mirror of
https://github.com/python/cpython
synced 2024-10-14 10:33:27 +00:00
gh-79871: IDLE - Fix and test debugger module (#11451)
Add docstrings to the debugger module. Fix two bugs: initialize Idb.botframe (should be in Bdb); In Idb.in_rpc_code, check whether prev_frame is None before trying to use it. Make other code changes. Expand test_debugger coverage from 19% to 66%. --------- Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
This commit is contained in:
parent
18c6929469
commit
adedcfa06b
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@ -1,3 +1,20 @@
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"""Debug user code with a GUI interface to a subclass of bdb.Bdb.
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The Idb idb and Debugger gui instances each need a reference to each
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other or to an rpc proxy for each other.
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If IDLE is started with '-n', so that user code and idb both run in the
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IDLE process, Debugger is called without an idb. Debugger.__init__
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calls Idb with its incomplete self. Idb.__init__ stores gui and gui
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then stores idb.
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If IDLE is started normally, so that user code executes in a separate
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process, debugger_r.start_remote_debugger is called, executing in the
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IDLE process. It calls 'start the debugger' in the remote process,
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which calls Idb with a gui proxy. Then Debugger is called in the IDLE
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for more.
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"""
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import bdb
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import os
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@ -10,41 +27,51 @@
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class Idb(bdb.Bdb):
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"Supply user_line and user_exception functions for Bdb."
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def __init__(self, gui):
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self.gui = gui # An instance of Debugger or proxy of remote.
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bdb.Bdb.__init__(self)
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self.gui = gui # An instance of Debugger or proxy thereof.
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super().__init__()
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def user_line(self, frame):
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if self.in_rpc_code(frame):
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"""Handle a user stopping or breaking at a line.
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Convert frame to a string and send it to gui.
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"""
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if _in_rpc_code(frame):
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self.set_step()
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return
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message = self.__frame2message(frame)
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message = _frame2message(frame)
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try:
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self.gui.interaction(message, frame)
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except TclError: # When closing debugger window with [x] in 3.x
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pass
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def user_exception(self, frame, info):
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if self.in_rpc_code(frame):
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def user_exception(self, frame, exc_info):
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"""Handle an the occurrence of an exception."""
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if _in_rpc_code(frame):
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self.set_step()
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return
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message = self.__frame2message(frame)
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self.gui.interaction(message, frame, info)
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message = _frame2message(frame)
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self.gui.interaction(message, frame, exc_info)
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def in_rpc_code(self, frame):
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def _in_rpc_code(frame):
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"Determine if debugger is within RPC code."
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if frame.f_code.co_filename.count('rpc.py'):
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return True
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return True # Skip this frame.
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else:
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prev_frame = frame.f_back
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if prev_frame is None:
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return False
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prev_name = prev_frame.f_code.co_filename
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if 'idlelib' in prev_name and 'debugger' in prev_name:
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# catch both idlelib/debugger.py and idlelib/debugger_r.py
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# on both Posix and Windows
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return False
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return self.in_rpc_code(prev_frame)
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return _in_rpc_code(prev_frame)
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def __frame2message(self, frame):
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def _frame2message(frame):
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"""Return a message string for frame."""
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code = frame.f_code
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filename = code.co_filename
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lineno = frame.f_lineno
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@ -56,20 +83,39 @@ def __frame2message(self, frame):
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class Debugger:
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"""The debugger interface.
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vstack = vsource = vlocals = vglobals = None
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This class handles the drawing of the debugger window and
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the interactions with the underlying debugger session.
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"""
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vstack = None
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vsource = None
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vlocals = None
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vglobals = None
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stackviewer = None
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localsviewer = None
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globalsviewer = None
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def __init__(self, pyshell, idb=None):
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"""Instantiate and draw a debugger window.
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:param pyshell: An instance of the PyShell Window
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:type pyshell: :class:`idlelib.pyshell.PyShell`
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:param idb: An instance of the IDLE debugger (optional)
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:type idb: :class:`idlelib.debugger.Idb`
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"""
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if idb is None:
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idb = Idb(self)
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self.pyshell = pyshell
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self.idb = idb # If passed, a proxy of remote instance.
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self.frame = None
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self.make_gui()
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self.interacting = 0
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self.interacting = False
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self.nesting_level = 0
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def run(self, *args):
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"""Run the debugger."""
