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test_wrapping.py
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test_wrapping.py
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# Copyright 2009 Mark Seaborn <mrs@mythic-beasts.com>
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose is hereby granted without fee,
# provided that the above copyright notice appear in all copies and
# that both that copyright notice and this permission notice appear in
# supporting documentation.
#
# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import time
import unittest
import gobject
import vte
import pyrepl.reader
import pyrepl.unix_console
class TestWrappingLongLines(unittest.TestCase):
# Test that Reader wraps lines correctly before passing them to
# UnixConsole.
def make_example_reader(self):
console = pyrepl.unix_console.UnixConsole()
reader = pyrepl.reader.Reader(console)
reader.ps1 = "foo$"
reader.prepare()
reader.restore() # Don't screw up terminal
reader.console.width = 10
reader.buffer = list("01234567890123456789")
return reader
def check_output(self, reader, lines):
for line in lines:
assert len(line) <= reader.console.width
# Check cursor position consistency.
for index, char in enumerate("".join(reader.buffer)):
x, y = reader.pos2xy(index)
self.assertEquals(lines[y][x], char)
def test_wrapping(self):
reader = self.make_example_reader()
lines = reader.calc_screen()
self.assertEquals(lines,
["foo$01234\\", "567890123\\", "456789"])
self.check_output(reader, lines)
def test_wrapping_without_backslashes(self):
reader = self.make_example_reader()
reader.wrap_marker = ""
lines = reader.calc_screen()
self.assertEquals(lines,
["foo$012345", "6789012345", "6789"])
self.check_output(reader, lines)
def test_wrapping_long_prompts(self):
reader = self.make_example_reader()
reader.wrap_marker = ""
reader._ps1 = "0123456789foo$"
lines = reader.calc_screen()
self.assertEquals(lines,
["0123456789",
"foo$012345", "6789012345", "6789"])
self.check_output(reader, lines)
def test_wrapping_status_message(self):
reader = self.make_example_reader()
reader.msg = "status1status2status3status4"
lines = reader.calc_screen()
self.assertEquals(lines,
["foo$01234\\", "567890123\\", "456789",
"status1st\\", "atus2stat\\", "us3status\\", "4"])
self.check_output(reader, lines)
reader.msg_at_bottom = False
lines = reader.calc_screen()
self.assertEquals(lines,
["status1st\\", "atus2stat\\", "us3status\\", "4",
"foo$01234\\", "567890123\\", "456789"])
self.check_output(reader, lines)
# There should be no empty line when the message exactly fills
# the last line.
reader.msg = "status1status2status3status"
lines = reader.calc_screen()
self.assertEquals(lines,
["status1st\\", "atus2stat\\", "us3status",
"foo$01234\\", "567890123\\", "456789"])
self.check_output(reader, lines)
class VTEConsole(pyrepl.unix_console.UnixConsole):
def __init__(self, terminal):
self._terminal = terminal
pyrepl.unix_console.UnixConsole.__init__(self, f_in=None, term="xterm")
# TODO: Don't use __ attributes in UnixConsole
def flushoutput(self):
for text, iscode in self._UnixConsole__buffer:
self._terminal.feed(text.encode(self.encoding))
del self._UnixConsole__buffer[:]
def _update_size(self):
pass
def get_vte_text(vte_terminal):
# VTE updates the terminal in the event loop after a
# non-configurable timeout, so we have to work around that.
time.sleep(0.05)
while gobject.main_context_default().iteration(False):
pass
return vte_terminal.get_text(lambda *args: True)
class TestUnixConsole(unittest.TestCase):
def test_soft_newlines(self):
terminal = vte.Terminal()
terminal.set_size(10, 10)
console = VTEConsole(terminal)
console.width = 10
console.height = 10
console.prepare()
# Check that a soft newline occurs.
console.refresh(["0123456789",
"abcdefg"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"0123456789abcdefg" + "\n" * 9)
# Check switching from soft newline to hard newline.
# The chars "89" should disappear from the display.
console.refresh(["01234567",
"abcdefg"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"01234567\nabcdefg" + "\n" * 9)
# Test shortening the last line.
console.refresh(["0123456789",
"abcd"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"0123456789abcd" + "\n" * 9)
def test_soft_newlines_positioning(self):
terminal = vte.Terminal()
terminal.set_size(10, 10)
console = VTEConsole(terminal)
console.width = 10
console.height = 10
console.prepare()
# Check that positioning is correct when starting from the
# middle of the terminal.
terminal.feed("\n\n")
console.refresh(["012345678"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"\n\n012345678" + "\n" * 8)
self.assertEquals(terminal.get_cursor_position(), (0, 2))
# pyrepl's Reader produces empty lines.
console.refresh(["0123456789", ""], (0, 0))
self.assertEquals(get_vte_text(terminal),
"\n\n0123456789" + "\n" * 8)
self.assertEquals(terminal.get_cursor_position(), (0, 2))
console.refresh(["0123456789", "a"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"\n\n0123456789a" + "\n" * 7)
self.assertEquals(terminal.get_cursor_position(), (0, 2))
def test_bottom_of_screen(self):
# We should be able to write in the bottom line of the screen.
terminal = vte.Terminal()
terminal.set_size(10, 10)
console = VTEConsole(terminal)
console.width = 10
console.height = 10
console.prepare()
terminal.feed("\n" * 20)
console.refresh(["hello"], (0, 0))
self.assertEquals(get_vte_text(terminal),
"\n" * 9 + "hello\n")
console.refresh(["hello", ""], (0, 0))
self.assertEquals(get_vte_text(terminal),
"\n" * 8 + "hello\n\n")
if __name__ == "__main__":
unittest.main()