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terminalwriter: compute width_of_current_line lazily 

Currently this property is computed eagerly, which means
get_line_width() is computed on everything written, but that is a slow
function.

Compute it lazily, so that get_line_width() only runs when needed.
This commit is contained in:
Ran Benita 2020-04-29 18:14:57 +03:00
parent dd32c72ff0
commit d5584c7207
1 changed files with 4 additions and 4 deletions
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8
src/_pytest/_io/terminalwriter.py
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@ -83,7 +83,7 @@ class TerminalWriter:
assert file is not None
self._file = file
self.hasmarkup = should_do_markup(file)
self._width_of_current_line = 0
self._current_line = ""
self._terminal_width = None # type: Optional[int]
@property
@ -99,7 +99,7 @@ class TerminalWriter:
@property
def width_of_current_line(self) -> int:
"""Return an estimate of the width so far in the current line."""
return self._width_of_current_line
return get_line_width(self._current_line)
def markup(self, text: str, **kw: bool) -> str:
esc = []
@ -153,9 +153,9 @@ class TerminalWriter:
if msg:
current_line = msg.rsplit("\n", 1)[-1]
if "\n" in msg:
self._width_of_current_line = get_line_width(current_line)
self._current_line = current_line
else:
self._width_of_current_line += get_line_width(current_line)
self._current_line += current_line
if self.hasmarkup and kw:
markupmsg = self.markup(msg, **kw)