Hi All,

I have this simple function:

def execute(command):
    process = Popen(command.split(),stderr=STDOUT,stdout=PIPE)
    return process.communicate()[0]

..but my unit test for it fails:

from testfixtures import tempdir,compare
from unittest import TestCase

class TestExecute(TestCase):

    @tempdir()
    def test_out_and_err(self,d):
        path = d.write('test.py','\n'.join((
                "import sys",
                "sys.stdout.write('stdout\\n')",
                "sys.stderr.write('stderr\\n')",
                "sys.stdout.write('stdout2\\n')",
                )),path=True)
        compare('stdout\nstderr\nstdout2\n',
                execute(sys.executable+' '+path))

...because:

AssertionError:
@@ -1,4 +1,4 @@
-stdout
-stderr
-stdout2
+stdout
+stdout2
+stderr

...the order of the writes isn't preserved.
How can I get this to be the case?

Chris

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