Allow {p}.interact(escape_character=None)allow-disable-escape-interact

For those who wish to disable the ability to escape using process
(likely, human) input until normal process termination, they may
now set the value of escape_character to None.

Some of the related docstring on escape_character was made more
brief and clear about its behaviour.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/test_interact.py b/tests/test_interact.py
index e635cb0..21d083b 100755
--- a/tests/test_interact.py
+++ b/tests/test_interact.py
@@ -57,6 +57,18 @@ class InteractTestCase (PexpectTestCase.PexpectTestCase):
         assert not p.isalive()
         assert p.exitstatus == 0
 
+    def test_interact_escape_None(self):
+        " Return only after Termination when `escape_character=None'. "
+        p = pexpect.spawn('{self.interact_py} --no-escape'.format(self=self),
+                          timeout=5, env=self.env)
+        p.expect('<in >')
+        p.sendcontrol('d')
+        p.expect('<eof>')
+        p.expect_exact('Escaped interact')
+        p.expect(pexpect.EOF)
+        assert not p.isalive()
+        assert p.exitstatus == 0
+
     def test_interact_spawn_eof(self):
         " Ensure subprocess receives EOF and exit. "
         p = pexpect.spawn(self.interact_py, timeout=5, env=self.env)