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# Deal with the scenario where we've already got a program running
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# in the debugger and we want to start another. If that is the case,
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# our second 'run' was invoked from an event dispatched not from
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self.root.after(100, lambda: self.run(*args))
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return
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try:
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self.interacting = 1
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self.interacting = True
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return self.idb.run(*args)
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finally:
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self.interacting = 0
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self.interacting = False
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def close(self, event=None):
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"""Close the debugger and window."""
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try:
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self.quit()
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except Exception:
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@ -127,6 +174,7 @@ def close(self, event=None):
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self.top.destroy()
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def make_gui(self):
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"""Draw the debugger gui on the screen."""
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pyshell = self.pyshell
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self.flist = pyshell.flist
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self.root = root = pyshell.root
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@ -135,11 +183,11 @@ def make_gui(self):
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self.top.wm_iconname("Debug")
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top.wm_protocol("WM_DELETE_WINDOW", self.close)
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self.top.bind("<Escape>", self.close)
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#
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self.bframe = bframe = Frame(top)
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self.bframe.pack(anchor="w")
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self.buttons = bl = []
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#
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self.bcont = b = Button(bframe, text="Go", command=self.cont)
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bl.append(b)
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self.bstep = b = Button(bframe, text="Step", command=self.step)
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bl.append(b)
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self.bret = b = Button(bframe, text="Quit", command=self.quit)
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bl.append(b)
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#
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for b in bl:
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b.configure(state="disabled")
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b.pack(side="left")
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#
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self.cframe = cframe = Frame(bframe)
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self.cframe.pack(side="left")
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#
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if not self.vstack:
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self.__class__.vstack = BooleanVar(top)
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self.vstack.set(1)
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self.bglobals = Checkbutton(cframe,
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text="Globals", command=self.show_globals, variable=self.vglobals)
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self.bglobals.grid(row=1, column=1)
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#
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self.status = Label(top, anchor="w")
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self.status.pack(anchor="w")
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self.error = Label(top, anchor="w")
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self.error.pack(anchor="w", fill="x")
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self.errorbg = self.error.cget("background")
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#
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self.fstack = Frame(top, height=1)
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self.fstack.pack(expand=1, fill="both")
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self.flocals = Frame(top)
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self.flocals.pack(expand=1, fill="both")
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self.fglobals = Frame(top, height=1)
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self.fglobals.pack(expand=1, fill="both")
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#
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if self.vstack.get():
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self.show_stack()
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if self.vlocals.get():
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def interaction(self, message, frame, info=None):
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self.frame = frame
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self.status.configure(text=message)
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#
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if info:
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type, value, tb = info
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try:
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tb = None
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bg = self.errorbg
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self.error.configure(text=m1, background=bg)
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#
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sv = self.stackviewer
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if sv:
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stack, i = self.idb.get_stack(self.frame, tb)
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sv.load_stack(stack, i)
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#
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self.show_variables(1)
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#
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if self.vsource.get():
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self.sync_source_line()
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#
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for b in self.buttons:
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b.configure(state="normal")
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#
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self.top.wakeup()
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# Nested main loop: Tkinter's main loop is not reentrant, so use
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# Tcl's vwait facility, which reenters the event loop until an
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# event handler sets the variable we're waiting on
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# event handler sets the variable we're waiting on.
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self.nesting_level += 1
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self.root.tk.call('vwait', '::idledebugwait')
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self.nesting_level -= 1
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#
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for b in self.buttons:
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b.configure(state="disabled")
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self.status.configure(text="")
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def abort_loop(self):
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self.root.tk.call('set', '::idledebugwait', '1')
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stackviewer = None
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def show_stack(self):
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if not self.stackviewer and self.vstack.get():
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self.stackviewer = sv = StackViewer(self.fstack, self.flist, self)
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self.frame = stackitem[0] # lineno is stackitem[1]
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self.show_variables()
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localsviewer = None
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globalsviewer = None
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def show_locals(self):
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lv = self.localsviewer
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if self.vlocals.get():
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if gv:
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gv.load_dict(gdict, force, self.pyshell.interp.rpcclt)
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def set_breakpoint_here(self, filename, lineno):
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def set_breakpoint(self, filename, lineno):
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"""Set a filename-lineno breakpoint in the debugger.
