def sh(cmd, fd={}, e={}, cd=None):
"""
Perform a fork-exec-wait of a Sh command and return its stdout
as a byte string.
"""
f = Sh(cmd, fd=fd, e=e, cd=cd).capture(1).stdout
try:
s = f.read()
finally:
f.close()
return s
def test_capture(self):
sh_call = Sh('echo bar >&2; echo foo; exit 1')
out, err, status = sh_call.capture(1, 2)
self.assertEquals(status, 1)
# these tests pass on OS X, not sure how they will run on
# linux
self.assertSh(out.read(), 'foo')
self.assertSh(err.read(), 'bar')
### test Pipe impossible capture
self.assertRaises(
ValueError,
lambda:pipe(Sh("echo bogus"), Cmd("cat", {1: os.devnull})))
### test Cmd impossible capture
self.assertRaises(
ValueError,
lambda: sh("echo bogus stuff", {1: os.devnull}))
### test Pipe stderr capture
pipe_ = Pipe(Sh('echo foo; sleep 0.01; echo bar >&2'), Sh('cat >&2'))
self.assertSh(pipe_.capture(2).stderr.read(), 'foobar')