cleanup of merge leftover files from refactor/cli branch (Kong#1398)

spec/03-plugins/response-transformer/02-body_transformer_spec.lua

@@ -160,4 +160,88 @@ describe("Plugin: response-transformer", function()
       assert.falsy(body_transformer.is_json_body("application/x-www-form-urlencoded"))
     end)
   end)
+
+  describe("leave body alone", function()
+    -- Related to issue https://github.com/Mashape/kong/issues/1207 
+    -- unit test to check body remains unaltered
+
+    local old_ngx, handler
+
+    setup(function()
+      old_ngx = ngx
+      _G.ngx = {       -- busted requires explicit _G to access the global environment
+        log = function() end,
+        header = {
+            ["content-type"] = "application/json",
+          },
+        arg = {},
+        ctx = {
+            buffer = "",
+          },
+      }
+      handler = require("kong.plugins.response-transformer.handler")
+      handler:new()
+    end)
+
+    teardown(function()
+      ngx = old_ngx
+    end)
+
+    it("body remains unaltered if no transforms have been set", function()
+      -- only a header transform, no body changes
+      local conf = {
+        remove = {
+          headers = {"h1", "h2", "h3"},
+          json = {}
+        },
+        add = {
+          headers = {},
+          json = {},
+        },
+        append = {
+          headers = {},
+          json = {},
+        },
+        replace = {
+          headers = {},
+          json = {},
+        },
+      }
+      local body = [[
+
+    {
+      "id": 1,
+      "name": "Some One",
+      "username": "Bretchen",
+      "email": "[email protected]",
+      "address": {
+        "street": "Down Town street",
+        "suite": "Apt. 23",
+        "city": "Gwendoline"
+      },
+      "phone": "1-783-729-8531 x56442",
+      "website": "hardwork.org",
+      "company": {
+        "name": "BestBuy",
+        "catchPhrase": "just a bunch of words",
+        "bs": "bullshit words"
+      }
+    }
+
+  ]]
+
+      ngx.arg[1] = body
+      handler:body_filter(conf)
+      local result = ngx.arg[1]
+      ngx.arg[1] = ""
+      ngx.arg[2] = true -- end of body marker
+      handler:body_filter(conf)
+      result = result .. ngx.arg[1]
+
+      -- body filter should not execute, it would parse and re-encode the json, removing
+      -- the whitespace. So check equality to make sure whitespace is still there, and hence
+      -- body was not touched.
+      assert.are.same(body, result)
+    end)
+  end)
 end)