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Called from self.load_breakpoints and EW.setbreakpoint
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"""
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self.idb.set_break(filename, lineno)
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def clear_breakpoint_here(self, filename, lineno):
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def clear_breakpoint(self, filename, lineno):
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self.idb.clear_break(filename, lineno)
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def clear_file_breaks(self, filename):
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self.idb.clear_all_file_breaks(filename)
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def load_breakpoints(self):
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"Load PyShellEditorWindow breakpoints into subprocess debugger"
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"""Load PyShellEditorWindow breakpoints into subprocess debugger."""
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for editwin in self.pyshell.flist.inversedict:
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filename = editwin.io.filename
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try:
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for lineno in editwin.breakpoints:
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self.set_breakpoint_here(filename, lineno)
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self.set_breakpoint(filename, lineno)
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except AttributeError:
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continue
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class StackViewer(ScrolledList):
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"Code stack viewer for debugger GUI."
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def __init__(self, master, flist, gui):
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if macosx.isAquaTk():
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self.select(index)
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def popup_event(self, event):
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"override base method"
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"Override base method."
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if self.stack:
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return ScrolledList.popup_event(self, event)
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def fill_menu(self):
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"override base method"
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"Override base method."
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menu = self.menu
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menu.add_command(label="Go to source line",
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command=self.goto_source_line)
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command=self.show_stack_frame)
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def on_select(self, index):
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"override base method"
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"Override base method."
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if 0 <= index < len(self.stack):
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self.gui.show_frame(self.stack[index])
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def on_double(self, index):
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"override base method"
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"Override base method."
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self.show_source(index)
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def goto_source_line(self):
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class NamespaceViewer:
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"Global/local namespace viewer for debugger GUI."
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def __init__(self, master, title, dict=None):
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width = 0
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@ -544,6 +594,7 @@ def load_dict(self, dict, force=0, rpc_client=None):
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def close(self):
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self.frame.destroy()
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if __name__ == "__main__":
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from unittest import main
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main('idlelib.idle_test.test_debugger', verbosity=2, exit=False)
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@ -1,11 +1,279 @@
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"Test debugger, coverage 19%"
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from idlelib import debugger
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import unittest
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from test.support import requires
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requires('gui')
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from collections import namedtuple
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from textwrap import dedent
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from tkinter import Tk
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from test.support import requires
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import unittest
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from unittest import mock
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from unittest.mock import Mock, patch
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"""A test python script for the debug tests."""
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TEST_CODE = dedent("""
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i = 1
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i += 2
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if i == 3:
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print(i)
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""")
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class MockFrame:
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"Minimal mock frame."
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def __init__(self, code, lineno):
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self.f_code = code
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self.f_lineno = lineno
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class IdbTest(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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cls.gui = Mock()
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cls.idb = debugger.Idb(cls.gui)
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# Create test and code objects to simulate a debug session.
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code_obj = compile(TEST_CODE, 'idlelib/file.py', mode='exec')
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frame1 = MockFrame(code_obj, 1)
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frame1.f_back = None
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frame2 = MockFrame(code_obj, 2)
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frame2.f_back = frame1
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cls.frame = frame2
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cls.msg = 'file.py:2: <module>()'
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def test_init(self):
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# Test that Idb.__init_ calls Bdb.__init__.
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idb = debugger.Idb(None)
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self.assertIsNone(idb.gui)
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self.assertTrue(hasattr(idb, 'breaks'))
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def test_user_line(self):
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# Test that .user_line() creates a string message for a frame.
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self.gui.interaction = Mock()
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self.idb.user_line(self.frame)
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self.gui.interaction.assert_called_once_with(self.msg, self.frame)
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def test_user_exception(self):
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# Test that .user_exception() creates a string message for a frame.
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exc_info = (type(ValueError), ValueError(), None)
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self.gui.interaction = Mock()
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self.idb.user_exception(self.frame, exc_info)
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self.gui.interaction.assert_called_once_with(
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self.msg, self.frame, exc_info)
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class FunctionTest(unittest.TestCase):
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# Test module functions together.
