Add deltifier test.

This test kicks in only if you built test-delta executable, and
makes sure that the basic delta routine is working properly even
on empty files.

This commit is to make sure we have a test to catch the
breakage.  The delitifier code is still broken, which will be
fixed with the next commit.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 43 insertions, 0 deletions

diff --git a/t/t0001-delta.sh b/t/t0001-delta.sh
new file mode 100755
index 0000000000..2dd88e503d
--- /dev/null
+++ b/t/t0001-delta.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+test_description='Deltification regression test'
+
+../test-delta 2>/dev/null
+test $? == 127 && {
+	echo "* Skipping test-delta regression test."
+	exit 0
+}
+
+. ./test-lib.sh
+
+>empty
+echo small >small
+echo smallish >smallish
+cat ../../COPYING >large
+sed -e 's/GNU/G.N.U/g' large >largish
+
+test_expect_success 'No regression in deltify code' \
+'
+fail=0
+for src in empty small smallish large largish
+do
+    for dst in empty small smallish large largish
+    do
+	if  test-delta -d $src $dst delta-$src-$dst &&
+	    test-delta -p $src delta-$src-$dst out-$src-$dst &&
+	    cmp $dst out-$src-$dst
+	then
+	    echo "* OK ($src->$dst deitify and apply)"
+	else
+	    echo "* FAIL ($src->$dst deitify and apply)"
+	    fail=1
+	fi
+    done
+done
+case "$fail" in
+0) (exit 0) ;;
+*) (exit $fail) ;;
+esac
+'
+
+test_done