import sys
from subprocess import call
from unittest import TestCase
from testfixtures import OutputCapture, compare
from .test_compare import CompareHelper
class TestOutputCapture(CompareHelper, TestCase):
def test_compare_strips(self):
with OutputCapture() as o:
print(' Bar! ')
o.compare('Bar!')
def test_compare_doesnt_strip(self):
with OutputCapture(strip_whitespace=False) as o:
print(' Bar! ')
self.check_raises(
'\tBar!',
compare=o.compare,
message="'\\tBar!' (expected) != ' Bar! \\n' (actual)",
)
def test_stdout_and_stderr(self):
with OutputCapture() as o:
print('hello', file=sys.stdout)
print('out', file=sys.stderr)
print('there', file=sys.stdout)
print('now', file=sys.stderr)
o.compare("hello\nout\nthere\nnow\n")
def test_unicode(self):
with OutputCapture() as o:
print(u'\u65e5', file=sys.stdout)
o.compare(u'\u65e5\n')
def test_separate_capture(self):
with OutputCapture(separate=True) as o:
print('hello', file=sys.stdout)
print('out', file=sys.stderr)
print('there', file=sys.stdout)
print('now', file=sys.stderr)
o.compare(stdout="hello\nthere\n",
stderr="out\nnow\n")
def test_compare_both_at_once(self):
with OutputCapture(separate=True) as o:
print('hello', file=sys.stdout)
print('out', file=sys.stderr)
self.check_raises(
stdout="out\n",
stderr="hello\n",
compare=o.compare,
message=(
'dict not as expected:\n'
'\n'
'values differ:\n'
"'stderr': 'hello' (expected) != 'out' (actual)\n"
"'stdout': 'out' (expected) != 'hello' (actual)\n"
'\n'
"While comparing ['stderr']: 'hello' (expected) != 'out' (actual)\n"
'\n'
"While comparing ['stdout']: 'out' (expected) != 'hello' (actual)"
),
)
def test_original_restore(self):
o_out, o_err = sys.stdout, sys.stderr
with OutputCapture() as o:
self.assertFalse(sys.stdout is o_out)
self.assertFalse(sys.stderr is o_err)
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
def test_double_disable(self):
o_out, o_err = sys.stdout, sys.stderr
with OutputCapture() as o:
self.assertFalse(sys.stdout is o_out)
self.assertFalse(sys.stderr is o_err)
o.disable()
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
o.disable()
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
def test_double_enable(self):
o_out, o_err = sys.stdout, sys.stderr
with OutputCapture() as o:
o.disable()
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
o.enable()
self.assertFalse(sys.stdout is o_out)
self.assertFalse(sys.stderr is o_err)
o.enable()
self.assertFalse(sys.stdout is o_out)
self.assertFalse(sys.stderr is o_err)
self.assertTrue(sys.stdout is o_out)
self.assertTrue(sys.stderr is o_err)
class TestOutputCaptureWithDescriptors(object):
def test_fd(self, capfd):
with capfd.disabled(), OutputCapture(fd=True) as o:
call([sys.executable, '-c', "import sys; sys.stdout.write('out')"])
call([sys.executable, '-c', "import sys; sys.stderr.write('err')"])
compare(o.captured, expected='outerr')
o.compare(expected='outerr')
def test_fd_separate(self, capfd):
with capfd.disabled(), OutputCapture(fd=True, separate=True) as o:
call([sys.executable, '-c', "import sys; sys.stdout.write('out')"])
call([sys.executable, '-c', "import sys; sys.stderr.write('err')"])
compare(o.captured, expected='')
o.compare(stdout='out', stderr='err')
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