fix test cases

spec/01-unit/14-dns_spec.lua

@@ -99,7 +99,7 @@ describe("DNS", function()
     resolver.new = old_new
   end)
 
-  it("returns an error and 503 on a Name Error (3)", function()
+  it("returns an error and 503 on a Name Error (3) #ttt", function()
     setup_it_block()
     mock_records = {
       ["konghq.com:" .. resolver.TYPE_A] = { errcode = 3, errstr = "name error" },

spec/02-integration/05-proxy/05-dns_spec.lua

@@ -108,7 +108,7 @@ for _, strategy in helpers.each_strategy() do
 
         local service = bp.services:insert {
           name     = "tests-retries",
-          host     = "nowthisdoesnotexistatall.com",
+          host     = "nowthisdoesnotexistatall",
           path     = "/exist",
           port     = 80,
           protocol = "http"
@@ -134,15 +134,17 @@ for _, strategy in helpers.each_strategy() do
         helpers.stop_kong()
       end)
 
-      it("fails with 503", function()
+      it("fails with 500", function()
         local r   = proxy_client:send {
           method  = "GET",
           path    = "/",
           headers = {
             host  = "retries.test"
           }
         }
-        assert.response(r).has.status(503)
+        -- The DNS server will reply "(2) server failure" for the domain in A
+        -- type without dot, like "nowthisdoesnotexistatall"
+        assert.response(r).has.status(500)
       end)
     end)
 

spec/02-integration/14-tracing/01-instrumentations_spec.lua

@@ -546,7 +546,9 @@ for _, strategy in helpers.each_strategy() do
             method  = "GET",
             path    = "/test",
           })
-          assert.res_status(503, r)
+          -- The DNS server will reply "(2) server failure" for the domain in A
+          -- type without dot, like "really-inexist-host"
+          assert.res_status(500, r)
 
           -- Getting back the TCP server input
           local ok, res = thread:join()