Add test that quit and exit work in debugger.

Closes  #9625

Testing is difficult to do without doctests, and yielding 2 test
functions does not seem to work as the docstring seem to not be found
and the test does reliably pass even when it should not.

IPython/core/tests/test_debugger.py

@@ -1,186 +1,233 b''
 """Tests for debugging machinery.
 """
 from __future__ import print_function
 #-----------------------------------------------------------------------------
 #  Copyright (c) 2012, The IPython Development Team.
 #
 #  Distributed under the terms of the Modified BSD License.
 #
 #  The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import sys
 
 # third-party
 import nose.tools as nt
 
 # Our own
 from IPython.core import debugger
 
 #-----------------------------------------------------------------------------
 # Helper classes, from CPython's Pdb test suite
 #-----------------------------------------------------------------------------
 
 class _FakeInput(object):
     """
     A fake input stream for pdb's interactive debugger.  Whenever a
     line is read, print it (to simulate the user typing it), and then
     return it.  The set of lines to return is specified in the
     constructor; they should not have trailing newlines.
     """
     def __init__(self, lines):
         self.lines = iter(lines)
 
     def readline(self):
         line = next(self.lines)
         print(line)
         return line+'\n'
 
 class PdbTestInput(object):
     """Context manager that makes testing Pdb in doctests easier."""
 
     def __init__(self, input):
         self.input = input
 
     def __enter__(self):
         self.real_stdin = sys.stdin
         sys.stdin = _FakeInput(self.input)
 
     def __exit__(self, *exc):
         sys.stdin = self.real_stdin
 
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
 
 def test_longer_repr():
     try:
         from reprlib import repr as trepr  # Py 3
     except ImportError:
         from repr import repr as trepr  # Py 2
     
     a = '1234567890'* 7
     ar = "'1234567890123456789012345678901234567890123456789012345678901234567890'"
     a_trunc = "'123456789012...8901234567890'"
     nt.assert_equal(trepr(a), a_trunc)
     # The creation of our tracer modifies the repr module's repr function
     # in-place, since that global is used directly by the stdlib's pdb module.
-    t = debugger.Tracer()
+    debugger.Tracer()
     nt.assert_equal(trepr(a), ar)
 
 def test_ipdb_magics():
     '''Test calling some IPython magics from ipdb.
 
     First, set up some test functions and classes which we can inspect.
 
     >>> class ExampleClass(object):
     ...    """Docstring for ExampleClass."""
     ...    def __init__(self):
     ...        """Docstring for ExampleClass.__init__"""
     ...        pass
     ...    def __str__(self):
     ...        return "ExampleClass()"
 
     >>> def example_function(x, y, z="hello"):
     ...     """Docstring for example_function."""
     ...     pass
 
     >>> old_trace = sys.gettrace()
 
     Create a function which triggers ipdb.
 
     >>> def trigger_ipdb():
     ...    a = ExampleClass()
     ...    debugger.Pdb().set_trace()
 
     >>> with PdbTestInput([
     ...    'pdef example_function',
     ...    'pdoc ExampleClass',
     ...    'up',
     ...    'down',
     ...    'list',
     ...    'pinfo a',
     ...    'll',
     ...    'continue',
     ... ]):
     ...     trigger_ipdb()
     --Return--
     None
     > <doctest ...>(3)trigger_ipdb()
           1 def trigger_ipdb():
           2    a = ExampleClass()
     ----> 3    debugger.Pdb().set_trace()
     <BLANKLINE>
     ipdb> pdef example_function
      example_function(x, y, z='hello')
      ipdb> pdoc ExampleClass
     Class docstring:
         Docstring for ExampleClass.
     Init docstring:
         Docstring for ExampleClass.__init__
     ipdb> up
     > <doctest ...>(11)<module>()
           7    'pinfo a',
           8    'll',
           9    'continue',
          10 ]):
     ---> 11     trigger_ipdb()
     <BLANKLINE>
     ipdb> down
     None
     > <doctest ...>(3)trigger_ipdb()
           1 def trigger_ipdb():
           2    a = ExampleClass()
     ----> 3    debugger.Pdb().set_trace()
     <BLANKLINE>
     ipdb> list
           1 def trigger_ipdb():
           2    a = ExampleClass()
     ----> 3    debugger.Pdb().set_trace()
     <BLANKLINE>
     ipdb> pinfo a
     Type:           ExampleClass
     String form:    ExampleClass()
     Namespace:      Local...
     Docstring:      Docstring for ExampleClass.
     Init docstring: Docstring for ExampleClass.__init__
     ipdb> ll
           1 def trigger_ipdb():
           2    a = ExampleClass()
     ----> 3    debugger.Pdb().set_trace()
     <BLANKLINE>
     ipdb> continue
     
     Restore previous trace function, e.g. for coverage.py    
     
     >>> sys.settrace(old_trace)
     '''
 
 def test_ipdb_magics2():
     '''Test ipdb with a very short function.
     
     >>> old_trace = sys.gettrace()
 
     >>> def bar():
     ...     pass
 
     Run ipdb.
 
     >>> with PdbTestInput([
     ...    'continue',
     ... ]):
     ...     debugger.Pdb().runcall(bar)
     > <doctest ...>(2)bar()
           1 def bar():
     ----> 2    pass
     <BLANKLINE>
     ipdb> continue
     
     Restore previous trace function, e.g. for coverage.py    
     
     >>> sys.settrace(old_trace)
     '''
+
+def can_quit():
+    '''Test that quit work in ipydb
+
+    >>> old_trace = sys.gettrace()
+
+    >>> def bar():
+    ...     pass
+
+    >>> with PdbTestInput([
+    ...    'quit',
+    ... ]):
+    ...     debugger.Pdb().runcall(bar)
+    > <doctest ...>(2)bar()
+            1 def bar():
+    ----> 2    pass
+    <BLANKLINE>
+    ipdb> quit
+
+    Restore previous trace function, e.g. for coverage.py
+
+    >>> sys.settrace(old_trace)
+    '''
+
+
+def can_exit():
+    '''Test that quit work in ipydb
+
+    >>> old_trace = sys.gettrace()
+
+    >>> def bar():
+    ...     pass
+
+    >>> with PdbTestInput([
+    ...    'exit',
+    ... ]):
+    ...     debugger.Pdb().runcall(bar)
+    > <doctest ...>(2)bar()
+            1 def bar():
+    ----> 2    pass
+    <BLANKLINE>
+    ipdb> exit
+
+    Restore previous trace function, e.g. for coverage.py
+
+    >>> sys.settrace(old_trace)
+    '''