Windows: native test wrapper incorrectly escapes arguments [blocking #6622]

[laszlocsomor]

Description of the problem / feature request:

The Windows-native test wrapper should escape arguments when running the test.
To escape them, it should use

bazel/src/tools/launcher/util/launcher_util.h

Line 61 in afeb8d0

std::wstring WindowsEscapeArg2(const std::wstring& arg);

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

BUILD:

py_test(
    name = "testargs",
    srcs = ["testargs.py"],
    args = ["foo", "a b", "", r"c\ d", "\'\'", "bar"],
)

testargs.py:

from __future__ import print_function
import sys
for a in sys.argv[1:]:
    print("arg=(%s)" % a)

Build Bazel from HEAD, e.g. afeb8d0.

Then use this binary:

C:\src\tmp>c:\src\bazel\bazel-bin\src\bazel.exe --incompatible_windows_style_arg_escaping test --incompatible_windows_native_test_wrapper //:testargs -t- --test_output=all
(...)
==================== Test output for //:testargs:
arg=(foo)
arg=(a)
arg=(b)
arg=(c)
arg=(d)
arg=()
arg=(bar)
================================================================================

The desired output is:

arg=(foo)
arg=(a)
arg=(b)
arg=(c d)
arg=()
arg=(bar)

i.e. c d is one argument.

What operating system are you running Bazel on?

windows 10

What's the output of bazel info release?

I built bazel from HEAD (afeb8d0).

Any other information, logs, or outputs that you want to share?

This is blocking #6622