Add third_party/pexpect

third_party/pexpect/tests/test_destructor.py

Index: third_party/pexpect/tests/test_destructor.py
diff --git a/third_party/pexpect/tests/test_destructor.py b/third_party/pexpect/tests/test_destructor.py
new file mode 100644
index 0000000000000000000000000000000000000000..d27b6f6251ef4d800af3d12cf4b3a7bd56f71bb7
--- /dev/null
+++ b/third_party/pexpect/tests/test_destructor.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+'''
+PEXPECT LICENSE
+
+    This license is approved by the OSI and FSF as GPL-compatible.
+        http://opensource.org/licenses/isc-license.txt
+
+    Copyright (c) 2012, Noah Spurrier <noah@noah.org>
+    PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
+    PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
+    COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+'''
+import pexpect
+import unittest
+from . import PexpectTestCase
+import gc
+import platform
+import time
+
+class TestCaseDestructor(PexpectTestCase.PexpectTestCase):
+    def test_destructor (self):
+        if platform.python_implementation() != 'CPython':
+            # Details of garbage collection are different on other implementations
+            return 'SKIP'
+        gc.collect()
+        time.sleep(3)
+        p1 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p2 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p3 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p4 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        fd_t1 = (p1.child_fd,p2.child_fd,p3.child_fd,p4.child_fd)
+        p1.expect(pexpect.EOF)
+        p2.expect(pexpect.EOF)
+        p3.expect(pexpect.EOF)
+        p4.expect(pexpect.EOF)
+        p1.kill(9)
+        p2.kill(9)
+        p3.kill(9)
+        p4.kill(9)
+        p1 = None
+        p2 = None
+        p3 = None
+        p4 = None
+        gc.collect()
+        time.sleep(3) # Some platforms are slow at gc... Solaris!
+
+        p1 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p2 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p3 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p4 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        fd_t2 = (p1.child_fd,p2.child_fd,p3.child_fd,p4.child_fd)
+        p1.kill(9)
+        p2.kill(9)
+        p3.kill(9)
+        p4.kill(9)
+        del (p1)
+        del (p2)
+        del (p3)
+        del (p4)
+        gc.collect()
+        time.sleep(3)
+
+        p1 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p2 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p3 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        p4 = pexpect.spawn('%s hello_world.py' % self.PYTHONBIN)
+        fd_t3 = (p1.child_fd,p2.child_fd,p3.child_fd,p4.child_fd)
+
+        assert (fd_t1 == fd_t2 == fd_t3), "pty file descriptors not properly garbage collected (fd_t1,fd_t2,fd_t3)=(%s,%s,%s)" % (str(fd_t1),str(fd_t2),str(fd_t3))
+
+
+if __name__ == '__main__':
+    unittest.main()
+
+suite = unittest.makeSuite(TestCaseDestructor,'test')
+