diff options
Diffstat (limited to 't/t4008-diff-break-rewrite.sh')
| -rwxr-xr-x | t/t4008-diff-break-rewrite.sh | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/t/t4008-diff-break-rewrite.sh b/t/t4008-diff-break-rewrite.sh new file mode 100755 index 000000000000..b1ccd4102e09 --- /dev/null +++ b/t/t4008-diff-break-rewrite.sh @@ -0,0 +1,159 @@ +#!/bin/sh +# +# Copyright (c) 2005 Junio C Hamano +# + +test_description='Break and then rename + +We have two very different files, file0 and file1, registered in a tree. + +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. 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. + +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"/diff-lib/README >file0 && + cat "$TEST_DIRECTORY"/diff-lib/COPYING >file1 && + blob0_id=$(git hash-object file0) && + blob1_id=$(git hash-object file1) && + git update-index --add file0 file1 && + git tag reference $(git write-tree) +' + +test_expect_success 'change file1 with copy-edit of file0 and remove file0' ' + sed -e "s/git/GIT/" file0 >file1 && + blob2_id=$(git hash-object 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 $blob0_id $ZERO_OID D file0 + :100644 100644 $blob1_id $blob2_id 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 $blob0_id $blob2_id 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 $blob0_id $blob1_id M100 file0 + :100644 100644 $blob1_id $blob0_id 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 $blob1_id $blob1_id R100 file1 file0 + :100644 100644 $blob0_id $blob0_id R100 file0 file1 + EOF + compare_diff_raw expect current +' + +test_expect_success 'make file0 into something completely different' ' + rm -f file0 && + test_ln_s_add frotz file0 && + slink_id=$(printf frotz | git hash-object --stdin) && + git update-index file1 +' + +test_expect_success 'run diff with -B (#5)' ' + git diff-index -B reference >current && + cat >expect <<-EOF && + :100644 120000 $blob0_id $slink_id T file0 + :100644 100644 $blob1_id $blob0_id 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 $blob0_id $slink_id T file0 + :100644 100644 $blob0_id $blob0_id 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 $blob0_id $slink_id T file0 + :100644 100644 $blob1_id $blob0_id M file1 + EOF + compare_diff_raw expect current +' + +test_expect_success 'file1 edited to look like file0 and file0 rename-edited to file2' ' + rm -f file0 file1 && + git read-tree -m reference && + git checkout-index -f -u -a && + sed -e "s/git/GIT/" file0 >file1 && + sed -e "s/git/GET/" file0 >file2 && + blob3_id=$(git hash-object 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 $blob0_id $ZERO_OID D file0 + :100644 100644 $blob1_id $blob2_id M100 file1 + :000000 100644 $ZERO_OID $blob3_id 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 $blob0_id $blob2_id C095 file0 file1 + :100644 100644 $blob0_id $blob3_id R095 file0 file2 + EOF + compare_diff_raw expect current +' + +test_done |