#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='Test rename detection in diff engine.'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-diff.sh
test_expect_success 'setup' '
cat >path0 <<-\EOF &&
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
line 11
Line 12
Line 13
Line 14
Line 15
EOF
cat >expected <<-\EOF &&
diff --git a/path0 b/path1
rename from path0
rename to path1
--- a/path0
+++ b/path1
@@ -8,7 +8,7 @@ Line 7
Line 8
Line 9
Line 10
-line 11
+Line 11
Line 12
Line 13
Line 14
EOF
cat >no-rename <<-\EOF
diff --git a/path0 b/path0
deleted file mode 100644
index fdbec44..0000000
--- a/path0
+++ /dev/null
@@ -1,15 +0,0 @@
-Line 1
-Line 2
-Line 3
-Line 4
-Line 5
-Line 6
-Line 7
-Line 8
-Line 9
-Line 10
-line 11
-Line 12
-Line 13
-Line 14
-Line 15
diff --git a/path1 b/path1
new file mode 100644
index 0000000..752c50e
--- /dev/null
+++ b/path1
@@ -0,0 +1,15 @@
+Line 1
+Line 2
+Line 3
+Line 4
+Line 5
+Line 6
+Line 7
+Line 8
+Line 9
+Line 10
+Line 11
+Line 12
+Line 13
+Line 14
+Line 15
EOF
'
test_expect_success \
'update-index --add a file.' \
'git update-index --add path0'
test_expect_success \
'write that tree.' \
'tree=$(git write-tree) && echo $tree'
sed -e 's/line/Line/' <path0 >path1
rm -f path0
test_expect_success \
'renamed and edited the file.' \
'git update-index --add --remove path0 path1'
test_expect_success \
'git diff-index -p -M after rename and editing.' \
'git diff-index -p -M $tree >current'
test_expect_success \
'validate the output.' \
'compare_diff_patch current expected'
test_expect_success 'test diff.renames=true' '
git -c diff.renames=true diff --cached $tree >current &&
compare_diff_patch current expected
'
test_expect_success 'test diff.renames=false' '
git -c diff.renames=false diff --cached $tree >current &&
compare_diff_patch current no-rename
'
test_expect_success 'test diff.renames unset' '
git diff --cached $tree >current &&
compare_diff_patch current expected
'
test_expect_success 'favour same basenames over different ones' '
cp path1 another-path &&
git add another-path &&
git commit -m 1 &&
git rm path1 &&
mkdir subdir &&
git mv another-path subdir/path1 &&
git status >out &&
test_grep "renamed: .*path1 -> subdir/path1" out
'
test_expect_success 'test diff.renames=true for git status' '
git -c diff.renames=true status >out &&
test_grep "renamed: .*path1 -> subdir/path1" out
'
test_expect_success 'test diff.renames=false for git status' '
git -c diff.renames=false status >out &&
test_grep ! "renamed: .*path1 -> subdir/path1" out &&
test_grep "new file: .*subdir/path1" out &&
test_grep "deleted: .*[^/]path1" out
'
test_expect_success 'favour same basenames even with minor differences' '
git show HEAD:path1 | sed "s/15/16/" > subdir/path1 &&
git status >out &&
test_grep "renamed: .*path1 -> subdir/path1" out
'
test_expect_success 'two files with same basename and same content' '
git reset --hard &&
mkdir -p dir/A dir/B &&
cp path1 dir/A/file &&
cp path1 dir/B/file &&
git add dir &&
git commit -m 2 &&
git mv dir other-dir &&
git status >out &&
test_grep "renamed: .*dir/A/file -> other-dir/A/file" out
'
test_expect_success 'setup for many rename source candidates' '
git reset --hard &&
for i in 0 1 2 3 4 5 6 7 8 9;
do
for j in 0 1 2 3 4 5 6 7 8 9;
do
echo "$i$j" >"path$i$j" || return 1
done
done &&
git add "path??" &&
test_tick &&
git commit -m "hundred" &&
(cat path1 && echo new) >new-path &&
echo old >>path1 &&
git add new-path path1 &&
git diff -l 4 -C -C --cached --name-status >actual 2>actual.err &&
sed -e "s/^\([CM]\)[0-9]* /\1 /" actual >actual.munged &&
cat >expect <<-EOF &&
C path1 new-path
M path1
EOF
