Revert "Revert "first attempt""

This reverts commit ae60d63204.

libs/LibStub/tests/test2.lua

@@ -0,0 +1,27 @@
+debugstack = debug.traceback
+strmatch = string.match
+
+loadfile("../LibStub.lua")()
+
+for major, library in LibStub:IterateLibraries() do
+	-- check that MyLib doesn't exist yet, by iterating through all the libraries
+	assert(major ~= "MyLib")
+end
+
+assert(not LibStub:GetLibrary("MyLib", true)) -- check that MyLib doesn't exist yet by direct checking
+assert(not pcall(LibStub.GetLibrary, LibStub, "MyLib")) -- don't silently fail, thus it should raise an error.
+local lib = LibStub:NewLibrary("MyLib", 1) -- create the lib
+assert(lib) -- check it exists
+assert(rawequal(LibStub:GetLibrary("MyLib"), lib)) -- verify that :GetLibrary("MyLib") properly equals the lib reference
+
+assert(LibStub:NewLibrary("MyLib", 2))	-- create a new version
+
+local count=0
+for major, library in LibStub:IterateLibraries() do
+	-- check that MyLib exists somewhere in the libraries, by iterating through all the libraries
+	if major == "MyLib" then -- we found it!
+		count = count +1
+		assert(rawequal(library, lib)) -- verify that the references are equal
+	end
+end
+assert(count == 1) -- verify that we actually found it, and only once