Tested each sample.

gem/t5.lua

@@ -0,0 +1,30 @@
+source = {}
+sink = {}
+pump = {}
+filter = {}
+
+-- source.chain
+dofile("ex6.lua")
+
+-- source.file
+dofile("ex5.lua")
+
+-- encode
+require"mime"
+encode = mime.encode
+
+-- sink.chain
+require"ltn12"
+sink.chain = ltn12.sink.chain
+
+-- wrap
+wrap = mime.wrap
+
+-- sink.file
+sink.file = ltn12.sink.file
+
+-- pump.all
+dofile("ex10.lua")
+
+-- run test
+dofile("ex11.lua")