describe("log module", function()
	before_each(function()
		local succ, log= pcall(require,"log")
		if succ then log.reset() end
	end)
	it("should load",function()
		require("log")
	end)
	it("should ingest a log",function()
		local log = require("log")
		log.log("test",nil,"blah")
	end)
	it("should return ingested logs from levels",function()
		local log = require("log")
		local ret = {}
		log.log("test",nil,"blah")
		log.of_level("blah",function(msg)
			table.insert(ret, msg)
		end)
		assert(#ret == 1)
		assert(ret[1].message == "test")
	end)
	it("should return ingested logs from tags", function()
		local log = require("log")
		local ret = {}
		log.info("one",{"one"})
		log.info("two",{"two"})
		log.info("one two",{"one","two"})
		log.of_tags({"one"},function(msg)
			table.insert(ret,msg)
		end)
		assert(#ret == 2)
		assert(ret[1].message == "one")
		assert(ret[2].message == "one two")
	end)
	it("should allow observers to see the message stream", function()
		local log = require("log")
		local ret = {}
		log.observe(function(chunk)
			if chunk.level == "panic" then
				table.insert(ret,chunk)
			end
		end)
		log.info("one")
		log.info("two")
		assert(#ret == 0)
		log.panic("three")
		assert(#ret == 1)
		log.info("four")
		assert(#ret == 1)
		assert(ret[1].message == "three")
	end)
end)