tests/test-eol-update

tests: don't match blank output lines as regexes in unified tests

Currently, the following unified test will pass:

  $ echo foo


A blank output line (a line containing just two spaces) will match any
output.

The patch modifies the unified test runner to ignore empty strings
strings when do regular expression matching.

#!/bin/sh

cat > $HGRCPATH <<EOF
[diff]
git = 1
EOF

seteol () {
    if [ $1 = "LF" ]; then
        EOL='\n'
    else
        EOL='\r\n'
    fi
}

makerepo () {
    echo
    echo "# ==== setup repository ===="
    echo '% hg init'
    hg init repo
    cd repo

    cat > .hgeol <<EOF
[patterns]
**.txt = LF
EOF

    printf "first\nsecond\nthird\n" > a.txt
    hg commit --addremove -m 'LF commit'

    cat > .hgeol <<EOF
[patterns]
**.txt = CRLF
EOF

    printf "first\r\nsecond\r\nthird\r\n" > a.txt
    hg commit -m 'CRLF commit'

    cd ..
}

dotest () {
    seteol $1

    echo
    echo "% hg clone repo repo-$1"
    hg clone --noupdate repo repo-$1
    cd repo-$1

    cat > .hg/hgrc <<EOF
[extensions]
eol =
EOF

    hg update

    echo '% printrepr.py a.txt (before)'
    python $TESTDIR/printrepr.py < a.txt

    printf "first${EOL}third${EOL}" > a.txt

    echo '% printrepr.py a.txt (after)'
    python $TESTDIR/printrepr.py < a.txt
    echo '% hg diff'
    hg diff | python $TESTDIR/printrepr.py

    echo '% hg update 0'
    hg update 0

    echo '% printrepr.py a.txt'
    python $TESTDIR/printrepr.py < a.txt
    echo '% hg diff'
    hg diff | python $TESTDIR/printrepr.py


    cd ..
    rm -r repo-$1
}

makerepo
dotest LF
dotest CRLF
rm -r repo