Fix bug #548 - Transpose when empty line crashes · experimentAccount0/bpython@c08b42d · GitHub

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Fix bug bpython#548 - Transpose when empty line crashes

1 parent a17999d commit c08b42d
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2 files changed

+14-2Lines changed: 14 additions & 2 deletions

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• bpython
  • curtsiesfrontend
    • manual_readline.py
  • test
    • test_manual_readline.py

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‎bpython/curtsiesfrontend/manual_readline.py‎

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+4-2Lines changed: 4 additions & 2 deletions

Original file line number	Diff line number	Diff line change
@@ -280,11 +280,13 @@ def yank_prev_killed_text(cursor_offset, line, cut_buffer):
280	280
281	281	@edit_keys.on(config='transpose_chars_key')
282	282	def transpose_character_before_cursor(cursor_offset, line):
	283	+ if cursor_offset == 0:
	284	+ return cursor_offset, line
283	285	return (min(len(line), cursor_offset + 1),
284		- line[:cursor_offset-1] +
	286	+ line[:cursor_offset - 1] +
285	287	(line[cursor_offset] if len(line) > cursor_offset else '') +
286	288	line[cursor_offset - 1] +
287		- line[cursor_offset+1:])
	289	+ line[cursor_offset + 1:])
288	290
289	291
290	292	@edit_keys.on('<Esc+t>')

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‎bpython/test/test_manual_readline.py‎

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+10Lines changed: 10 additions & 0 deletions

Original file line number	Diff line number	Diff line change
@@ -201,6 +201,16 @@ def test_transpose_character_before_cursor(self):
201	201	"adf s|asdf",
202	202	"adf as|sdf"], transpose_character_before_cursor)
203	203
	204	+ def test_transpose_empty_line(self):
	205	+ self.assertEquals(transpose_character_before_cursor(0, ''),
	206	+ (0,''))
	207	+
	208	+ def test_transpose_first_character(self):
	209	+ self.assertEquals(transpose_character_before_cursor(0, 'a'),
	210	+ transpose_character_before_cursor(0, 'a'))
	211	+ self.assertEquals(transpose_character_before_cursor(0, 'as'),
	212	+ transpose_character_before_cursor(0, 'as'))
	213	+
204	214	def test_transpose_word_before_cursor(self):
205	215	pass
206	216

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