def test_GdalImageReader_usable():
"""
Test that GdalImageReader class reports as usable when GDAL is importable.
"""
# Mock module value of ``osgeo`` to something not None to simulate
# something having been imported.
with mock.patch.dict('smqtk.algorithms.image_io.gdal_io.__dict__',
{'osgeo': object()}):
assert GdalImageReader.is_usable() is True
def test_GdalImageReader_not_usable_missing_osgeo():
"""
Test that class reports as not usable when GDAL is not importable (set
to None in module).
"""
# Catch expected warnings to not pollute output.
with warnings.catch_warnings():
warnings.filterwarnings('ignore', category=UserWarning)
# Mock module value of ``osgeo`` to None.
with mock.patch.dict('smqtk.algorithms.image_io.gdal_io.__dict__',
{'osgeo': None}):
assert GdalImageReader.is_usable() is False
def test_GdalImageReader_not_usable_missing_osgeo():
"""
Test that class reports as not usable when GDAL is not importable (set
to None in module).
"""
# Catch expected warnings to not pollute output.
with warnings.catch_warnings():
warnings.filterwarnings('ignore', category=UserWarning)
# Mock module value of ``osgeo`` to None.
with mock.patch.dict('smqtk.algorithms.image_io.gdal_io.__dict__',
{'osgeo': None}):
assert GdalImageReader.is_usable() is False
@pytest.mark.skipif(not GdalImageReader.is_usable(),
reason="GdalImageReader implementation is not usable in "
"the current environment.")
class TestGdalImageReader (unittest.TestCase):
"""
Tests for ``GdalImageReader`` class.
If this was not skipped, ``osgeo`` must have been importable.
"""
def test_init_default(self):
"""
Test that construction with default parameters works.
"""
GdalImageReader()