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# Copyright (c) 2016 MetPy Developers. |
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# Distributed under the terms of the BSD 3-Clause License. |
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# SPDX-License-Identifier: BSD-3-Clause |
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import numpy as np |
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import pytest |
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from metpy.io.cdm import Dataset |
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from metpy.io.tools import hexdump, UnitLinker |
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from metpy.testing import assert_array_equal |
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from metpy.units import units |
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@pytest.fixture() |
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def test_var(): |
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r'Fixture to create a dataset and variable for tests' |
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ds = Dataset() |
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ds.createDimension('x', 5) |
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var = ds.createVariable('data', 'f4', ('x',), 5) |
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var[:] = np.arange(5) |
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return var |
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def test_unit_linker(test_var): |
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r'Test that UnitLinker successfully adds units' |
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test_var.units = 'meters' |
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new_var = UnitLinker(test_var) |
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assert_array_equal(new_var[:], np.arange(5) * units.m) |
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def test_unit_linker_get_units(test_var): |
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r'Test that we can get the units from UnitLinker' |
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test_var.units = 'knots' |
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new_var = UnitLinker(test_var) |
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assert new_var.units == units('knots') |
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def test_unit_linker_missing(test_var): |
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r'Test that UnitLinker works with missing units' |
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new_var = UnitLinker(test_var) |
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assert_array_equal(new_var[:], np.arange(5)) |
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def test_unit_linker_bad(test_var): |
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r'Test that UnitLinker ignores bad unit strings' |
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test_var.units = 'badunit' |
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new_var = UnitLinker(test_var) |
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assert_array_equal(new_var[:], np.arange(5)) |
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def test_unit_override(test_var): |
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r"Test that we can override a variable's bad unit string" |
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test_var.units = 'C' |
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new_var = UnitLinker(test_var) |
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new_var.units = 'degC' |
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assert_array_equal(new_var[:], np.arange(5) * units.degC) |
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def test_unit_override_obj(test_var): |
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r'Test that we can override with an object' |
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test_var.units = 'C' |
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new_var = UnitLinker(test_var) |
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new_var.units = units.degC |
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assert_array_equal(new_var[:], np.arange(5) * units.degC) |
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def test_attribute_forwarding(test_var): |
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r'Test that we are properly able to access attributes from the variable' |
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test_var.att = 'abc' |
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new_var = UnitLinker(test_var) |
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assert new_var.att == test_var.att |
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def test_hexdump(): |
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r'Test hexdump tool' |
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data = bytearray([77, 101, 116, 80, 121]) |
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assert hexdump(data, 4, width=8) == '4D657450 79------ 0 0 MetPy' |
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Unidata /
MetPy