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def test_functions(self):
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rpc_obj = compile(TEST_CODE,'rpc.py', mode='exec')
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rpc_frame = MockFrame(rpc_obj, 2)
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rpc_frame.f_back = rpc_frame
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self.assertTrue(debugger._in_rpc_code(rpc_frame))
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self.assertEqual(debugger._frame2message(rpc_frame),
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'rpc.py:2: <module>()')
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code_obj = compile(TEST_CODE, 'idlelib/debugger.py', mode='exec')
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code_frame = MockFrame(code_obj, 1)
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code_frame.f_back = None
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self.assertFalse(debugger._in_rpc_code(code_frame))
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self.assertEqual(debugger._frame2message(code_frame),
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'debugger.py:1: <module>()')
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code_frame.f_back = code_frame
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self.assertFalse(debugger._in_rpc_code(code_frame))
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code_frame.f_back = rpc_frame
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self.assertTrue(debugger._in_rpc_code(code_frame))
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class DebuggerTest(unittest.TestCase):
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"Tests for Debugger that do not need a real root."
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@classmethod
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def setUpClass(cls):
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cls.pyshell = Mock()
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cls.pyshell.root = Mock()
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cls.idb = Mock()
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with patch.object(debugger.Debugger, 'make_gui'):
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cls.debugger = debugger.Debugger(cls.pyshell, cls.idb)
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cls.debugger.root = Mock()
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def test_cont(self):
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self.debugger.cont()
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self.idb.set_continue.assert_called_once()
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def test_step(self):
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self.debugger.step()
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self.idb.set_step.assert_called_once()
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def test_quit(self):
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self.debugger.quit()
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self.idb.set_quit.assert_called_once()
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|
||||
def test_next(self):
|
||||
with patch.object(self.debugger, 'frame') as frame:
|
||||
self.debugger.next()
|
||||
self.idb.set_next.assert_called_once_with(frame)
|
||||
|
||||
def test_ret(self):
|
||||
with patch.object(self.debugger, 'frame') as frame:
|
||||
self.debugger.ret()
|
||||
self.idb.set_return.assert_called_once_with(frame)
|
||||
|
||||
def test_clear_breakpoint(self):
|
||||
self.debugger.clear_breakpoint('test.py', 4)
|
||||
self.idb.clear_break.assert_called_once_with('test.py', 4)
|
||||
|
||||
def test_clear_file_breaks(self):
|
||||
self.debugger.clear_file_breaks('test.py')
|
||||
self.idb.clear_all_file_breaks.assert_called_once_with('test.py')
|
||||
|
||||
def test_set_load_breakpoints(self):
|
||||
# Test the .load_breakpoints() method calls idb.
|
||||
FileIO = namedtuple('FileIO', 'filename')
|
||||
|
||||
class MockEditWindow(object):
|
||||
def __init__(self, fn, breakpoints):
|
||||
self.io = FileIO(fn)
|
||||
self.breakpoints = breakpoints
|
||||
|
||||
self.pyshell.flist = Mock()
|
||||
self.pyshell.flist.inversedict = (
|
||||
MockEditWindow('test1.py', [4, 4]),
|
||||
MockEditWindow('test2.py', [13, 44, 45]),
|
||||
)
|
||||
self.debugger.set_breakpoint('test0.py', 1)
|
||||
self.idb.set_break.assert_called_once_with('test0.py', 1)
|
||||
self.debugger.load_breakpoints() # Call set_breakpoint 5 times.
|
||||
self.idb.set_break.assert_has_calls(
|
||||
[mock.call('test0.py', 1),
|
||||
mock.call('test1.py', 4),
|
||||
mock.call('test1.py', 4),
|
||||
mock.call('test2.py', 13),
|
||||
mock.call('test2.py', 44),
|
||||
mock.call('test2.py', 45)])
|
||||
|
||||
def test_sync_source_line(self):
|
||||
# Test that .sync_source_line() will set the flist.gotofileline with fixed frame.
|
||||
test_code = compile(TEST_CODE, 'test_sync.py', 'exec')
|
||||
test_frame = MockFrame(test_code, 1)
|
||||
self.debugger.frame = test_frame
|
||||
|
||||
self.debugger.flist = Mock()
|
||||
with patch('idlelib.debugger.os.path.exists', return_value=True):
|
||||
self.debugger.sync_source_line()
|
||||
self.debugger.flist.gotofileline.assert_called_once_with('test_sync.py', 1)
|
||||
|
||||
|
||||
class DebuggerGuiTest(unittest.TestCase):
|
||||
"""Tests for debugger.Debugger that need tk root.
