def test_convert_units(self):
"""
Should convert header units to plot units.
"""
fig = plt.figure()
ax = fig.add_subplot(111)
splt = SEGYPlotManager(ax, self.segy)
# should correctly perform unit conversions for distance
splt.DISTANCE_UNIT = 'km'
self.assertEqual(splt._convert_units('offset', [1000]), [1])
# should correctly perform unit conversions for time
splt.TIME_UNIT = 's'
self.assertEqual(splt._convert_units('delay', [1000]), [1])
def test_get_units(self):
"""
Should return (segy units, plot units) or None.
"""
fig = plt.figure()
ax = fig.add_subplot(111)
splt = SEGYPlotManager(ax, self.segy)
splt.DISTANCE_UNIT = 'distance_unit_marker'
splt.TIME_UNIT = 'time_unit_marker'
for key in TRACE_HEADER_KEYS:
if key in splt.SEGY_TIME_UNITS:
# should return TIME_UNIT for a time attribute
self.assertEqual(splt._get_units(key)[1],
'time_unit_marker')
elif key in splt.SEGY_DISTANCE_UNITS:
# should return DISTANCE_UNIT for a distance attribute
self.assertEqual(splt._get_units(key)[1],
'distance_unit_marker')
else:
# should return None values are unitless
self.assertEqual(splt._get_units(key), None)
def test_get_header_value(self):
"""
Should be able to use aliases to get unit-converted values
from headers.
"""
fig = plt.figure()
ax = fig.add_subplot(111)
splt = SEGYPlotManager(ax, self.segy)
# should return exact header values when convert_units=False
tr = self.segy.traces[0]
for alias in splt.SEGY_HEADER_ALIASES:
key = splt.SEGY_HEADER_ALIASES[alias]
value = splt.get_header_value(tr.header, alias,
convert_units=False)
_value = tr.header.__getattribute__(key)
self.assertEqual(value, _value)
# default should return header values in the plot units
splt.DISTANCE_UNIT = 'km'
alias = 'offset'
key = splt.SEGY_HEADER_ALIASES[alias]
scaled_value = splt.get_header_value(tr.header, alias)
header_value = tr.header.__getattribute__(key)
self.assertEqual(np.round(scaled_value, decimals=3),
header_value/1000.)
