feat(schema): testing utilities (#20705)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

schema/testing/enum.go

@@ -0,0 +1,19 @@
+package schematesting
+
+import (
+	"pgregory.net/rapid"
+
+	"cosmossdk.io/schema"
+)
+
+var enumValuesGen = rapid.SliceOfNDistinct(NameGen, 1, 10, func(x string) string { return x })
+
+// EnumType generates random valid EnumTypes.
+var EnumType = rapid.Custom(func(t *rapid.T) schema.EnumType {
+	enum := schema.EnumType{
+		Name:   NameGen.Draw(t, "name"),
+		Values: enumValuesGen.Draw(t, "values"),
+	}
+
+	return enum
+})