#!/bin/sh

test_description='rewrite diff'

. ./test-lib.sh

test_expect_success setup '

        cat "$TEST_DIRECTORY"/../COPYING >test &&
        git add test &&
        tr \
          "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ" \
          "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM" \
          <"$TEST_DIRECTORY"/../COPYING >test &&
        echo "to be deleted" >test2 &&
        git add test2

'

test_expect_success 'detect rewrite' '

        actual=$(git diff-files -B --summary test) &&
        expr "$actual" : " rewrite test ([0-9]*%)$" || {
                echo "Eh? <<$actual>>"
                false
        }

'

cat >expect <<EOF
diff --git a/test2 b/test2
deleted file mode 100644
index 4202011..0000000
--- a/test2
+++ /dev/null
@@ -1 +0,0 @@
-to be deleted
EOF
test_expect_success 'show deletion diff without -D' '

        rm test2 &&
        git diff -- test2 >actual &&
        test_cmp expect actual
'

cat >expect <<EOF
diff --git a/test2 b/test2
deleted file mode 100644
index 4202011..0000000
EOF
test_expect_success 'suppress deletion diff with -D' '

        git diff -D -- test2 >actual &&
        test_cmp expect actual
'

test_expect_success 'show deletion diff with -B' '

        git diff -B -- test >actual &&
        grep "Linus Torvalds" actual
'

test_expect_success 'suppress deletion diff with -B -D' '

        git diff -B -D -- test >actual &&
        grep -v "Linus Torvalds" actual
'

test_done