filter-repo: add various --path-rename tests

Signed-off-by: Elijah Newren <newren@gmail.com>

t/t9390-filter-repo.sh

@@ -43,4 +43,101 @@ filter_testcase degenerate degenerate-keepme   --path moduleA/keepme
 filter_testcase degenerate degenerate-moduleA  --path moduleA
 filter_testcase degenerate degenerate-globme   --path-glob *me
 
+test_expect_success 'setup path_rename' '
+	test_create_repo path_rename &&
+	(
+		cd path_rename &&
+		mkdir sequences values &&
+		test_seq 1 10 >sequences/tiny &&
+		test_seq 100 110 >sequences/intermediate &&
+		test_seq 1000 1010 >sequences/large &&
+		test_seq 1000 1010 >values/large &&
+		test_seq 10000 10010 >values/huge &&
+		git add sequences values &&
+		git commit -m initial &&
+
+		git mv sequences/tiny sequences/small &&
+		cp sequences/intermediate sequences/medium &&
+		echo 10011 >values/huge &&
+		git add sequences values &&
+		git commit -m updates &&
+
+		git rm sequences/intermediate &&
+		echo 11 >sequences/small &&
+		git add sequences/small &&
+		git commit -m changes &&
+
+		echo 1011 >sequences/medium &&
+		git add sequences/medium &&
+		git commit -m final
+	)
+'
+
+test_expect_success '--path-rename sequences/tiny:sequences/small' '
+	(
+		git clone file://"$(pwd)"/path_rename path_rename_single &&
+		cd path_rename_single &&
+		git filter-repo --path-rename sequences/tiny:sequences/small &&
+		git log --format=%n --name-only | sort | uniq >filenames &&
+		test_line_count = 7 filenames &&
+		! grep sequences/tiny filenames &&
+		git rev-parse HEAD~3:sequences/small
+	)
+'
+
+test_expect_success '--path-rename sequences:numbers' '
+	(
+		git clone file://"$(pwd)"/path_rename path_rename_dir &&
+		cd path_rename_dir &&
+		git filter-repo --path-rename sequences:numbers &&
+		git log --format=%n --name-only | sort | uniq >filenames &&
+		test_line_count = 8 filenames &&
+		! grep sequences/ filenames &&
+		grep numbers/ filenames &&
+		grep values/ filenames
+	)
+'
+
+test_expect_success '--path-rename-prefix values:numbers' '
+	(
+		git clone file://"$(pwd)"/path_rename path_rename_dir_2 &&
+		cd path_rename_dir_2 &&
+		git filter-repo --path-rename values/:numbers/ &&
+		git log --format=%n --name-only | sort | uniq >filenames &&
+		test_line_count = 8 filenames &&
+		! grep values/ filenames &&
+		grep sequences/ filenames &&
+		grep numbers/ filenames
+	)
+'
+
+test_expect_success '--path-rename squashing' '
+	(
+		git clone file://"$(pwd)"/path_rename path_rename_squash &&
+		cd path_rename_squash &&
+		git filter-repo \
+			--path-rename sequences/tiny:sequences/small \
+			--path-rename sequences:numbers \
+			--path-rename values:numbers \
+			--path-rename numbers/intermediate:numbers/medium &&
+		git log --format=%n --name-only | sort | uniq >filenames &&
+		# Just small, medium, large, huge, and a blank line...
+		test_line_count = 5 filenames &&
+		! grep sequences/ filenames &&
+		! grep values/ filenames &&
+		grep numbers/ filenames
+	)
+'
+
+test_expect_success '--path-rename inability to squash' '
+	(
+		git clone file://"$(pwd)"/path_rename path_rename_bad_squash &&
+		cd path_rename_bad_squash &&
+		test_must_fail git filter-repo \
+			--path-rename values/large:values/big \
+			--path-rename values/huge:values/big 2>../err &&
+		test_i18ngrep "File renaming caused colliding pathnames" ../err
+	)
+'
+
 test_done