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"""Tests for process behavior of coverage.py."""
import os, sys, textwrap
import coverage
sys.path.insert(0, os.path.split(__file__)[0]) # Force relative import for Py3k
from coveragetest import CoverageTest
class ProcessTest(CoverageTest):
"""Tests of the per-process behavior of coverage.py."""
def number_of_data_files(self):
"""Return the number of coverage data files in this directory."""
num = 0
for f in os.listdir('.'):
if f.startswith('.coverage.') or f == '.coverage':
num += 1
return num
def test_save_on_exit(self):
self.make_file("mycode.py", """\
h = "Hello"
w = "world"
""")
self.assert_doesnt_exist(".coverage")
self.run_command("coverage -x mycode.py")
self.assert_exists(".coverage")
def test_environment(self):
# Checks that we can import modules from the test directory at all!
self.make_file("mycode.py", """\
import covmod1
import covmodzip1
a = 1
print ('done')
""")
self.assert_doesnt_exist(".coverage")
out = self.run_command("coverage -x mycode.py")
self.assert_exists(".coverage")
self.assertEqual(out, 'done\n')
def test_combine_parallel_data(self):
self.make_file("b_or_c.py", """\
import sys
a = 1
if sys.argv[1] == 'b':
b = 1
else:
c = 1
d = 1
print ('done')
""")
out = self.run_command("coverage -x -p b_or_c.py b")
self.assertEqual(out, 'done\n')
self.assert_doesnt_exist(".coverage")
out = self.run_command("coverage -x -p b_or_c.py c")
self.assertEqual(out, 'done\n')
self.assert_doesnt_exist(".coverage")
# After two -p runs, there should be two .coverage.machine.123 files.
self.assertEqual(self.number_of_data_files(), 2)
# Combine the parallel coverage data files into .coverage .
self.run_command("coverage -c")
self.assert_exists(".coverage")
# After combining, there should be only the .coverage file.
self.assertEqual(self.number_of_data_files(), 1)
# Read the coverage file and see that b_or_c.py has all 7 lines
# executed.
data = coverage.CoverageData()
data.read_file(".coverage")
self.assertEqual(data.summary()['b_or_c.py'], 7)
def test_combine_with_rc(self):
self.make_file("b_or_c.py", """\
import sys
a = 1
if sys.argv[1] == 'b':
b = 1
else:
c = 1
d = 1
print ('done')
""")
self.make_file(".coveragerc", """\
[run]
parallel = true
""")
out = self.run_command("coverage run b_or_c.py b")
self.assertEqual(out, 'done\n')
self.assert_doesnt_exist(".coverage")
out = self.run_command("coverage run b_or_c.py c")
self.assertEqual(out, 'done\n')
self.assert_doesnt_exist(".coverage")
# After two runs, there should be two .coverage.machine.123 files.
self.assertEqual(self.number_of_data_files(), 2)
# Combine the parallel coverage data files into .coverage .
self.run_command("coverage combine")
self.assert_exists(".coverage")
self.assert_exists(".coveragerc")
# After combining, there should be only the .coverage file.
self.assertEqual(self.number_of_data_files(), 1)
# Read the coverage file and see that b_or_c.py has all 7 lines
# executed.
data = coverage.CoverageData()
data.read_file(".coverage")
self.assertEqual(data.summary()['b_or_c.py'], 7)
# Reporting should still work even with the .rc file
out = self.run_command("coverage report")
self.assertMultiLineEqual(out, textwrap.dedent("""\
Name Stmts Miss Cover
----------------------------
b_or_c 7 0 100%
"""))
def test_missing_source_file(self):
# Check what happens if the source is missing when reporting happens.
self.make_file("fleeting.py", """\
s = 'goodbye, cruel world!'
""")
self.run_command("coverage run fleeting.py")
os.remove("fleeting.py")
out = self.run_command("coverage html -d htmlcov")
self.assertRegexpMatches(out, "No source for code: '.*fleeting.py'")
self.assertFalse("Traceback" in out)
# It happens that the code paths are different for *.py and other
# files, so try again with no extension.
self.make_file("fleeting", """\
s = 'goodbye, cruel world!'
