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import pytest
@pytest.fixture
def testcases_initial(testdir):
testdir.makeconftest(
"""
import pytest
import math
from syrupy.extensions.amber import AmberSnapshotExtension
class CustomSnapshotExtension(AmberSnapshotExtension):
def matches(self, *, serialized_data, snapshot_data):
try:
a = float(serialized_data)
b = float(snapshot_data)
return math.isclose(a, b, rel_tol=1e-5)
except:
return False
@pytest.fixture
def snapshot_custom(snapshot):
return snapshot.use_extension(CustomSnapshotExtension)
"""
)
return {
"passed": (
"""
def test_passed_custom(snapshot_custom):
assert snapshot_custom == 3.0
"""
),
"failed": (
"""
def test_passed_custom(snapshot_custom):
# this comment is required or the test breaks
assert snapshot_custom == 4.0
"""
),
}
@pytest.fixture
def generate_snapshots(testdir, testcases_initial):
testdir.makepyfile(test_file=testcases_initial["passed"])
result = testdir.runpytest("-v", "--snapshot-update")
return result, testdir, testcases_initial
@pytest.mark.xfail(strict=False)
def test_generated_snapshots(generate_snapshots):
result = generate_snapshots[0]
result.stdout.re_match_lines((r"1 snapshot generated\.",))
assert "snapshots unused" not in result.stdout.str()
assert result.ret == 0
@pytest.mark.xfail(strict=False)
def test_approximate_match(generate_snapshots, plugin_args_fails_xdist):
testdir = generate_snapshots[1]
testdir.makepyfile(
test_file="""
def test_passed_custom(snapshot_custom):
assert snapshot_custom == 3.2
"""
)
result = testdir.runpytest("-v", *plugin_args_fails_xdist)
result.stdout.re_match_lines((r"test_file.py::test_passed_custom PASSED",))
assert result.ret == 0
@pytest.mark.xfail(strict=False)
def test_failed_snapshots(generate_snapshots):
testdir = generate_snapshots[1]
testdir.makepyfile(test_file=generate_snapshots[2]["failed"])
result = testdir.runpytest("-v")
result.stdout.re_match_lines((r"1 snapshot failed\.",))
assert result.ret == 1
@pytest.mark.xfail(strict=False)
def test_updated_snapshots(generate_snapshots, plugin_args_fails_xdist):
_, testdir, initial = generate_snapshots
testdir.makepyfile(test_file=initial["failed"])
result = testdir.runpytest("-v", "--snapshot-update", *plugin_args_fails_xdist)
result.stdout.re_match_lines((r"1 snapshot updated\.",))
assert result.ret == 0
|
