tests/test-casefolding

workingctx: correctly compute the flag for noexec filesystems+merge

This bug happens if the filesystem doesn't support exec-bit, during merges,
for example in 24ed7a541f23 on the hg repo.
If f is not in p1, but is in p2 and has the x-bit in p2, since the dirstate is
based on p1, and the FS doesn't support the exec-bit, the dirstate can't
"guess" the right bit.
We instead fix it in workingcontext.flags()/manifest.

#!/bin/sh

"$TESTDIR/hghave" icasefs || exit 80

echo '% test file addition with bad case'
hg init repo1
cd repo1
echo a > a
hg add A
hg st
hg ci -m adda
hg manifest
cd ..

echo '% test case collision on rename (issue 750)'
hg init repo2
cd repo2
echo a > a
hg --debug ci -Am adda
hg mv a A
# 'a' used to be removed under windows
test -f a || echo 'a is missing'
hg st
cd ..

echo '% test case collision between revisions (issue 912)'
hg init repo3
cd repo3
echo a > a
hg ci -Am adda
hg rm a
hg ci -Am removea
echo A > A
# on linux hfs keeps the old case stored, force it
mv a aa
mv aa A
hg ci -Am addA
# Used to fail under case insensitive fs
hg up -C 0
hg up -C
cd ..