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test_pytest_cov.py
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test_pytest_cov.py
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"""Tests for pytest-cov.
Known issues:
- If py 2 then can have tx for any py 2, but problems if tx for py 3.
- If py 3.0 then can have tx for py 3.0 / 3.1, but problems if tx for py 2.
- If py 3.1 then can have tx for py 3.1, but problems if tx for py 2 or py 3.0.
- For py 3.0 coverage seems to give incorrect results, it reports all
covered except the one line which it should have actually covered.
Issue reported upstream, also only problem with pass statement and
is fine with simple assignment statement.
"""
import py
import os
import sys
pytest_plugins = 'pytester', 'cov'
SCRIPT = '''
import sys
def pytest_generate_tests(metafunc):
for i in range(10):
metafunc.addcall()
def test_foo():
version = sys.version_info[:2]
if version == (2, 4):
a = True
if version == (2, 5):
a = True
if version == (2, 6):
a = True
if version == (2, 7):
a = True
if version == (3, 0):
a = True
if version == (3, 1):
a = True
if version == (3, 2):
a = True
'''
SCRIPT_CHILD = '''
import sys
idx = int(sys.argv[1])
if idx == 0:
pass
if idx == 1:
pass
'''
SCRIPT_PARENT = '''
import subprocess
import sys
def pytest_generate_tests(metafunc):
for i in range(2):
metafunc.addcall(funcargs=dict(idx=i))
def test_foo(idx):
out, err = subprocess.Popen([sys.executable, 'child_script.py', str(idx)], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
'''
SCRIPT_FUNCARG = '''
import coverage
def test_foo(cov):
assert isinstance(cov, coverage.control.coverage)
'''
SCRIPT_FUNCARG_NOT_ACTIVE = '''
def test_foo(cov):
assert cov is None
'''
MULTIPROCESSING_SCRIPT = '''
import multiprocessing
def target_fn():
a = True
return a
def test_run_target():
p = multiprocessing.Process(target=target_fn)
p.start()
p.join()
'''
def test_central(testdir):
script = testdir.makepyfile(SCRIPT)
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'test_central * 20 * 70%*',
'*10 passed*'
])
assert result.ret == 0
def test_dist_collocated(testdir):
script = testdir.makepyfile(SCRIPT)
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
'--dist=load',
'--tx=2*popen',
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'test_dist_collocated * 20 * 70%*',
'*10 passed*'
])
assert result.ret == 0
def test_dist_not_collocated(testdir):
script = testdir.makepyfile(SCRIPT)
dir1 = testdir.mkdir('dir1')
dir2 = testdir.mkdir('dir2')
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
'--dist=load',
'--tx=popen//chdir=%s' % dir1,
'--tx=popen//chdir=%s' % dir2,
'--rsyncdir=%s' % script.basename,
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'test_dist_not_collocated * 20 * 70%*',
'*10 passed*'
])
assert result.ret == 0
def test_central_subprocess(testdir):
scripts = testdir.makepyfile(parent_script=SCRIPT_PARENT, child_script=SCRIPT_CHILD)
parent_script = scripts.dirpath().join('parent_script.py')
result = testdir.runpytest('-v',
'--cov=%s' % scripts.dirpath(),
'--cov-report=term-missing',
parent_script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'child_script * 6 * 100%*',
'parent_script * 7 * 100%*',
])
assert result.ret == 0
def test_dist_subprocess_collocated(testdir):
scripts = testdir.makepyfile(parent_script=SCRIPT_PARENT, child_script=SCRIPT_CHILD)
parent_script = scripts.dirpath().join('parent_script.py')
result = testdir.runpytest('-v',
'--cov=%s' % scripts.dirpath(),
'--cov-report=term-missing',
'--dist=load',
'--tx=2*popen',
parent_script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'child_script * 6 * 100%*',
'parent_script * 7 * 100%*',
])
assert result.ret == 0
def test_dist_subprocess_not_collocated(testdir, tmpdir):
scripts = testdir.makepyfile(parent_script=SCRIPT_PARENT, child_script=SCRIPT_CHILD)
parent_script = scripts.dirpath().join('parent_script.py')
child_script = scripts.dirpath().join('child_script.py')
dir1 = tmpdir.mkdir('dir1')
dir2 = tmpdir.mkdir('dir2')
result = testdir.runpytest('-v',
'--cov=%s' % scripts.dirpath(),
'--cov-report=term-missing',
'--dist=load',
'--tx=popen//chdir=%s' % dir1,
'--tx=popen//chdir=%s' % dir2,
'--rsyncdir=%s' % child_script,
'--rsyncdir=%s' % parent_script,
parent_script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'child_script * 6 * 100%*',
'parent_script * 7 * 100%*',
])
assert result.ret == 0
def test_empty_report(testdir):
script = testdir.makepyfile(SCRIPT)
result = testdir.runpytest('-v',
'--cov=non_existent_module',
'--cov-report=term-missing',
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'*10 passed*'
])
assert result.ret == 0
matching_lines = [line for line in result.outlines if '%' in line]
assert not matching_lines
def test_dist_missing_data(testdir):
version = sys.version_info[:2]
if version == (2, 4):
exe = '/usr/local/py24/bin/python'
if version == (2, 5):
exe = '/usr/local/py25/bin/python'
if version == (2, 6):
exe = '/usr/local/py26/bin/python'
if version == (2, 7):
exe = '/usr/local/py27/bin/python'
if version == (3, 0):
exe = '/usr/local/py30/bin/python3.0'
if version == (3, 1):
exe = '/usr/local/py31/bin/python3.1'
if version == (3, 2):
exe = '/usr/local/py32/bin/python3.2'
script = testdir.makepyfile(SCRIPT)
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
'--dist=load',
'--tx=popen//python=%s' % exe,
script)
result.stdout.fnmatch_lines([
'*- coverage: failed slaves -*'
])
assert result.ret == 0
def test_funcarg(testdir):
script = testdir.makepyfile(SCRIPT_FUNCARG)
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'test_funcarg * 3 * 100%*',
'*1 passed*'
])
assert result.ret == 0
def test_funcarg_not_active(testdir):
script = testdir.makepyfile(SCRIPT_FUNCARG_NOT_ACTIVE)
result = testdir.runpytest('-v',
script)
result.stdout.fnmatch_lines([
'*1 passed*'
])
assert result.ret == 0
def test_multiprocessing_subprocess(testdir):
py.test.importorskip('multiprocessing.util')
script = testdir.makepyfile(MULTIPROCESSING_SCRIPT)
result = testdir.runpytest('-v',
'--cov=%s' % script.dirpath(),
'--cov-report=term-missing',
script)
result.stdout.fnmatch_lines([
'*- coverage: platform *, python * -*',
'test_multiprocessing_subprocess * 8 * 100%*',
'*1 passed*'
])
assert result.ret == 0