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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
"""Test LCOV-based summary reporting for coverage.py."""
import textwrap
from tests.coveragetest import CoverageTest
import coverage
from coverage import env
class LcovTest(CoverageTest):
"""Tests of the LCOV reports from coverage.py."""
def create_initial_files(self):
"""
Helper for tests that handles the common ceremony so the tests can
show the consequences of changes in the setup.
"""
self.make_file("main_file.py", """\
#!/usr/bin/env python3
def cuboid_volume(l):
return (l*l*l)
def IsItTrue():
return True
""")
self.make_file("test_file.py", """\
#!/usr/bin/env python3
from main_file import cuboid_volume
import unittest
class TestCuboid(unittest.TestCase):
def test_volume(self):
self.assertAlmostEqual(cuboid_volume(2),8)
self.assertAlmostEqual(cuboid_volume(1),1)
self.assertAlmostEqual(cuboid_volume(0),0)
self.assertAlmostEqual(cuboid_volume(5.5),166.375)
""")
def get_lcov_report_content(self, filename="coverage.lcov"):
"""Return the content of an LCOV report."""
with open(filename, "r") as file:
file_contents = file.read()
return file_contents
def test_lone_file(self):
"""For a single file with a couple of functions, the lcov should cover
the function definitions themselves, but not the returns."""
self.make_file("main_file.py", """\
#!/usr/bin/env python3
def cuboid_volume(l):
return (l*l*l)
def IsItTrue():
return True
""")
expected_result = textwrap.dedent("""\
TN:
SF:main_file.py
DA:3,1,7URou3io0zReBkk69lEb/Q
DA:6,1,ilhb4KUfytxtEuClijZPlQ
DA:4,0,Xqj6H1iz/nsARMCAbE90ng
DA:7,0,LWILTcvARcydjFFyo9qM0A
LF:4
LH:2
end_of_record
""")
self.assert_doesnt_exist(".coverage")
cov = coverage.Coverage(source=["."])
self.start_import_stop(cov, "main_file")
cov.lcov_report()
actual_result = self.get_lcov_report_content()
assert expected_result == actual_result
def test_simple_line_coverage_two_files(self):
"""Test that line coverage is created when coverage is run,
and matches the output of the file below."""
self.create_initial_files()
self.assert_doesnt_exist(".coverage")
self.make_file(".coveragerc", "[lcov]\noutput = data.lcov\n")
cov = coverage.Coverage(source=".")
self.start_import_stop(cov, "test_file")
cov.lcov_report()
self.assert_exists("data.lcov")
expected_result = textwrap.dedent("""\
TN:
SF:main_file.py
DA:3,1,7URou3io0zReBkk69lEb/Q
DA:6,1,ilhb4KUfytxtEuClijZPlQ
DA:4,0,Xqj6H1iz/nsARMCAbE90ng
DA:7,0,LWILTcvARcydjFFyo9qM0A
LF:4
LH:2
end_of_record
TN:
SF:test_file.py
DA:3,1,R5Rb4IzmjKRgY/vFFc1TRg
DA:4,1,E/tvV9JPVDhEcTCkgrwOFw
DA:6,1,GP08LPBYJq8EzYveHJy2qA
DA:7,1,MV+jSLi6PFEl+WatEAptog
DA:8,0,qyqd1mF289dg6oQAQHA+gQ
DA:9,0,nmEYd5F1KrxemgC9iVjlqg
DA:10,0,jodMK26WYDizOO1C7ekBbg
DA:11,0,LtxfKehkX8o4KvC5GnN52g
LF:8
LH:4
end_of_record
""")
actual_result = self.get_lcov_report_content(filename="data.lcov")
assert expected_result == actual_result
def test_branch_coverage_one_file(self):
"""Test that the reporter produces valid branch coverage."""
self.make_file("main_file.py", """\
#!/usr/bin/env python3
def is_it_x(x):
if x == 3:
return x
else:
return False
""")
self.assert_doesnt_exist(".coverage")
cov = coverage.Coverage(branch=True, source=".")
