run-tests.py: avoid using popen2.Popen4 - use subprocess instead
Use subprocess to emulate Popen4 if available - similar to how it is done in
util.py.
Using popen2 under python 2.6 gives
DeprecationWarning: The popen2 module is deprecated. Use the subprocess module.
% file not managed
? foo
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 00 state added, options none
not removing bar: file has been marked for add (use -f to force removal)
A bar
./bar
./foo
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
% 01 state clean, options none
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 02 state modified, options none
not removing foo: file is modified (use -f to force removal)
M foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 03 state missing, options none
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 10 state added, options -f
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 11 state clean, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 12 state modified, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 13 state missing, options -f
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 20 state added, options -A
not removing bar: file still exists (use -f to force removal)
A bar
./bar
./foo
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
% 21 state clean, options -A
not removing foo: file still exists (use -f to force removal)
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 22 state modified, options -A
not removing foo: file still exists (use -f to force removal)
M foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 23 state missing, options -A
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 30 state added, options -Af
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 31 state clean, options -Af
R foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 32 state modified, options -Af
R foo
./foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% 33 state missing, options -Af
R foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding test/bar
adding test/foo
% dir, options none
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -f
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -A
not removing test/foo: file still exists (use -f to force removal)
removing test/bar
R test/bar
./foo
./test/foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% dir, options -Af
removing test/bar
removing test/foo
R test/bar
R test/foo
./foo
./test/foo
2 files updated, 0 files merged, 0 files removed, 0 files unresolved