#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#

test_description='Same rename detection as t4003 but testing diff-raw.

'
. ./test-lib.sh

compare_diff_raw () {
    # When heuristics are improved, the score numbers would change.
    # Ignore them while comparing.
    sed -e 's/ \([CR]\)[0-9]*	/\1#/' <"$1" >.tmp-1
    sed -e 's/ \([CR]\)[0-9]*	/\1#/' <"$2" >.tmp-2
    diff -u .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
}

compare_diff_patch () {
    # When heuristics are improved, the score numbers would change.
    # Ignore them while comparing.
    sed -e '/^similarity index [0-9]*%$/d' <"$1" >.tmp-1
    sed -e '/^similarity index [0-9]*%$/d' <"$2" >.tmp-2
    diff -u .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
}

test_expect_success \
    'prepare reference tree' \
    'cat ../../COPYING >COPYING &&
     echo frotz >rezrov &&
    git-update-cache --add COPYING rezrov &&
    tree=$(git-write-tree) &&
    echo $tree'

test_expect_success \
    'prepare work tree' \
    'sed -e 's/HOWEVER/However/' <COPYING >COPYING.1 &&
    sed -e 's/GPL/G.P.L/g' <COPYING >COPYING.2 &&
    rm -f COPYING &&
    git-update-cache --add --remove COPYING COPYING.?'

# tree has COPYING and rezrov.  work tree has COPYING.1 and COPYING.2,
# both are slightly edited, and unchanged rezrov.  We say COPYING.1
# and COPYING.2 are based on COPYING, and do not say anything about
# rezrov.

git-diff-cache -M $tree >current

cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234	COPYING	COPYING.1
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 06c67961bbaed34a127f76d261f4c0bf73eda471 R1234	COPYING	COPYING.2
EOF

test_expect_success \
    'validate output from rename/copy detection (#1)' \
    'compare_diff_raw current expected'

# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
diff --git a/COPYING b/COPYING.2
rename old COPYING
rename new COPYING.2
--- a/COPYING
+++ b/COPYING.2
@@ -2 +2 @@
- Note that the only valid version of the GPL as far as this project
+ Note that the only valid version of the G.P.L as far as this project
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
@@ -12 +12 @@
-	This file is licensed under the GPL v2, or a later version
+	This file is licensed under the G.P.L v2, or a later version
EOF

test_expect_success \
    'validate output from diff-helper (#1)' \
    'compare_diff_patch current expected'

################################################################

test_expect_success \
    'prepare work tree again' \
    'mv COPYING.2 COPYING &&
     git-update-cache --add --remove COPYING COPYING.1 COPYING.2'

# tree has COPYING and rezrov.  work tree has COPYING and COPYING.1,
# both are slightly edited, and unchanged rezrov.  We say COPYING.1
# is based on COPYING and COPYING is still there, and do not say anything
# about rezrov.

git-diff-cache -C $tree >current
cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234	COPYING	COPYING.1
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 06c67961bbaed34a127f76d261f4c0bf73eda471 M	COPYING
EOF

test_expect_success \
    'validate output from rename/copy detection (#2)' \
    'compare_diff_raw current expected'

test_expect_success \
    'prepare work tree once again' \
    'cat ../../COPYING >COPYING &&
     git-update-cache --add --remove COPYING COPYING.1'

# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
diff --git a/COPYING b/COPYING
--- a/COPYING
+++ b/COPYING
@@ -2 +2 @@
- Note that the only valid version of the GPL as far as this project
+ Note that the only valid version of the G.P.L as far as this project
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
@@ -12 +12 @@
-	This file is licensed under the GPL v2, or a later version
+	This file is licensed under the G.P.L v2, or a later version
EOF

test_expect_success \
    'validate output from diff-helper (#2)' \
    'compare_diff_patch current expected'

################################################################

# tree has COPYING and rezrov.  work tree has the same COPYING and
# copy-edited COPYING.1, and unchanged rezrov.  We should see
# unmodified COPYING in the output, so that downstream diff-helper can
# notice.  We should not say anything about rezrov.

git-diff-cache -C $tree >current
cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234	COPYING	COPYING.1
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M	COPYING
EOF

test_expect_success \
    'validate output from rename/copy detection (#3)' \
    'compare_diff_raw current expected'

# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
EOF

test_expect_success \
    'validate output from diff-helper (#3)' \
    'compare_diff_patch current expected'

test_done