codec: test: move some types from values_test.go into values_flex_test.go

This is better as values_flex_test.go is the file containing
things only used by codec, while values_test.go MUST be runnable
by different encoding libraries.

codec/values_flex_test.go

@@ -17,7 +17,44 @@ const teststrucflexChanCap = 64
 // that other engines may not support or may barf upon
 // e.g. custom extensions for wrapped types, maps with non-string keys, etc.
 
+// some funky types to test codecgen
+
+type codecgenA struct {
+	ZZ []byte
+}
+type codecgenB struct {
+	AA codecgenA
+}
+type codecgenC struct {
+	_struct struct{} `codec:",omitempty"`
+	BB      codecgenB
+}
+
+type TestCodecgenG struct {
+	TestCodecgenG int
+}
+type codecgenH struct {
+	TestCodecgenG
+}
+type codecgenI struct {
+	codecgenH
+}
+
+type codecgenK struct {
+	X int
+	Y string
+}
+type codecgenL struct {
+	X int
+	Y uint32
+}
+type codecgenM struct {
+	codecgenK
+	codecgenL
+}
+
 // Some unused types just stored here
+
 type Bbool bool
 type Aarray [1]string
 type Sstring string

codec/values_test.go

@@ -33,42 +33,6 @@ type wrapString string
 type wrapUint64Slice []wrapUint64
 type wrapStringSlice []wrapString
 
-// some funky types to stretch codecgen
-
-type codecgenA struct {
-	ZZ []byte
-}
-type codecgenB struct {
-	AA codecgenA
-}
-type codecgenC struct {
-	_struct struct{} `codec:",omitempty"`
-	BB      codecgenB
-}
-
-type TestCodecgenG struct {
-	TestCodecgenG int
-}
-type codecgenH struct {
-	TestCodecgenG
-}
-type codecgenI struct {
-	codecgenH
-}
-
-type codecgenK struct {
-	X int
-	Y string
-}
-type codecgenL struct {
-	X int
-	Y uint32
-}
-type codecgenM struct {
-	codecgenK
-	codecgenL
-}
-
 // some other types
 
 type stringUint64T struct {