[PATCH v3 1/2] rev-parse tests: add tests executed from a subdirectory

[Michael Rappazzo <rappazzo@gmail.com>]

t1500-rev-parse contains envrionment leaks (changing dir without
changing back, setting config variables, etc).  Add a test to clean this
up up so that future tests can be added without worry of any setting
from a previous test.

t2027-worktree-list has an incorrect expectation for --git-common-dir
which has been adjusted and marked to expect failure.

Some of the tests added have been marked to expect failure.  These
demonstrate a problem with the way that some options to git rev-parse
behave when executed from a subdirectory of the main worktree.

Signed-off-by: Michael Rappazzo <rappazzo@gmail.com>
---
 t/t1500-rev-parse.sh     | 38 ++++++++++++++++++++++++++++++++++++++
 t/t1700-split-index.sh   | 17 +++++++++++++++++
 t/t2027-worktree-list.sh | 12 ++++++++++--
 3 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/t/t1500-rev-parse.sh b/t/t1500-rev-parse.sh
index 48ee077..442ca46 100755
--- a/t/t1500-rev-parse.sh
+++ b/t/t1500-rev-parse.sh
@@ -36,6 +36,7 @@ test_rev_parse() {
 # label is-bare is-inside-git is-inside-work prefix git-dir
 
 ROOT=$(pwd)
+original_core_bare=$(git config core.bare)
 
 test_rev_parse toplevel false false true '' .git
 
@@ -84,4 +85,41 @@ test_rev_parse 'GIT_DIR=../repo.git, core.bare = true' true false false ''
 git config --unset core.bare
 test_rev_parse 'GIT_DIR=../repo.git, core.bare undefined' false false true ''
 
+test_expect_success 'cleanup from the previous tests' '
+	cd .. &&
+	rm -r work &&
+	mv repo.git .git &&
+	unset GIT_DIR &&
+	unset GIT_CONFIG &&
+	git config core.bare $original_core_bare
+'
+
+test_expect_success 'git-common-dir from worktree root' '
+	echo .git >expect &&
+	git rev-parse --git-common-dir >actual &&
+	test_cmp expect actual
+'
+
+test_expect_failure 'git-common-dir inside sub-dir' '
+	mkdir -p path/to/child &&
+	test_when_finished "rm -rf path" &&
+	echo "$(git -C path/to/child rev-parse --show-cdup).git" >expect &&
+	git -C path/to/child rev-parse --git-common-dir >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'git-path from worktree root' '
+	echo .git/objects >expect &&
+	git rev-parse --git-path objects >actual &&
+	test_cmp expect actual
+'
+
+test_expect_failure 'git-path inside sub-dir' '
+	mkdir -p path/to/child &&
+	test_when_finished "rm -rf path" &&
+	echo "$(git -C path/to/child rev-parse --show-cdup).git/objects" >expect &&
+	git -C path/to/child rev-parse --git-path objects >actual &&
+	test_cmp expect actual
+'
+
 test_done
diff --git a/t/t1700-split-index.sh b/t/t1700-split-index.sh
index 8aef49f..8ca21bd 100755
--- a/t/t1700-split-index.sh
+++ b/t/t1700-split-index.sh
@@ -200,4 +200,21 @@ EOF
 	test_cmp expect actual
 '
 
+test_expect_failure 'rev-parse --shared-index-path' '
+	rm -rf .git &&
+	test_create_repo . &&
+	git update-index --split-index &&
+	ls -t .git/sharedindex* | tail -n 1 >expect &&
+	git rev-parse --shared-index-path >actual &&
+	test_cmp expect actual &&
+	mkdir work &&
+	test_when_finished "rm -rf work" &&
+	(
+		cd work &&
+		ls -t ../.git/sharedindex* | tail -n 1 >expect &&
+		git rev-parse --shared-index-path >actual &&
+		test_cmp expect actual
+	)
+'
+
 test_done
diff --git a/t/t2027-worktree-list.sh b/t/t2027-worktree-list.sh
index 1b1b65a..53cc5d3 100755
--- a/t/t2027-worktree-list.sh
+++ b/t/t2027-worktree-list.sh
@@ -8,16 +8,24 @@ test_expect_success 'setup' '
 	test_commit init
 '
 
-test_expect_success 'rev-parse --git-common-dir on main worktree' '
+test_expect_failure 'rev-parse --git-common-dir on main worktree' '
 	git rev-parse --git-common-dir >actual &&
 	echo .git >expected &&
 	test_cmp expected actual &&
 	mkdir sub &&
 	git -C sub rev-parse --git-common-dir >actual2 &&
-	echo sub/.git >expected2 &&
+	echo ../.git >expected2 &&
 	test_cmp expected2 actual2
 '
 
+test_expect_failure 'rev-parse --git-path objects linked worktree' '
+	echo "$(git rev-parse --show-toplevel)/.git/worktrees/linked-tree/objects" >expect &&
+	test_when_finished "rm -rf linked-tree && git worktree prune" &&
+	git worktree add --detach linked-tree master &&
+	git -C linked-tree rev-parse --git-path objects >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success '"list" all worktrees from main' '
 	echo "$(git rev-parse --show-toplevel) $(git rev-parse --short HEAD) [$(git symbolic-ref --short HEAD)]" >expect &&
 	test_when_finished "rm -rf here && git worktree prune" &&
-- 
2.8.0