| import os |
| import pytest |
| |
| from buildstream.utils import save_file_atomic |
| |
| |
| def test_save_new_file(tmpdir): |
| filename = os.path.join(str(tmpdir), 'savefile-success.test') |
| with save_file_atomic(filename, 'w') as f: |
| f.write('foo\n') |
| |
| assert os.listdir(str(tmpdir)) == ['savefile-success.test'] |
| with open(filename) as f: |
| assert f.read() == 'foo\n' |
| |
| |
| def test_save_over_existing_file(tmpdir): |
| filename = os.path.join(str(tmpdir), 'savefile-overwrite.test') |
| |
| with open(filename, 'w') as f: |
| f.write('existing contents\n') |
| |
| with save_file_atomic(filename, 'w') as f: |
| f.write('overwritten contents\n') |
| |
| assert os.listdir(str(tmpdir)) == ['savefile-overwrite.test'] |
| with open(filename) as f: |
| assert f.read() == 'overwritten contents\n' |
| |
| |
| def test_exception_new_file(tmpdir): |
| filename = os.path.join(str(tmpdir), 'savefile-exception.test') |
| |
| with pytest.raises(RuntimeError): |
| with save_file_atomic(filename, 'w') as f: |
| f.write('Some junk\n') |
| raise RuntimeError("Something goes wrong") |
| |
| assert os.listdir(str(tmpdir)) == [] |
| |
| |
| def test_exception_existing_file(tmpdir): |
| filename = os.path.join(str(tmpdir), 'savefile-existing.test') |
| |
| with open(filename, 'w') as f: |
| f.write('existing contents\n') |
| |
| with pytest.raises(RuntimeError): |
| with save_file_atomic(filename, 'w') as f: |
| f.write('Some junk\n') |
| raise RuntimeError("Something goes wrong") |
| |
| assert os.listdir(str(tmpdir)) == ['savefile-existing.test'] |
| with open(filename) as f: |
| assert f.read() == 'existing contents\n' |
| |
| |
| def test_attributes(tmpdir): |
| filename = os.path.join(str(tmpdir), 'savefile-attributes.test') |
| with save_file_atomic(filename, 'w') as f: |
| assert f.real_filename == filename |
| assert f.name != filename |