|
||||
|
||||
close needs debugger.top set in make_gui.
|
||||
"""
|
||||
|
||||
@classmethod
|
||||
def setUpClass(cls):
|
||||
requires('gui')
|
||||
cls.root = root = Tk()
|
||||
root.withdraw()
|
||||
cls.pyshell = Mock()
|
||||
cls.pyshell.root = root
|
||||
cls.idb = Mock()
|
||||
# stack tests fail with debugger here.
|
||||
## cls.debugger = debugger.Debugger(cls.pyshell, cls.idb)
|
||||
## cls.debugger.root = root
|
||||
## # real root needed for real make_gui
|
||||
## # run, interacting, abort_loop
|
||||
|
||||
@classmethod
|
||||
def tearDownClass(cls):
|
||||
cls.root.destroy()
|
||||
del cls.root
|
||||
|
||||
def setUp(self):
|
||||
self.debugger = debugger.Debugger(self.pyshell, self.idb)
|
||||
self.debugger.root = self.root
|
||||
# real root needed for real make_gui
|
||||
# run, interacting, abort_loop
|
||||
|
||||
def test_run_debugger(self):
|
||||
self.debugger.run(1, 'two')
|
||||
self.idb.run.assert_called_once_with(1, 'two')
|
||||
self.assertEqual(self.debugger.interacting, 0)
|
||||
|
||||
def test_close(self):
|
||||
# Test closing the window in an idle state.
|
||||
self.debugger.close()
|
||||
self.pyshell.close_debugger.assert_called_once()
|
||||
|
||||
def test_show_stack(self):
|
||||
self.debugger.show_stack()
|
||||
self.assertEqual(self.debugger.stackviewer.gui, self.debugger)
|
||||
|
||||
def test_show_stack_with_frame(self):
|
||||
test_frame = MockFrame(None, None)
|
||||
self.debugger.frame = test_frame
|
||||
|
||||
# Reset the stackviewer to force it to be recreated.
|
||||
self.debugger.stackviewer = None
|
||||
self.idb.get_stack.return_value = ([], 0)
|
||||
self.debugger.show_stack()
|
||||
|
||||
# Check that the newly created stackviewer has the test gui as a field.
|
||||
self.assertEqual(self.debugger.stackviewer.gui, self.debugger)
|
||||
self.idb.get_stack.assert_called_once_with(test_frame, None)
|
||||
|
||||
|
||||
class StackViewerTest(unittest.TestCase):
|
||||
|
||||
@classmethod
|
||||
def setUpClass(cls):
|
||||
requires('gui')
|
||||
cls.root = Tk()
|
||||
cls.root.withdraw()
|
||||
|
||||
@classmethod
|
||||
def tearDownClass(cls):
|
||||
cls.root.destroy()
|
||||
del cls.root
|
||||
|
||||
def setUp(self):
|
||||
self.code = compile(TEST_CODE, 'test_stackviewer.py', 'exec')
|
||||
self.stack = [
|
||||
(MockFrame(self.code, 1), 1),
|
||||
(MockFrame(self.code, 2), 2)
|
||||
]
|
||||
# Create a stackviewer and load the test stack.
|
||||
self.sv = debugger.StackViewer(self.root, None, None)
|
||||
self.sv.load_stack(self.stack)
|
||||
|
||||
def test_init(self):
|
||||
# Test creation of StackViewer.
|
||||
gui = None
|
||||
flist = None
|
||||
master_window = self.root
|
||||
sv = debugger.StackViewer(master_window, flist, gui)
|
||||
self.assertTrue(hasattr(sv, 'stack'))
|
||||
|
||||
def test_load_stack(self):
|
||||
# Test the .load_stack() method against a fixed test stack.
|
||||
# Check the test stack is assigned and the list contains the repr of them.
|
||||
self.assertEqual(self.sv.stack, self.stack)
|
||||
self.assertTrue('?.<module>(), line 1:' in self.sv.get(0))
|
||||
self.assertEqual(self.sv.get(1), '?.<module>(), line 2: ')
|
||||
|
||||
def test_show_source(self):
|
||||
# Test the .show_source() method against a fixed test stack.
|
||||
# Patch out the file list to monitor it
|
||||
self.sv.flist = Mock()
|
||||
# Patch out isfile to pretend file exists.
|
||||
with patch('idlelib.debugger.os.path.isfile', return_value=True) as isfile:
|
||||
self.sv.show_source(1)
|
||||
isfile.assert_called_once_with('test_stackviewer.py')
|
||||
self.sv.flist.open.assert_called_once_with('test_stackviewer.py')
|
||||
|
||||
|
||||
class NameSpaceTest(unittest.TestCase):
|
||||
|
||||
|
@ -23,7 +291,5 @@ def test_init(self):
|
|||
debugger.NamespaceViewer(self.root, 'Test')
