def test_snapshot_assert_matches(tmpdir):
"""Tests assertion matching."""
reference_file = tmpdir.join("test.json")
snapshot = Snapshot("test", data_dir=reference_file.dirname)
reference_content = "FOO"
reference_file.write(snapshot.serialize(reference_content))
snapshot.assert_matches(reference_content)
def test_snapshot_assert_matches_error(tmpdir):
"""Tests assertion errors out if the reference does not exist."""
reference_file = tmpdir.join("test.json")
snapshot = Snapshot("test", data_dir=reference_file.dirname)
assert snapshot.reference is None
with pytest.raises(AssertionError):
snapshot.assert_matches({"foo": "bar"})
def test_snapshot_assert_matches_generate_subdirs_existing(tmpdir):
"""Tests the snapshot is generated also with existing subdirectories."""
reference_file = tmpdir.join("subdir")
snapshot = Snapshot("subdir/test", data_dir=reference_file.dirname, generate=True)
assert snapshot.reference is None
# The assertion function reported nothing
assert snapshot.assert_matches({}) is None
# But the reference dir + file should now be created
assert reference_file.join("test.json").exists()
def test_snapshot_assert_matches_generate(tmpdir):
"""Tests the snapshot is generated if instructed to do so."""
reference_file = tmpdir.join("test.json")
snapshot = Snapshot("test", data_dir=reference_file.dirname, generate=True)
assert snapshot.reference is None
# The assertion function reported nothing
assert snapshot.assert_matches({}) is None
# But the reference file should now be created
assert reference_file.exists()