tests: don't rely on parent dir being owned by self

Author: bycruz

tests/git2.test.lua

@@ -43,8 +43,9 @@ test.it("init bare creates a bare repo", function()
 end)
 
 test.it("open existing repo works", function()
-	local src = debug.getinfo(1, "S").source:sub(2):match("(.*[/\\])")
-	local repo = git2.open(src .. "..")
+	local dir = mkTmp("open")
+	mkCommit(dir, "open")
+	local repo = git2.open(dir)
 	test.truthy(repo:path())
 	test.equal(repo:isBare(), false)
 	repo:free()