Added support for case-insensitive tab-completion of cmd2 command names

Author: tleonhardt

CHANGES.md

@@ -11,6 +11,8 @@ News
     * <Ctrl>+D now properly quits when case-sensitive command parsing is enabled
     * Fixed some pyperclip clipboard interaction bugs on Linux
     * Fixed some timing bugs when running unit tests in parallel by using monkeypatch
+* Enhancements
+    * Enhanced tab-completion of cmd2 command names to support case-insensitive completion
 
 0.7.5
 -----

cmd2.py

@@ -582,8 +582,12 @@ def colorize(self, val, color):
     # noinspection PyMethodOverriding
     def completenames(self, text, line, begidx, endidx):
         """Override of cmd2 method which completes command names both for command completion and help."""
+        command = text
+        if self.case_insensitive:
+            command = text.lower()
+
         # Call super class method.  Need to do it this way for Python 2 and 3 compatibility
-        cmd_completion = cmd.Cmd.completenames(self, text)
+        cmd_completion = cmd.Cmd.completenames(self, command)
 
         # If we are completing the initial command name and get exactly 1 result and are at end of line, add a space
         if begidx == 0 and len(cmd_completion) == 1 and endidx == len(line):

tests/test_completion.py

@@ -20,6 +20,12 @@ def cmd2_app():
     c = cmd2.Cmd()
     return c
 
+@pytest.fixture
+def cs_app():
+    cmd2.Cmd.case_insensitive = False
+    c = cmd2.Cmd()
+    return c
+
 
 def test_cmd2_command_completion_single_end(cmd2_app):
     text = 'he'
@@ -29,6 +35,22 @@ def test_cmd2_command_completion_single_end(cmd2_app):
     # It is at end of line, so extra space is present
     assert cmd2_app.completenames(text, line, begidx, endidx) == ['help ']
 
+def test_cmd2_command_completion_is_case_insensitive_by_default(cmd2_app):
+    text = 'HE'
+    line = 'HE'
+    endidx = len(line)
+    begidx = endidx - len(text)
+    # It is at end of line, so extra space is present
+    assert cmd2_app.completenames(text, line, begidx, endidx) == ['help ']
+
+def test_cmd2_case_sensitive_command_completion(cs_app):
+    text = 'HE'
+    line = 'HE'
+    endidx = len(line)
+    begidx = endidx - len(text)
+    # It is at end of line, so extra space is present
+    assert cs_app.completenames(text, line, begidx, endidx) == []
+
 def test_cmd2_command_completion_single_mid(cmd2_app):
     text = 'he'
     line = 'he'