Some refactoring. New test case.

mitmproxy/tools/console/commander/commander.py

@@ -160,7 +160,7 @@ class CommandBuffer:
 
 class CommandHistory:
     def __init__(self, master: mitmproxy.master.Master, size: int=30) -> None:
-        self.history: collections.deque = collections.deque(
+        self.saved_commands: collections.deque = collections.deque(
             [CommandBuffer(master, "")],
             maxlen=size
         )
@@ -168,27 +168,28 @@ class CommandHistory:
 
     @property
     def last_index(self):
-        return len(self.history) - 1
+        return len(self.saved_commands) - 1
 
     def get_next(self) -> typing.Optional[CommandBuffer]:
         if self.index < self.last_index:
             self.index = self.index + 1
-            return self.history[self.index]
+            return self.saved_commands[self.index]
         return None
 
     def get_prev(self) -> typing.Optional[CommandBuffer]:
         if self.index > 0:
             self.index = self.index - 1
-            return self.history[self.index]
+            return self.saved_commands[self.index]
         return None
 
     def add_command(self, command: CommandBuffer, execution: bool=False) -> None:
         if self.index == self.last_index or execution:
-            last_item_empty = not self.history[-1].text
-            if self.history[-1].text == command.text or (last_item_empty and execution):
-                self.history[-1] = copy.copy(command)
+            last_item = self.saved_commands[-1]
+            last_item_empty = not last_item.text
+            if last_item.text == command.text or (last_item_empty and execution):
+                self.saved_commands[-1] = copy.copy(command)
             else:
-                self.history.append(command)
+                self.saved_commands.append(command)
                 if not execution and self.index < self.last_index:
                     self.index += 1
             if execution:

mitmproxy/tools/console/statusbar.py

@@ -100,7 +100,8 @@ class ActionBar(urwid.WidgetWrap):
 
     def sig_prompt_command(self, sender, partial=""):
         signals.focus.send(self, section="footer")
-        self._w = commander.CommandEdit(self.master, partial, self.command_history)
+        self._w = commander.CommandEdit(self.master, partial,
+                                        self.command_history)
         self.prompting = commandexecutor.CommandExecutor(self.master)
 
     def sig_prompt_onekey(self, sender, prompt, keys, callback, args=()):

test/mitmproxy/tools/console/test_commander.py

@@ -41,20 +41,31 @@ class TestCommandHistory:
         commands = ["command1", "command2"]
         history, tctx_master = self.fill_history(commands)
 
-        history_commands = [buf.text for buf in history.history]
-        assert history_commands == [""] + commands
+        saved_commands = [buf.text for buf in history.saved_commands]
+        assert saved_commands == [""] + commands
 
-        # The history size is only 3. So, we forget the first one command,
-        # when adding fourth command
+        # The history size is only 3. So, we forget the first
+        # one command, when adding fourth command
         cbuf = commander.CommandBuffer(tctx_master, "command3")
         history.add_command(cbuf)
-        history_commands = [buf.text for buf in history.history]
-        assert history_commands == commands + ["command3"]
+        saved_commands = [buf.text for buf in history.saved_commands]
+        assert saved_commands == commands + ["command3"]
 
         # Commands with the same text are not repeated in the history one by one
         history.add_command(cbuf)
-        history_commands = [buf.text for buf in history.history]
-        assert history_commands == commands + ["command3"]
+        saved_commands = [buf.text for buf in history.saved_commands]
+        assert saved_commands == commands + ["command3"]
+
+        # adding command in execution mode sets index at the beginning of the history
+        # and replace the last command buffer if it is empty or has the same text
+        cbuf = commander.CommandBuffer(tctx_master, "")
+        history.add_command(cbuf)
+        history.index = 0
+        cbuf = commander.CommandBuffer(tctx_master, "command4")
+        history.add_command(cbuf, True)
+        assert history.index == history.last_index
+        saved_commands = [buf.text for buf in history.saved_commands]
+        assert saved_commands == ["command2", "command3", "command4"]
 
     def test_get_next(self):
         commands = ["command1", "command2"]