self.start_import_stop(cov, "main_file")
cov.lcov_report()
self.assert_exists("coverage.lcov")
expected_result = textwrap.dedent("""\
TN:
SF:main_file.py
DA:3,1,4MDXMbvwQ3L7va1tsphVzw
DA:4,0,MuERA6EYyZNpKPqoJfzwkA
DA:5,0,sAyiiE6iAuPMte9kyd0+3g
DA:7,0,W/g8GJDAYJkSSurt59Mzfw
LF:4
LH:1
BRDA:5,0,0,-
BRDA:7,0,1,-
BRF:2
BRH:0
end_of_record
""")
actual_result = self.get_lcov_report_content()
assert expected_result == actual_result
def test_branch_coverage_two_files(self):
"""Test that valid branch coverage is generated
in the case of two files."""
self.make_file("main_file.py", """\
#!/usr/bin/env python3
def is_it_x(x):
if x == 3:
return x
else:
return False
""")
self.make_file("test_file.py", """\
#!/usr/bin/env python3
from main_file import *
import unittest
class TestIsItX(unittest.TestCase):
def test_is_it_x(self):
self.assertEqual(is_it_x(3), 3)
self.assertEqual(is_it_x(4), False)
""")
self.assert_doesnt_exist(".coverage")
cov = coverage.Coverage(branch=True, source=".")
self.start_import_stop(cov, "test_file")
cov.lcov_report()
self.assert_exists("coverage.lcov")
expected_result = textwrap.dedent("""\
TN:
SF:main_file.py
DA:3,1,4MDXMbvwQ3L7va1tsphVzw
DA:4,0,MuERA6EYyZNpKPqoJfzwkA
DA:5,0,sAyiiE6iAuPMte9kyd0+3g
DA:7,0,W/g8GJDAYJkSSurt59Mzfw
LF:4
LH:1
BRDA:5,0,0,-
BRDA:7,0,1,-
BRF:2
BRH:0
end_of_record
TN:
SF:test_file.py
DA:3,1,9TxKIyoBtmhopmlbDNa8FQ
DA:4,1,E/tvV9JPVDhEcTCkgrwOFw
DA:6,1,C3s/c8C1Yd/zoNG1GnGexg
DA:7,1,9qPyWexYysgeKtB+YvuzAg
DA:8,0,LycuNcdqoUhPXeuXUTf5lA
DA:9,0,FPTWzd68bDx76HN7VHu1wA
LF:6
LH:4
BRF:0
BRH:0
end_of_record
""")
actual_result = self.get_lcov_report_content()
assert actual_result == expected_result
def test_half_covered_branch(self):
"""Test that for a given branch that is only half covered,
the block numbers remain the same, and produces valid lcov.
"""
self.make_file("main_file.py", """\
something = True
if something:
print("Yes, something")
else:
print("No, nothing")
""")
self.assert_doesnt_exist(".coverage")
cov = coverage.Coverage(branch=True, source=".")
self.start_import_stop(cov, "main_file")
cov.lcov_report()
self.assert_exists("coverage.lcov")
expected_result = textwrap.dedent("""\
TN:
SF:main_file.py
DA:1,1,N4kbVOlkNI1rqOfCArBClw
DA:3,1,CmlqqPf0/H+R/p7/PLEXZw
DA:4,1,rE3mWnpoMq2W2sMETVk/uQ
DA:6,0,+Aov7ekIts7C96udNDVIIQ
LF:4
LH:3
BRDA:6,0,0,-
BRDA:4,0,1,1
BRF:2
BRH:1
end_of_record
""")
actual_result = self.get_lcov_report_content()
assert actual_result == expected_result
def test_empty_init_files(self):
"""Test that in the case of an empty __init__.py file, the lcov
reporter will note that the file is there, and will note the empty
line. It will also note the lack of branches, and the checksum for
the line.
Although there are no lines found, it will note one line as hit in
old Pythons, and no lines hit in newer Pythons.
"""
self.make_file("__init__.py", "")
self.assert_doesnt_exist(".coverage")
cov = coverage.Coverage(branch=True, source=".")
self.start_import_stop(cov, "__init__")
cov.lcov_report()
self.assert_exists("coverage.lcov")
# Newer Pythons have truly empty empty files.
if env.PYBEHAVIOR.empty_is_empty:
expected_result = textwrap.dedent("""\
TN:
SF:__init__.py
LF:0
LH:0
BRF:0
BRH:0
end_of_record
""")
else:
expected_result = textwrap.dedent("""\
TN:
SF:__init__.py
DA:1,1,1B2M2Y8AsgTpgAmY7PhCfg
LF:0
LH:1
BRF:0
BRH:0
end_of_record
""")
actual_result = self.get_lcov_report_content()
assert actual_result == expected_result
|