""")
self.run_command("coverage run fleeting")
os.remove("fleeting")
status, out = self.run_command_status("coverage html -d htmlcov", 1)
self.assertRegexpMatches(out, "No source for code: '.*fleeting'")
self.assertFalse("Traceback" in out)
self.assertEqual(status, 1)
def test_running_missing_file(self):
status, out = self.run_command_status("coverage run xyzzy.py", 1)
self.assertRegexpMatches(out, "No file to run: .*xyzzy.py")
self.assertFalse("Traceback" in out)
self.assertEqual(status, 1)
def test_code_throws(self):
self.make_file("throw.py", """\
def f1():
raise Exception("hey!")
def f2():
f1()
f2()
""")
# The important thing is for "coverage run" and "python" to report the
# same traceback.
status, out = self.run_command_status("coverage run throw.py", 1)
out2 = self.run_command("python throw.py")
self.assertMultiLineEqual(out, out2)
# But also make sure that the output is what we expect.
self.assertTrue('File "throw.py", line 5, in f2' in out)
self.assertTrue('raise Exception("hey!")' in out)
self.assertFalse('coverage' in out)
self.assertEqual(status, 1)
def test_code_exits(self):
self.make_file("exit.py", """\
import sys
def f1():
print("about to exit..")
sys.exit(17)
def f2():
f1()
f2()
""")
# The important thing is for "coverage run" and "python" to have the
# same output. No traceback.
status, out = self.run_command_status("coverage run exit.py", 17)
status2, out2 = self.run_command_status("python exit.py", 17)
self.assertMultiLineEqual(out, out2)
self.assertMultiLineEqual(out, "about to exit..\n")
self.assertEqual(status, status2)
self.assertEqual(status, 17)
def test_code_exits_no_arg(self):
self.make_file("exit_none.py", """\
import sys
def f1():
print("about to exit quietly..")
sys.exit()
f1()
""")
status, out = self.run_command_status("coverage run exit_none.py", 0)
status2, out2 = self.run_command_status("python exit_none.py", 0)
self.assertMultiLineEqual(out, out2)
self.assertMultiLineEqual(out, "about to exit quietly..\n")
self.assertEqual(status, status2)
self.assertEqual(status, 0)
if hasattr(os, 'fork'):
def test_fork(self):
self.make_file("fork.py", """\
import os
def child():
print('Child!')
def main():
ret = os.fork()
if ret == 0:
child()
else:
os.waitpid(ret, 0)
main()
""")
out = self.run_command("coverage run -p fork.py")
self.assertEqual(out, 'Child!\n')
self.assert_doesnt_exist(".coverage")
# After running the forking program, there should be two
# .coverage.machine.123 files.
self.assertEqual(self.number_of_data_files(), 2)
# Combine the parallel coverage data files into .coverage .
self.run_command("coverage -c")
self.assert_exists(".coverage")
# After combining, there should be only the .coverage file.
self.assertEqual(self.number_of_data_files(), 1)
# Read the coverage file and see that b_or_c.py has all 7 lines
# executed.
data = coverage.CoverageData()
data.read_file(".coverage")
self.assertEqual(data.summary()['fork.py'], 9)
def test_warnings(self):
self.make_file("hello.py", """\
import sys, os
print("Hello")
""")
out = self.run_command("coverage run --source=sys,xyzzy,quux hello.py")
self.assertTrue("Hello\n" in out)
self.assertTrue(textwrap.dedent("""\
Coverage.py warning: Module sys has no python source.
Coverage.py warning: Module xyzzy was never imported.
Coverage.py warning: Module quux was never imported.
Coverage.py warning: No data was collected.
""") in out)
def test_warnings_if_never_run(self):
out = self.run_command("coverage run i_dont_exist.py")
self.assertTrue("No file to run: 'i_dont_exist.py'" in out)
self.assertTrue("warning" not in out)
out = self.run_command("coverage run -m no_such_module")
self.assertTrue("No module named no_such_module" in out)
self.assertTrue("warning" not in out)
|
