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Test Info:

from __future__ import absolute_import
import subprocess
import sys
import unittest
import mozunit
from mozprocess.processhandler import ProcessReader, StoreOutput
def run_python(str_code, stdout=subprocess.PIPE, stderr=subprocess.PIPE):
cmd = [sys.executable, "-c", str_code]
return subprocess.Popen(cmd, stdout=stdout, stderr=stderr)
class TestProcessReader(unittest.TestCase):
def setUp(self):
self.out = StoreOutput()
self.err = StoreOutput()
self.finished = False
def on_finished():
self.finished = True
self.timeout = False
def on_timeout():
self.timeout = True
self.reader = ProcessReader(
stdout_callback=self.out,
stderr_callback=self.err,
finished_callback=on_finished,
timeout_callback=on_timeout,
)
def test_stdout_callback(self):
proc = run_python("print(1); print(2)")
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual([x.decode("utf8") for x in self.out.output], ["1", "2"])
self.assertEqual(self.err.output, [])
def test_stderr_callback(self):
proc = run_python('import sys; sys.stderr.write("hello world\\n")')
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual(self.out.output, [])
self.assertEqual([x.decode("utf8") for x in self.err.output], ["hello world"])
def test_stdout_and_stderr_callbacks(self):
proc = run_python(
'import sys; sys.stderr.write("hello world\\n"); print(1); print(2)'
)
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual([x.decode("utf8") for x in self.out.output], ["1", "2"])
self.assertEqual([x.decode("utf8") for x in self.err.output], ["hello world"])
def test_finished_callback(self):
self.assertFalse(self.finished)
proc = run_python("")
self.reader.start(proc)
self.reader.thread.join()
self.assertTrue(self.finished)
def test_timeout(self):
self.reader.timeout = 0.05
self.assertFalse(self.timeout)
proc = run_python("import time; time.sleep(0.1)")
self.reader.start(proc)
self.reader.thread.join()
self.assertTrue(self.timeout)
self.assertFalse(self.finished)
def test_output_timeout(self):
self.reader.output_timeout = 0.05
self.assertFalse(self.timeout)
proc = run_python("import time; time.sleep(0.1)")
self.reader.start(proc)
self.reader.thread.join()
self.assertTrue(self.timeout)
self.assertFalse(self.finished)
def test_read_without_eol(self):
proc = run_python('import sys; sys.stdout.write("1")')
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual([x.decode("utf8") for x in self.out.output], ["1"])
def test_read_with_strange_eol(self):
proc = run_python('import sys; sys.stdout.write("1\\r\\r\\r\\n")')
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual([x.decode("utf8") for x in self.out.output], ["1"])
def test_mixed_stdout_stderr(self):
proc = run_python(
'import sys; sys.stderr.write("hello world\\n"); print(1); print(2)',
stderr=subprocess.STDOUT,
)
self.reader.start(proc)
self.reader.thread.join()
self.assertEqual(
sorted([x.decode("utf8") for x in self.out.output]),
sorted(["1", "2", "hello world"]),
)
self.assertEqual(self.err.output, [])
if __name__ == "__main__":
mozunit.main()