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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
"""Tests for helpers in report.py"""
import pytest
from coverage.exceptions import CoverageException
from coverage.report import render_report
from tests.coveragetest import CoverageTest
class FakeReporter:
"""A fake implementation of a one-file reporter."""
report_type = "fake report file"
def __init__(self, output="", error=False):
self.output = output
self.error = error
self.morfs = None
def report(self, morfs, outfile):
"""Fake."""
self.morfs = morfs
outfile.write(self.output)
if self.error:
raise CoverageException("You asked for it!")
class RenderReportTest(CoverageTest):
"""Tests of render_report."""
def test_stdout(self):
fake = FakeReporter(output="Hello!\n")
msgs = []
render_report("-", fake, [pytest, "coverage"], msgs.append)
assert fake.morfs == [pytest, "coverage"]
assert self.stdout() == "Hello!\n"
assert not msgs
def test_file(self):
fake = FakeReporter(output="Gréètings!\n")
msgs = []
render_report("output.txt", fake, [], msgs.append)
assert self.stdout() == ""
with open("output.txt", "rb") as f:
assert f.read().rstrip() == b"Gr\xc3\xa9\xc3\xa8tings!"
assert msgs == ["Wrote fake report file to output.txt"]
def test_exception(self):
fake = FakeReporter(error=True)
msgs = []
with pytest.raises(CoverageException, match="You asked for it!"):
render_report("output.txt", fake, [], msgs.append)
assert self.stdout() == ""
self.assert_doesnt_exist("output.txt")
assert not msgs
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