|
||||
|
||||
|
||||
# Other classes are Idb, Debugger, and StackViewer.
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main(verbosity=2)
|
||||
|
|
|
@ -133,8 +133,8 @@ class PyShellEditorWindow(EditorWindow):
|
|||
def __init__(self, *args):
|
||||
self.breakpoints = []
|
||||
EditorWindow.__init__(self, *args)
|
||||
self.text.bind("<<set-breakpoint-here>>", self.set_breakpoint_here)
|
||||
self.text.bind("<<clear-breakpoint-here>>", self.clear_breakpoint_here)
|
||||
self.text.bind("<<set-breakpoint>>", self.set_breakpoint_event)
|
||||
self.text.bind("<<clear-breakpoint>>", self.clear_breakpoint_event)
|
||||
self.text.bind("<<open-python-shell>>", self.flist.open_shell)
|
||||
|
||||
#TODO: don't read/write this from/to .idlerc when testing
|
||||
|
@ -155,8 +155,8 @@ def filename_changed_hook(old_hook=self.io.filename_change_hook,
|
|||
("Copy", "<<copy>>", "rmenu_check_copy"),
|
||||
("Paste", "<<paste>>", "rmenu_check_paste"),
|
||||
(None, None, None),
|
||||
("Set Breakpoint", "<<set-breakpoint-here>>", None),
|
||||
("Clear Breakpoint", "<<clear-breakpoint-here>>", None)
|
||||
("Set Breakpoint", "<<set-breakpoint>>", None),
|
||||
("Clear Breakpoint", "<<clear-breakpoint>>", None)
|
||||
]
|
||||
|
||||
def color_breakpoint_text(self, color=True):
|
||||
|
@ -181,11 +181,11 @@ def set_breakpoint(self, lineno):
|
|||
self.breakpoints.append(lineno)
|
||||
try: # update the subprocess debugger
|
||||
debug = self.flist.pyshell.interp.debugger
|
||||
debug.set_breakpoint_here(filename, lineno)
|
||||
debug.set_breakpoint(filename, lineno)
|
||||
except: # but debugger may not be active right now....
|
||||
pass
|
||||
|
||||
def set_breakpoint_here(self, event=None):
|
||||
def set_breakpoint_event(self, event=None):
|
||||
text = self.text
|
||||
filename = self.io.filename
|
||||
if not filename:
|
||||
|
@ -194,7 +194,7 @@ def set_breakpoint_here(self, event=None):
|
|||
lineno = int(float(text.index("insert")))
|
||||
self.set_breakpoint(lineno)
|
||||
|
||||
def clear_breakpoint_here(self, event=None):
|
||||
def clear_breakpoint_event(self, event=None):
|
||||
text = self.text
|
||||
filename = self.io.filename
|
||||
if not filename:
|
||||
|
@ -209,7 +209,7 @@ def clear_breakpoint_here(self, event=None):
|
|||
"insert lineend +1char")
|
||||
try:
|
||||
debug = self.flist.pyshell.interp.debugger
|
||||
debug.clear_breakpoint_here(filename, lineno)
|
||||
debug.clear_breakpoint(filename, lineno)
|
||||
except:
|
||||
pass
|
||||
|
||||
|
|
|
@ -1,3 +1,5 @@
|
|||
# Rename to stackbrowser or possibly consolidate with browser.
|
||||
|
||||
import linecache
|
||||
import os
|
||||
|
||||
|
|
|
@ -0,0 +1,4 @@
|
|||
Add docstrings to the IDLE debugger module. Fix two bugs:
|
||||
initialize Idb.botframe (should be in Bdb); in Idb.in_rpc_code,
|
||||
check whether prev_frame is None before trying to use it.
|
||||
Greatly expand test_debugger.
|
Loading…
Reference in a new issue