[PATCH v4 18/19] parallel-checkout: add tests related to .gitattributes

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Add tests to confirm that `struct conv_attrs` data is correctly passed
from the main process to the workers, and that they properly smudge
files before writing to the working tree. Also check that
non-parallel-eligible entries, such as regular files that require
external filters, are correctly smudge and written when
parallel-checkout is enabled.

Note: to avoid repeating code, some helper functions are extracted from
t0028 into a common lib file.

Original-patch-by: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
Signed-off-by: Jeff Hostetler <jeffhost@xxxxxxxxxxxxx>
Signed-off-by: Matheus Tavares <matheus.bernardino@xxxxxx>
---
 t/lib-encoding.sh                       |  25 ++++
 t/t0028-working-tree-encoding.sh        |  25 +---
 t/t2082-parallel-checkout-attributes.sh | 174 ++++++++++++++++++++++++
 3 files changed, 200 insertions(+), 24 deletions(-)
 create mode 100644 t/lib-encoding.sh
 create mode 100755 t/t2082-parallel-checkout-attributes.sh

diff --git a/t/lib-encoding.sh b/t/lib-encoding.sh
new file mode 100644
index 0000000000..c52ffbbed5
--- /dev/null
+++ b/t/lib-encoding.sh
@@ -0,0 +1,25 @@
+# Encoding helpers used by t0028 and t2082
+
+test_lazy_prereq NO_UTF16_BOM '
+	test $(printf abc | iconv -f UTF-8 -t UTF-16 | wc -c) = 6
+'
+
+test_lazy_prereq NO_UTF32_BOM '
+	test $(printf abc | iconv -f UTF-8 -t UTF-32 | wc -c) = 12
+'
+
+write_utf16 () {
+	if test_have_prereq NO_UTF16_BOM
+	then
+		printf '\376\377'
+	fi &&
+	iconv -f UTF-8 -t UTF-16
+}
+
+write_utf32 () {
+	if test_have_prereq NO_UTF32_BOM
+	then
+		printf '\0\0\376\377'
+	fi &&
+	iconv -f UTF-8 -t UTF-32
+}
diff --git a/t/t0028-working-tree-encoding.sh b/t/t0028-working-tree-encoding.sh
index bfc4fb9af5..4fffc3a639 100755
--- a/t/t0028-working-tree-encoding.sh
+++ b/t/t0028-working-tree-encoding.sh
@@ -3,33 +3,10 @@
 test_description='working-tree-encoding conversion via gitattributes'
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY/lib-encoding.sh"
 
 GIT_TRACE_WORKING_TREE_ENCODING=1 && export GIT_TRACE_WORKING_TREE_ENCODING
 
-test_lazy_prereq NO_UTF16_BOM '
-	test $(printf abc | iconv -f UTF-8 -t UTF-16 | wc -c) = 6
-'
-
-test_lazy_prereq NO_UTF32_BOM '
-	test $(printf abc | iconv -f UTF-8 -t UTF-32 | wc -c) = 12
-'
-
-write_utf16 () {
-	if test_have_prereq NO_UTF16_BOM
-	then
-		printf '\376\377'
-	fi &&
-	iconv -f UTF-8 -t UTF-16
-}
-
-write_utf32 () {
-	if test_have_prereq NO_UTF32_BOM
-	then
-		printf '\0\0\376\377'
-	fi &&
-	iconv -f UTF-8 -t UTF-32
-}
-
 test_expect_success 'setup test files' '
 	git config core.eol lf &&
 
