid value is provided to calculate_hour_angle_degrees()."""
with pytest.raises(ValueError):
# Test with NaN value
assert calculate_hour_angle_degrees(
local_standard_time="February 3, 2020 10:30 AM",
longitude_degrees=nan,
)
with pytest.raises(ValueError):
# Test with infinite value
assert calculate_hour_angle_degrees(
local_standard_time="February 3, 2020 10:30 AM",
longitude_degrees=inf,
)
def test_invalid_range():
"""Test to ensure a ValueError is raised when a value
outside the specified range is provided to
calculate_hour_angle_degrees() for `longitude_degrees`."""
with pytest.raises(ValueError):
# Test with too-low value
assert calculate_hour_angle_degrees(
local_standard_time="February 3, 2020 10:30 AM",
longitude_degrees=-10,
)
with pytest.raises(ValueError):
# Test with too-high value
assert calculate_hour_angle_degrees(
local_standard_time="February 3, 2020 10:30 AM",
longitude_degrees=400,
)
def test_naive_datetime():
"""Run a test with a naive datetime object,
which should result in a `ValueError`.
"""
with pytest.raises(ValueError):
assert calculate_hour_angle_degrees(
local_standard_time="February 3, 2020 10:30 AM",
longitude_degrees=89.4,
)
def test_calculate_hour_angle(dt, longitude):
"""Functional test to ensure the calculate_hour_angle() method
runs properly given valid arguments."""
assert isinstance(
calculate_hour_angle_degrees(
local_standard_time=dt, longitude_degrees=longitude
),
float,
)
def test_known_values():
"""Run a test with a known answer to ensure
calculate_hour_angle() is giving the expected output.
These known values are taken from:
1) Duffie & Beckman (2006) Example 1.6.1
"""
"""`local_standard_time` here corresponds to
10:30 AM solar time for the day and location."""
assert calculate_hour_angle_degrees(
local_standard_time="February 13, 2020 10:42 AM -06:00",
longitude_degrees=89.4,
) == pytest.approx(-22.46533)
def test_calculate_hour_angle_iterable():
"""Functional test to ensure the calculate_hour_angle() method
runs properly given valid iterables."""
assert isinstance(
calculate_hour_angle_degrees(
local_standard_time=[
"February 13, 2020 10:42 AM -06:00",
"February 23, 2020 10:42 AM -06:00",
],
longitude_degrees=89.4,
),
np.ndarray,
)
assert isinstance(
calculate_hour_angle_degrees(
local_standard_time=[
"February 13, 2020 10:42 AM -06:00",
"February 23, 2020 10:42 AM -06:00",
],
longitude_degrees=89.4,
)[0],
float,
)