#!/bin/sh

test_description='rewrite diff on binary file'

. ./test-lib.sh

# We must be large enough to meet the MINIMUM_BREAK_SIZE
# requirement.
make_file() {
        # common first line to help identify rewrite versus regular diff
        printf "=\n" >file
        for i in 1 2 3 4 5 6 7 8 9 10
        do
                for j in 1 2 3 4 5 6 7 8 9
                do
                        for k in 1 2 3 4 5
                        do
                                printf "$1\n"
                        done
                done
        done >>file
}

test_expect_success 'create binary file with changes' '
        make_file "\\0" &&
        git add file &&
        make_file "\\01"
'

test_expect_success 'vanilla diff is binary' '
        git diff >diff &&
        grep "Binary files a/file and b/file differ" diff
'

test_expect_success 'rewrite diff is binary' '
        git diff -B >diff &&
        grep "dissimilarity index" diff &&
        grep "Binary files a/file and b/file differ" diff
'

test_expect_success 'rewrite diff can show binary patch' '
        git diff -B --binary >diff &&
        grep "dissimilarity index" diff &&
        grep "GIT binary patch" diff
'

test_expect_success 'rewrite diff --stat shows binary changes' '
        git diff -B --stat --summary >diff &&
        grep "Bin" diff &&
        grep "0 insertions.*0 deletions" diff &&
        grep " rewrite file" diff
'

{
        echo "#!$SHELL_PATH"
        cat <<'EOF'
perl -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
EOF
} >dump
chmod +x dump

test_expect_success 'setup textconv' '
        echo file diff=foo >.gitattributes &&
        git config diff.foo.textconv "\"$(pwd)\""/dump
'

test_expect_success 'rewrite diff respects textconv' '
        git diff -B >diff &&
        grep "dissimilarity index" diff &&
        grep "^-61" diff &&
        grep "^-0" diff
'

test_done