diff --git a/t/t2082-parallel-checkout-attributes.sh b/t/t2082-parallel-checkout-attributes.sh
new file mode 100755
index 0000000000..6800574588
--- /dev/null
+++ b/t/t2082-parallel-checkout-attributes.sh
@@ -0,0 +1,174 @@
+#!/bin/sh
+
+test_description='parallel-checkout: attributes
+
+Verify that parallel-checkout correctly creates files that require
+conversions, as specified in .gitattributes. The main point here is
+to check that the conv_attr data is correctly sent to the workers
+and that it contains sufficient information to smudge files
+properly (without access to the index or attribute stack).
+'
+
+TEST_NO_CREATE_REPO=1
+. ./test-lib.sh
+. "$TEST_DIRECTORY/lib-parallel-checkout.sh"
+. "$TEST_DIRECTORY/lib-encoding.sh"
+
+test_expect_success 'parallel-checkout with ident' '
+	git init ident &&
+	(
+		cd ident &&
+		echo "A ident" >.gitattributes &&
+		echo "\$Id\$" >A &&
+		echo "\$Id\$" >B &&
+		git add -A &&
+		git commit -m id &&
+
+		rm A B &&
+		git_pc 2 0 2 reset --hard &&
+		hexsz=$(test_oid hexsz) &&
+		grep -E "\\\$Id: [0-9a-f]{$hexsz} \\\$" A &&
+		grep "\\\$Id\\\$" B
+	)
+'
+
+test_expect_success 'parallel-checkout with re-encoding' '
+	git init encoding &&
+	(
+		cd encoding &&
+		echo text >utf8-text &&
+		cat utf8-text | write_utf16 >utf16-text &&
+
+		echo "A working-tree-encoding=UTF-16" >.gitattributes &&
+		cp utf16-text A &&
+		cp utf16-text B &&
+		git add A B .gitattributes &&
+		git commit -m encoding &&
+
+		# Check that A (and only A) is stored in UTF-8
+		git cat-file -p :A >A.internal &&
+		test_cmp_bin utf8-text A.internal &&
+		git cat-file -p :B >B.internal &&
+		test_cmp_bin utf16-text B.internal &&
+
+		# Check that A is re-encoded during checkout
+		rm A B &&
+		git_pc 2 0 2 checkout A B &&
+		test_cmp_bin utf16-text A
+	)
+'
+
+test_expect_success 'parallel-checkout with eol conversions' '
+	git init eol &&
+	(
+		cd eol &&
+		git config core.autocrlf false &&
+		printf "multi\r\nline\r\ntext" >crlf-text &&
+		printf "multi\nline\ntext" >lf-text &&
+
+		echo "A text eol=crlf" >.gitattributes &&
+		echo "B -text" >>.gitattributes &&
+		cp crlf-text A &&
+		cp crlf-text B &&
+		git add A B .gitattributes &&
+		git commit -m eol &&
+
+		# Check that A (and only A) is stored with LF format
+		git cat-file -p :A >A.internal &&
+		test_cmp_bin lf-text A.internal &&
+		git cat-file -p :B >B.internal &&
+		test_cmp_bin crlf-text B.internal &&
+
+		# Check that A is converted to CRLF during checkout
+		rm A B &&
+		git_pc 2 0 2 checkout A B &&
+		test_cmp_bin crlf-text A
+	)
+'
+
+test_cmp_str()
+{
+	echo "$1" >tmp &&
+	test_cmp tmp "$2"
+}
+
+# Entries that require an external filter are not eligible for parallel
+# checkout. Check that both the parallel-eligible and non-eligible entries are
+# properly writen in a single checkout process.
+#
+test_expect_success 'parallel-checkout and external filter' '
+	git init filter &&
+	(
+		cd filter &&
+		git config filter.x2y.clean "tr x y" &&
+		git config filter.x2y.smudge "tr y x" &&
+		git config filter.x2y.required true &&
+
+		echo "A filter=x2y" >.gitattributes &&
+		echo x >A &&
+		echo x >B &&
+		echo x >C &&
+		git add -A &&
+		git commit -m filter &&
+
+		# Check that A (and only A) was cleaned
+		git cat-file -p :A >A.internal &&
+		test_cmp_str y A.internal &&
+		git cat-file -p :B >B.internal &&
+		test_cmp_str x B.internal &&
+		git cat-file -p :C >C.internal &&
+		test_cmp_str x C.internal &&
+
+		rm A B C *.internal &&
+		git_pc 2 0 2 checkout A B C &&
+		test_cmp_str x A &&
+		test_cmp_str x B &&
+		test_cmp_str x C
+	)
+'
+
+# The delayed queue is independent from the parallel queue, and they should be
+# able to work together in the same checkout process.
+#
+test_expect_success PERL 'parallel-checkout and delayed checkout' '
+	write_script rot13-filter.pl "$PERL_PATH" \
+		<"$TEST_DIRECTORY"/t0021/rot13-filter.pl &&
+	test_config_global filter.delay.process \
+		"\"$(pwd)/rot13-filter.pl\" \"$(pwd)/delayed.log\" clean smudge delay" &&
+	test_config_global filter.delay.required true &&
+
+	echo "a b c" >delay-content &&
+	echo "n o p" >delay-rot13-content &&
+
+	git init delayed &&
+	(
+		cd delayed &&
+		echo "*.a filter=delay" >.gitattributes &&
+		cp ../delay-content test-delay10.a &&
+		cp ../delay-content test-delay11.a &&
+		echo parallel >parallel1.b &&
+		echo parallel >parallel2.b &&
+		git add -A &&
+		git commit -m delayed &&
+
+		# Check that the stored data was cleaned
+		git cat-file -p :test-delay10.a > delay10.internal &&
+		test_cmp delay10.internal ../delay-rot13-content &&
+		git cat-file -p :test-delay11.a > delay11.internal &&
+		test_cmp delay11.internal ../delay-rot13-content &&
+		rm *.internal &&
+
+		rm *.a *.b
+	) &&
+
+	git_pc 2 0 2 -C delayed checkout -f &&
+	verify_checkout delayed &&
+
+	# Check that the *.a files got to the delay queue and were filtered
+	grep "smudge test-delay10.a .* \[DELAYED\]" delayed.log &&
+	grep "smudge test-delay11.a .* \[DELAYED\]" delayed.log &&
+	test_cmp delayed/test-delay10.a delay-content &&
+	test_cmp delayed/test-delay11.a delay-content
+'
+
+test_done
-- 
2.28.0




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