tests: import tty_create_child_test.py.

tests/tty_create_child_test.py

@@ -0,0 +1,34 @@
+
+import os
+import tempfile
+import time
+import unittest2
+
+import mitogen.parent
+
+
+class TtyCreateChildTest(unittest2.TestCase):
+    func = staticmethod(mitogen.parent.tty_create_child)
+
+    def test_dev_tty_open_succeeds(self):
+        import logging
+        logging.basicConfig(level=logging.DEBUG)
+        tf = tempfile.NamedTemporaryFile()
+        try:
+            pid, fd = self.func(
+                'bash', '-c', 'exec 2>%s; echo hi > /dev/tty' % (tf.name,)
+            )
+            # TODO: this waitpid hangs on OS X. Installing a SIGCHLD handler
+            # reveals the parent /is/ notified of the child's death, but
+            # calling waitpid() from within SIGCHLD yields "No such processes".
+            # Meanwhile, even inserting a sleep, the following call will hang.
+            waited_pid, status = os.waitpid(pid, 0)
+            self.assertEquals(pid, waited_pid)
+            self.assertEquals(0, status)
+            self.assertEquals('', tf.read())
+        finally:
+            tf.close()
+
+
+if __name__ == '__main__':
+    unittest2.main()