We update file1 so drastically that it is more similar to file0, and
then remove file0. With -B, changes to file1 should be broken into
separate delete and create, resulting in removal of file0, removal of
-original file1 and creation of completely rewritten file1.
+original file1 and creation of completely rewritten file1. The latter
+two are then merged back into a single "complete rewrite".
Further, with -B and -M together, these three modifications should
turn into rename-edit of file0 into file1.
Starting from the same two files in the tree, we swap file0 and file1.
-With -B, this should be detected as two complete rewrites, resulting in
-four changes in total.
+With -B, this should be detected as two complete rewrites.
Further, with -B and -M together, these should turn into two renames.
'
. ./test-lib.sh
. "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
-test_expect_success \
- setup \
- 'cat "$TEST_DIRECTORY"/../README >file0 &&
- cat "$TEST_DIRECTORY"/../COPYING >file1 &&
- git update-index --add file0 file1 &&
- tree=$(git write-tree) &&
- echo "$tree"'
-
-test_expect_success \
- 'change file1 with copy-edit of file0 and remove file0' \
- 'sed -e "s/git/GIT/" file0 >file1 &&
- rm -f file0 &&
- git update-index --remove file0 file1'
-
-test_expect_success \
- 'run diff with -B' \
- 'git diff-index -B --cached "$tree" >current'
-
-cat >expected <<\EOF
-:100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 11e331465a89c394dc25c780de230043750c1ec8 M100 file1
-EOF
-
-test_expect_success \
- 'validate result of -B (#1)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'run diff with -B and -M' \
- 'git diff-index -B -M "$tree" >current'
-
-cat >expected <<\EOF
-:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c R100 file0 file1
-EOF
-
-test_expect_success \
- 'validate result of -B -M (#2)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'swap file0 and file1' \
- 'rm -f file0 file1 &&
- git read-tree -m $tree &&
- git checkout-index -f -u -a &&
- mv file0 tmp &&
- mv file1 file0 &&
- mv tmp file1 &&
- git update-index file0 file1'
-
-test_expect_success \
- 'run diff with -B' \
- 'git diff-index -B "$tree" >current'
-
-cat >expected <<\EOF
-:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M100 file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100 file1
-EOF
-
-test_expect_success \
- 'validate result of -B (#3)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'run diff with -B and -M' \
- 'git diff-index -B -M "$tree" >current'
-
-cat >expected <<\EOF
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 R100 file1 file0
-:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 R100 file0 file1
-EOF
-
-test_expect_success \
- 'validate result of -B -M (#4)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'make file0 into something completely different' \
- 'rm -f file0 &&
- test_ln_s_add frotz file0 &&
- git update-index file1'
-
-test_expect_success \
- 'run diff with -B' \
- 'git diff-index -B "$tree" >current'
-
-cat >expected <<\EOF
-:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100 file1
-EOF
-
-test_expect_success \
- 'validate result of -B (#5)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'run diff with -B -M' \
- 'git diff-index -B -M "$tree" >current'
-
-# file0 changed from regular to symlink. file1 is very close to the preimage of file0.
-# the change does not make file0 disappear, so file1 is denoted as a copy of file0
-cat >expected <<\EOF
-:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 C file0 file1
-EOF
-
-test_expect_success \
- 'validate result of -B -M (#6)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'run diff with -M' \
- 'git diff-index -M "$tree" >current'
-
-# This should not mistake file0 as the copy source of new file1
-# due to type differences.
