diff options
Diffstat (limited to 't/t4051-diff-function-context.sh')
| -rwxr-xr-x | t/t4051-diff-function-context.sh | 263 |
1 files changed, 189 insertions, 74 deletions
diff --git a/t/t4051-diff-function-context.sh b/t/t4051-diff-function-context.sh index 001d678e09..6154acb456 100755 --- a/t/t4051-diff-function-context.sh +++ b/t/t4051-diff-function-context.sh @@ -3,90 +3,205 @@ test_description='diff function context' . ./test-lib.sh -. "$TEST_DIRECTORY"/diff-lib.sh +dir="$TEST_DIRECTORY/t4051" -cat <<\EOF >hello.c -#include <stdio.h> - -static int a(void) -{ - /* - * Dummy. - */ +commit_and_tag () { + tag=$1 && + shift && + git add "$@" && + test_tick && + git commit -m "$tag" && + git tag "$tag" } -static int hello_world(void) -{ - /* Classic. */ - printf("Hello world.\n"); - - /* Success! */ - return 0; +first_context_line () { + awk ' + found {print; exit} + /^@@/ {found = 1} + ' } -static int b(void) -{ - /* - * Dummy, too. - */ + +last_context_line () { + sed -ne \$p } -int main(int argc, char **argv) -{ - a(); - b(); - return hello_world(); +check_diff () { + name=$1 + desc=$2 + options="-W $3" + + test_expect_success "$desc" ' + git diff $options "$name^" "$name" >"$name.diff" + ' + + test_expect_success ' diff applies' ' + test_when_finished "git reset --hard" && + git checkout --detach "$name^" && + git apply --index "$name.diff" && + git diff --exit-code "$name" + ' } -EOF test_expect_success 'setup' ' - git add hello.c && - test_tick && - git commit -m initial && - - grep -v Classic <hello.c >hello.c.new && - mv hello.c.new hello.c -' - -cat <<\EOF >expected -diff --git a/hello.c b/hello.c ---- a/hello.c -+++ b/hello.c -@@ -10,8 +10,7 @@ static int a(void) - static int hello_world(void) - { -- /* Classic. */ - printf("Hello world.\n"); - - /* Success! */ - return 0; - } -EOF - -test_expect_success 'diff -U0 -W' ' - git diff -U0 -W >actual && - compare_diff_patch actual expected -' - -cat <<\EOF >expected -diff --git a/hello.c b/hello.c ---- a/hello.c -+++ b/hello.c -@@ -9,9 +9,8 @@ static int a(void) - - static int hello_world(void) - { -- /* Classic. */ - printf("Hello world.\n"); - - /* Success! */ - return 0; - } -EOF - -test_expect_success 'diff -W' ' - git diff -W >actual && - compare_diff_patch actual expected + cat "$dir/includes.c" "$dir/dummy.c" "$dir/dummy.c" "$dir/hello.c" \ + "$dir/dummy.c" "$dir/dummy.c" >file.c && + commit_and_tag initial file.c && + + grep -v "delete me from hello" <file.c >file.c.new && + mv file.c.new file.c && + commit_and_tag changed_hello file.c && + + grep -v "delete me from includes" <file.c >file.c.new && + mv file.c.new file.c && + commit_and_tag changed_includes file.c && + + cat "$dir/appended1.c" >>file.c && + commit_and_tag appended file.c && + + cat "$dir/appended2.c" >>file.c && + commit_and_tag extended file.c && + + grep -v "Begin of second part" <file.c >file.c.new && + mv file.c.new file.c && + commit_and_tag long_common_tail file.c && + + git checkout initial && + cat "$dir/hello.c" "$dir/dummy.c" >file.c && + commit_and_tag hello_dummy file.c && + + # overlap function context of 1st change and -u context of 2nd change + grep -v "delete me from hello" <"$dir/hello.c" >file.c && + sed 2p <"$dir/dummy.c" >>file.c && + commit_and_tag changed_hello_dummy file.c && + + git checkout initial && + grep -v "delete me from hello" <file.c >file.c.new && + mv file.c.new file.c && + cat "$dir/appended1.c" >>file.c && + commit_and_tag changed_hello_appended file.c +' + +check_diff changed_hello 'changed function' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of hello" changed_hello.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End of hello" changed_hello.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" changed_hello.diff) -le 1 +' + +test_expect_success ' context does not include preceding empty lines' ' + test "$(first_context_line <changed_hello.diff)" != " " +' + +test_expect_success ' context does not include trailing empty lines' ' + test "$(last_context_line <changed_hello.diff)" != " " +' + +check_diff changed_includes 'changed includes' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin.h" changed_includes.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End.h" changed_includes.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" changed_includes.diff) -le 1 +' + +test_expect_success ' context does not include trailing empty lines' ' + test "$(last_context_line <changed_includes.diff)" != " " +' + +check_diff appended 'appended function' + +test_expect_success ' context includes begin' ' + grep "^[+].*Begin of first part" appended.diff +' + +test_expect_success ' context includes end' ' + grep "^[+].*End of first part" appended.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" appended.diff) -le 1 +' + +check_diff extended 'appended function part' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of first part" extended.diff +' + +test_expect_success ' context includes end' ' + grep "^[+].*End of second part" extended.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" extended.diff) -le 2 +' + +test_expect_success ' context does not include preceding empty lines' ' + test "$(first_context_line <extended.diff)" != " " +' + +check_diff long_common_tail 'change with long common tail and no context' -U0 + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of first part" long_common_tail.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End of second part" long_common_tail.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" long_common_tail.diff) -le 2 +' + +test_expect_success ' context does not include preceding empty lines' ' + test "$(first_context_line <long_common_tail.diff.diff)" != " " +' + +check_diff changed_hello_appended 'changed function plus appended function' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of hello" changed_hello_appended.diff && + grep "^[+].*Begin of first part" changed_hello_appended.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End of hello" changed_hello_appended.diff && + grep "^[+].*End of first part" changed_hello_appended.diff +' + +test_expect_success ' context does not include other functions' ' + test $(grep -c "^[ +-].*Begin" changed_hello_appended.diff) -le 2 +' + +check_diff changed_hello_dummy 'changed two consecutive functions' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of hello" changed_hello_dummy.diff && + grep "^ .*Begin of dummy" changed_hello_dummy.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End of hello" changed_hello_dummy.diff && + grep "^ .*End of dummy" changed_hello_dummy.diff +' + +test_expect_success ' overlapping hunks are merged' ' + test $(grep -c "^@@" changed_hello_dummy.diff) -eq 1 ' test_done |