def test_grdvolume_no_outfile(grid):
"""
Test that grdvolume fails when output_type set to 'file' but no outfile is
specified.
"""
with pytest.raises(GMTInvalidInput):
grdvolume(grid=grid, output_type="file")
def test_grdvolume_format(grid):
"""
Test that correct formats are returned.
"""
grdvolume_default = grdvolume(grid=grid)
assert isinstance(grdvolume_default, pd.DataFrame)
grdvolume_array = grdvolume(grid=grid, output_type="numpy")
assert isinstance(grdvolume_array, np.ndarray)
grdvolume_df = grdvolume(grid=grid, output_type="pandas")
assert isinstance(grdvolume_df, pd.DataFrame)
def test_grdvolume_no_outgrid(grid, data):
"""
Test the expected output of grdvolume with no output file set.
"""
test_output = grdvolume(grid=grid,
contour=[200, 400, 50],
output_type="numpy")
npt.assert_allclose(test_output, data)
def test_grdvolume_outgrid(grid):
"""
Test the expected output of grdvolume with an output file set.
"""
with GMTTempFile(suffix=".csv") as tmpfile:
result = grdvolume(grid=grid,
contour=[200, 400, 50],
output_type="file",
outfile=tmpfile.name)
assert result is None # return value is None
assert os.path.exists(path=tmpfile.name) # check that outfile exists
def test_grdvolume_invalid_format(grid):
"""
Test that grdvolume fails with incorrect output_type argument.
"""
with pytest.raises(GMTInvalidInput):
grdvolume(grid=grid, output_type=1)