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[TST] Make jpl units instantiated with datetimes consistent with mpl converters #25815

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merged 2 commits into from
Feb 7, 2024
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[TST] Make jpl units instantiated with datetimes consistent with mpl converters #25815

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e25f65b
[TST] Make jpl units instantiated with datetimes consistent with mpl …
ksunden May 4, 2023
231704f
[TST] Add unit test for consistency of datetime units between mpl.dat…
ksunden May 4, 2023
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4 changes: 1 addition & 3 deletions lib/matplotlib/testing/jpl_units/EpochConverter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,9 +12,7 @@ class EpochConverter(units.ConversionInterface):
classes.
"""

# julian date reference for "Jan 1, 0001" minus 1 day because
# Matplotlib really wants "Jan 0, 0001"
jdRef = 1721425.5 - 1
jdRef = 1721425.5

@staticmethod
def axisinfo(unit, axis):
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8 changes: 4 additions & 4 deletions lib/matplotlib/tests/test_axes.py
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Expand Up @@ -856,8 +856,8 @@ def test_axvspan_epoch():
units.register()

# generate some data
t0 = units.Epoch("ET", dt=datetime.datetime(2009, 1, 20))
tf = units.Epoch("ET", dt=datetime.datetime(2009, 1, 21))
t0 = units.Epoch("ET", dt=datetime.datetime(2009, 1, 21))
tf = units.Epoch("ET", dt=datetime.datetime(2009, 1, 22))
dt = units.Duration("ET", units.day.convert("sec"))

ax = plt.gca()
Expand All @@ -871,8 +871,8 @@ def test_axhspan_epoch():
units.register()

# generate some data
t0 = units.Epoch("ET", dt=datetime.datetime(2009, 1, 20))
tf = units.Epoch("ET", dt=datetime.datetime(2009, 1, 21))
t0 = units.Epoch("ET", dt=datetime.datetime(2009, 1, 21))
tf = units.Epoch("ET", dt=datetime.datetime(2009, 1, 22))
dt = units.Duration("ET", units.day.convert("sec"))

ax = plt.gca()
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15 changes: 13 additions & 2 deletions lib/matplotlib/tests/test_units.py
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Expand Up @@ -134,7 +134,7 @@ def test_jpl_bar_units():
day = units.Duration("ET", 24.0 * 60.0 * 60.0)
x = [0 * units.km, 1 * units.km, 2 * units.km]
w = [1 * day, 2 * day, 3 * day]
b = units.Epoch("ET", dt=datetime(2009, 4, 25))
b = units.Epoch("ET", dt=datetime(2009, 4, 26))
fig, ax = plt.subplots()
ax.bar(x, w, bottom=b)
ax.set_ylim([b - 1 * day, b + w[-1] + (1.001) * day])
Expand All @@ -149,13 +149,24 @@ def test_jpl_barh_units():
day = units.Duration("ET", 24.0 * 60.0 * 60.0)
x = [0 * units.km, 1 * units.km, 2 * units.km]
w = [1 * day, 2 * day, 3 * day]
b = units.Epoch("ET", dt=datetime(2009, 4, 25))
b = units.Epoch("ET", dt=datetime(2009, 4, 26))

fig, ax = plt.subplots()
ax.barh(x, w, left=b)
ax.set_xlim([b - 1 * day, b + w[-1] + (1.001) * day])


def test_jpl_datetime_units_consistent():
import matplotlib.testing.jpl_units as units
units.register()

dt = datetime(2009, 4, 26)
jpl = units.Epoch("ET", dt=dt)
dt_conv = munits.registry.get_converter(dt).convert(dt, None, None)
jpl_conv = munits.registry.get_converter(jpl).convert(jpl, None, None)
assert dt_conv == jpl_conv


def test_empty_arrays():
# Check that plotting an empty array with a dtype works
plt.scatter(np.array([], dtype='datetime64[ns]'), np.array([]))
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