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Fix test function for empty ICGEM gdf file #345

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merged 3 commits into from
Aug 26, 2022
Merged

Fix test function for empty ICGEM gdf file #345

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97e5955
Fix test function for empty icgem file
santisoler Aug 26, 2022
7382cee
Improve code style
santisoler Aug 26, 2022
06f42a1
Merge branch 'main' into icgem-empty-file-test
santisoler Aug 26, 2022
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23 changes: 15 additions & 8 deletions harmonica/tests/test_icgem.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,8 @@

import numpy as np
import numpy.testing as npt
from pytest import raises
import pytest
from pytest import raises, warns

from .. import load_icgem_gdf

Expand Down Expand Up @@ -280,14 +281,20 @@ def test_corrupt_area(tmpdir):
load_icgem_gdf(corrupt)


def test_empty_file(tmpdir, recwarn):
"Empty ICGEM file"
@pytest.fixture(name="empty_fname")
def fixture_empty_fname(tmpdir):
"""
Return the path to a temporary empty file
"""
empty_fname = str(tmpdir.join("empty.gdf"))
with open(empty_fname, "w") as gdf_file:
gdf_file.write("")
with raises(IOError):
return empty_fname


def test_empty_file(empty_fname):
"Empty ICGEM file"
error = raises(IOError, match=r"Couldn't read \w+ field from gdf file header")
warn = warns(UserWarning, match=r"loadtxt: input contained no data")
with error, warn:
load_icgem_gdf(empty_fname)
assert len(recwarn) == 1
warning = recwarn.pop()
assert warning.category == UserWarning
assert "Empty input file" in str(warning.message)