test_cmp expect actual.munged &&
grep warning actual.err
'
test_expect_success 'rename pretty print with nothing in common' '
mkdir -p a/b/ &&
: >a/b/c &&
git add a/b/c &&
git commit -m "create a/b/c" &&
mkdir -p c/b/ &&
git mv a/b/c c/b/a &&
git commit -m "a/b/c -> c/b/a" &&
git diff -M --summary HEAD^ HEAD >output &&
test_grep " a/b/c => c/b/a " output &&
git diff -M --stat HEAD^ HEAD >output &&
test_grep " a/b/c => c/b/a " output
'
test_expect_success 'rename pretty print with common prefix' '
mkdir -p c/d &&
git mv c/b/a c/d/e &&
git commit -m "c/b/a -> c/d/e" &&
git diff -M --summary HEAD^ HEAD >output &&
test_grep " c/{b/a => d/e} " output &&
git diff -M --stat HEAD^ HEAD >output &&
test_grep " c/{b/a => d/e} " output
'
test_expect_success 'rename pretty print with common suffix' '
mkdir d &&
git mv c/d/e d/e &&
git commit -m "c/d/e -> d/e" &&
git diff -M --summary HEAD^ HEAD >output &&
test_grep " {c/d => d}/e " output &&
git diff -M --stat HEAD^ HEAD >output &&
test_grep " {c/d => d}/e " output
'
test_expect_success 'rename pretty print with common prefix and suffix' '
mkdir d/f &&
git mv d/e d/f/e &&
git commit -m "d/e -> d/f/e" &&
git diff -M --summary HEAD^ HEAD >output &&
test_grep " d/{ => f}/e " output &&
git diff -M --stat HEAD^ HEAD >output &&
test_grep " d/{ => f}/e " output
'
test_expect_success 'rename pretty print common prefix and suffix overlap' '
mkdir d/f/f &&
git mv d/f/e d/f/f/e &&
git commit -m "d/f/e d/f/f/e" &&
git diff -M --summary HEAD^ HEAD >output &&
test_grep " d/f/{ => f}/e " output &&
git diff -M --stat HEAD^ HEAD >output &&
test_grep " d/f/{ => f}/e " output
'
test_expect_success 'diff-tree -l0 defaults to a big rename limit, not zero' '
test_write_lines line1 line2 line3 >myfile &&
git add myfile &&
git commit -m x &&
test_write_lines line1 line2 line4 >myotherfile &&
git rm myfile &&
git add myotherfile &&
git commit -m x &&
git diff-tree -M -l0 HEAD HEAD^ >actual &&
# Verify that a rename from myotherfile to myfile was detected
grep "myotherfile.*myfile" actual
'
test_expect_success 'basename similarity vs best similarity' '
mkdir subdir &&
test_write_lines line1 line2 line3 line4 line5 \
line6 line7 line8 line9 line10 >subdir/file.txt &&
git add subdir/file.txt &&
git commit -m "base txt" &&
git rm subdir/file.txt &&
test_write_lines line1 line2 line3 line4 line5 \
line6 line7 line8 >file.txt &&
test_write_lines line1 line2 line3 line4 line5 \
line6 line7 line8 line9 >file.md &&
git add file.txt file.md &&
git commit -a -m "rename" &&
git diff-tree -r -M --name-status HEAD^ HEAD >actual &&
# subdir/file.txt is 88% similar to file.md, 78% similar to file.txt,
# but since same basenames are checked first...
cat >expected <<-\EOF &&
A file.md
R078 subdir/file.txt file.txt
EOF
test_cmp expected actual
'
test_expect_success 'last line matters too' '
{
test_write_lines a 0 1 2 3 4 5 6 7 8 9 &&
printf "git ignores final up to 63 characters if not newline terminated"
} >no-final-lf &&
git add no-final-lf &&
git commit -m "original version of file with no final newline" &&
# Change ONLY the first character of the whole file
{
test_write_lines b 0 1 2 3 4 5 6 7 8 9 &&
printf "git ignores final up to 63 characters if not newline terminated"
} >no-final-lf &&
git add no-final-lf &&
git mv no-final-lf still-absent-final-lf &&
git commit -a -m "rename no-final-lf -> still-absent-final-lf" &&
git diff-tree -r -M --name-status HEAD^ HEAD >actual &&
sed -e "s/^R[0-9]* /R /" actual >actual.munged &&
cat >expected <<-\EOF &&
R no-final-lf still-absent-final-lf
EOF
test_cmp expected actual.munged
'
test_done
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