test_repo 15/sub/sub "$TRASH_DIRECTORY/15/.git" "$TRASH_DIRECTORY"
'
+#
+# case #16.1
+#
+############################################################
+#
+# Input:
+#
+# - GIT_WORK_TREE is not set
+# - GIT_DIR is not set
+# - core.worktree is not set
+# - .git is a directory
+# - cwd is inside .git
+#
+# Output:
+#
+# - no worktree
+# - cwd is unchanged
+# - prefix is NULL
+# - git_dir is set
+# - cwd can't be outside worktree
+
+test_expect_success '#16.1: setup' '
+ unset GIT_DIR GIT_WORK_TREE &&
+ mkdir 16 16/sub &&
+ cd 16 &&
+ git init &&
+ mkdir .git/wt .git/wt/sub &&
+ cd ..
+'
+
+test_expect_success '#16.1: at .git' '
+ cat >16/.git/expected <<EOF &&
+setup: git_dir: .
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git
+setup: prefix: (null)
+EOF
+ test_repo 16/.git
+'
+
+test_expect_success '#16.1: in .git/wt' '
+ cat >16/.git/wt/expected <<EOF &&
+setup: git_dir: $TRASH_DIRECTORY/16/.git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git/wt
+setup: prefix: (null)
+EOF
+ test_repo 16/.git/wt
+'
+
+test_expect_success '#16.1: in .git/wt/sub' '
+ cat >16/.git/wt/sub/expected <<EOF &&
+setup: git_dir: $TRASH_DIRECTORY/16/.git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git/wt/sub
+setup: prefix: (null)
+EOF
+ test_repo 16/.git/wt/sub
+'
+
+#
+# case #16.2
+#
+############################################################
+#
+# Input:
+#
+# - GIT_WORK_TREE is not set
+# - GIT_DIR is not set
+# - core.worktree is not set
+# - .git is a directory
+# - core.bare is set
+#
+# Output:
+#
+# - no worktree
+# - cwd is unchanged
+# - prefix is NULL
+# - git_dir is set
+# - cwd can't be outside worktree
+
+test_expect_success '#16.2: setup' '
+ git config --file="$TRASH_DIRECTORY/16/.git/config" core.bare true
+'
+
+test_expect_success '#16.2: at .git' '
+ cat >16/.git/expected <<EOF &&
+setup: git_dir: .
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git
+setup: prefix: (null)
+EOF
+ test_repo 16/.git
+'
+
+test_expect_success '#16.2: in .git/wt' '
+ cat >16/.git/wt/expected <<EOF &&
+setup: git_dir: $TRASH_DIRECTORY/16/.git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git/wt
+setup: prefix: (null)
+EOF
+ test_repo 16/.git/wt
+'
+
+test_expect_success '#16.2: in .git/wt/sub' '
+ cat >16/.git/wt/sub/expected <<EOF &&
+setup: git_dir: $TRASH_DIRECTORY/16/.git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/.git/wt/sub
+setup: prefix: (null)
+EOF
+ test_repo 16/.git/wt/sub
+'
+
+test_expect_success '#16.2: at root' '
+ cat >16/expected <<EOF &&
+setup: git_dir: .git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16
+setup: prefix: (null)
+EOF
+ test_repo 16
+'
+
+test_expect_failure '#16.2: in subdir' '
+ cat >16/sub/expected <<EOF &&
+setup: git_dir: $TRASH_DIRECTORY/16/.git
+setup: worktree: (null)
+setup: cwd: $TRASH_DIRECTORY/16/sub
+setup: prefix: (null)
+EOF
+ test_repo 16/sub
+'
+
test_done