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test: update --precision & --fail-under tests to really test the fix …
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…from #1317
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@nedbat
nedbat committed Feb 2, 2022
1 parent 73bb553 commit e8b4120
Showing 1 changed file with 51 additions and 38 deletions.
89 changes: 51 additions & 38 deletions tests/test_cmdline.py
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Expand Up @@ -1077,9 +1077,9 @@ def test_exit(self):


class CoverageReportingFake:
"""A fake Coverage.coverage test double."""
"""A fake Coverage.coverage test double for FailUnderTest methods."""
# pylint: disable=missing-function-docstring
def __init__(self, report_result, html_result, xml_result, json_report, lcov_result):
def __init__(self, report_result, html_result=0, xml_result=0, json_report=0, lcov_result=0):
self.config = CoverageConfig()
self.report_result = report_result
self.html_result = html_result
Expand Down Expand Up @@ -1111,39 +1111,52 @@ def json_report(self, *args_unused, **kwargs_unused):
def lcov_report(self, *args_unused, **kwargs_unused):
return self.lcov_result

@pytest.mark.parametrize("results, fail_under, cmd, ret", [
# Command-line switch properly checks the result of reporting functions.
((20, 30, 40, 50, 60), None, "report --fail-under=19", 0),
((20, 30, 40, 50, 60), None, "report --fail-under=21", 2),
((20, 30, 40, 50, 60), None, "html --fail-under=29", 0),
((20, 30, 40, 50, 60), None, "html --fail-under=31", 2),
((20, 30, 40, 50, 60), None, "xml --fail-under=39", 0),
((20, 30, 40, 50, 60), None, "xml --fail-under=41", 2),
((20, 30, 40, 50, 60), None, "json --fail-under=49", 0),
((20, 30, 40, 50, 60), None, "json --fail-under=51", 2),
((20, 30, 40, 50, 60), None, "lcov --fail-under=59", 0),
((20, 30, 40, 50, 60), None, "lcov --fail-under=61", 2),
# Configuration file setting properly checks the result of reporting.
((20, 30, 40, 50, 60), 19, "report", 0),
((20, 30, 40, 50, 60), 21, "report", 2),
((20, 30, 40, 50, 60), 29, "html", 0),
((20, 30, 40, 50, 60), 31, "html", 2),
((20, 30, 40, 50, 60), 39, "xml", 0),
((20, 30, 40, 50, 60), 41, "xml", 2),
((20, 30, 40, 50, 60), 49, "json", 0),
((20, 30, 40, 50, 60), 51, "json", 2),
((20, 30, 40, 50, 60), 59, "lcov", 0),
((20, 30, 40, 50, 60), 61, "lcov", 2),
# Command-line overrides configuration.
((20, 30, 40, 50, 60), 19, "report --fail-under=21", 2),
# Precision defined
((20, 30, 40, 50, 60), None, "report --fail-under=20.1 --precision=1", 2),
((20, 30, 40, 50, 60), None, "report --fail-under=19.9 --precision=1", 0),
])
def test_fail_under(results, fail_under, cmd, ret):
cov = CoverageReportingFake(*results)
if fail_under is not None:
cov.set_option("report:fail_under", fail_under)
with mock.patch("coverage.cmdline.Coverage", lambda *a,**kw: cov):
ret_actual = command_line(cmd)
assert ret_actual == ret

class FailUnderTest(CoverageTest):
"""Tests of the --fail-under handling in cmdline.py."""

@pytest.mark.parametrize("results, fail_under, cmd, ret", [
# Command-line switch properly checks the result of reporting functions.
((20, 30, 40, 50, 60), None, "report --fail-under=19", 0),
((20, 30, 40, 50, 60), None, "report --fail-under=21", 2),
((20, 30, 40, 50, 60), None, "html --fail-under=29", 0),
((20, 30, 40, 50, 60), None, "html --fail-under=31", 2),
((20, 30, 40, 50, 60), None, "xml --fail-under=39", 0),
((20, 30, 40, 50, 60), None, "xml --fail-under=41", 2),
((20, 30, 40, 50, 60), None, "json --fail-under=49", 0),
((20, 30, 40, 50, 60), None, "json --fail-under=51", 2),
((20, 30, 40, 50, 60), None, "lcov --fail-under=59", 0),
((20, 30, 40, 50, 60), None, "lcov --fail-under=61", 2),
# Configuration file setting properly checks the result of reporting.
((20, 30, 40, 50, 60), 19, "report", 0),
((20, 30, 40, 50, 60), 21, "report", 2),
((20, 30, 40, 50, 60), 29, "html", 0),
((20, 30, 40, 50, 60), 31, "html", 2),
((20, 30, 40, 50, 60), 39, "xml", 0),
((20, 30, 40, 50, 60), 41, "xml", 2),
((20, 30, 40, 50, 60), 49, "json", 0),
((20, 30, 40, 50, 60), 51, "json", 2),
((20, 30, 40, 50, 60), 59, "lcov", 0),
((20, 30, 40, 50, 60), 61, "lcov", 2),
# Command-line overrides configuration.
((20, 30, 40, 50, 60), 19, "report --fail-under=21", 2),
])
def test_fail_under(self, results, fail_under, cmd, ret):
cov = CoverageReportingFake(*results)
if fail_under is not None:
cov.set_option("report:fail_under", fail_under)
with mock.patch("coverage.cmdline.Coverage", lambda *a,**kw: cov):
self.command_line(cmd, ret)

@pytest.mark.parametrize("result, cmd, ret, msg", [
(20.5, "report --fail-under=20.4 --precision=1", 0, ""),
(20.5, "report --fail-under=20.6 --precision=1", 2,
"Coverage failure: total of 20.5 is less than fail-under=20.6\n"),
(20.12345, "report --fail-under=20.1235 --precision=5", 2,
"Coverage failure: total of 20.12345 is less than fail-under=20.12350\n"),
])
def test_fail_under_with_precision(self, result, cmd, ret, msg):
cov = CoverageReportingFake(report_result=result)
with mock.patch("coverage.cmdline.Coverage", lambda *a,**kw: cov):
self.command_line(cmd, ret)
assert self.stdout() == msg

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