-cat >expected <<\EOF
-:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M file1
-EOF
-
-test_expect_success \
- 'validate result of -M (#7)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'file1 edited to look like file0 and file0 rename-edited to file2' \
- 'rm -f file0 file1 &&
- git read-tree -m $tree &&
- git checkout-index -f -u -a &&
- sed -e "s/git/GIT/" file0 >file1 &&
- sed -e "s/git/GET/" file0 >file2 &&
- rm -f file0 &&
- git update-index --add --remove file0 file1 file2'
-
-test_expect_success \
- 'run diff with -B' \
- 'git diff-index -B "$tree" >current'
-
-cat >expected <<\EOF
-:100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D file0
-:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 08bb2fb671deff4c03a4d4a0a1315dff98d5732c M100 file1
-:000000 100644 0000000000000000000000000000000000000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 A file2
-EOF
-
-test_expect_success \
- 'validate result of -B (#8)' \
- 'compare_diff_raw expected current'
-
-test_expect_success \
- 'run diff with -B -C' \
- 'git diff-index -B -C "$tree" >current'
-
-cat >expected <<\EOF
-:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c C095 file0 file1
-:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 59f832e5c8b3f7e486be15ad0cd3e95ba9af8998 R095 file0 file2
-EOF
-
-test_expect_success \
- 'validate result of -B -M (#9)' \
- 'compare_diff_raw expected current'
+test_expect_success setup '
+ cat "$TEST_DIRECTORY"/diff-lib/README >file0 &&
+ cat "$TEST_DIRECTORY"/diff-lib/COPYING >file1 &&
+ git update-index --add file0 file1 &&
+ git tag reference $(git write-tree)
+'
+
+test_expect_success 'change file1 with copy-edit of file0 and remove file0' '
+ sed -e "s/git/GIT/" file0 >file1 &&
+ rm -f file0 &&
+ git update-index --remove file0 file1
+'
+
+test_expect_success 'run diff with -B (#1)' '
+ git diff-index -B --cached reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 000000 548142c327a6790ff8821d67c2ee1eff7a656b52 0000000000000000000000000000000000000000 D file0
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec M100 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'run diff with -B and -M (#2)' '
+ git diff-index -B -M reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec R100 file0 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'swap file0 and file1' '
+ rm -f file0 file1 &&
+ git read-tree -m reference &&
+ git checkout-index -f -u -a &&
+ mv file0 tmp &&
+ mv file1 file0 &&
+ mv tmp file1 &&
+ git update-index file0 file1
+'
+
+test_expect_success 'run diff with -B (#3)' '
+ git diff-index -B reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M100 file0
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M100 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'run diff with -B and -M (#4)' '
+ git diff-index -B -M reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 R100 file1 file0
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 548142c327a6790ff8821d67c2ee1eff7a656b52 R100 file0 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'make file0 into something completely different' '
+ rm -f file0 &&
+ test_ln_s_add frotz file0 &&
+ git update-index file1
+'
+
+test_expect_success 'run diff with -B (#5)' '
+ git diff-index -B reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T file0
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M100 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'run diff with -B -M (#6)' '
+ git diff-index -B -M reference >current &&
+
+ # file0 changed from regular to symlink. file1 is the same as the preimage
+ # of file0. Because the change does not make file0 disappear, file1 is
+ # denoted as a copy of file0
+ cat >expect <<-\EOF &&
+ :100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T file0
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 548142c327a6790ff8821d67c2ee1eff7a656b52 C file0 file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'run diff with -M (#7)' '
+ git diff-index -M reference >current &&
+
+ # This should not mistake file0 as the copy source of new file1
+ # due to type differences.
+ cat >expect <<-\EOF &&
+ :100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T file0
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M file1
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'file1 edited to look like file0 and file0 rename-edited to file2' '
+ rm -f file0 file1 &&
+ git read-tree -m reference &&
+ git checkout-index -f -u -a &&
+ sed -e "s/git/GIT/" file0 >file1 &&
+ sed -e "s/git/GET/" file0 >file2 &&
+ rm -f file0 &&
+ git update-index --add --remove file0 file1 file2
+'
+
+test_expect_success 'run diff with -B (#8)' '
+ git diff-index -B reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 000000 548142c327a6790ff8821d67c2ee1eff7a656b52 0000000000000000000000000000000000000000 D file0
+ :100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec M100 file1
+ :000000 100644 0000000000000000000000000000000000000000 69a939f651686f56322566e2fd76715947a24162 A file2
+ EOF
+ compare_diff_raw expect current
+'
+
+test_expect_success 'run diff with -B -C (#9)' '
+ git diff-index -B -C reference >current &&
+ cat >expect <<-\EOF &&
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec C095 file0 file1
+ :100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 69a939f651686f56322566e2fd76715947a24162 R095 file0 file2
+ EOF
+ compare_diff_raw expect current
+'
test_done