Add Validators unit tests

modules/ripple_core/validator/ripple_Validator.h

@@ -14,7 +14,7 @@
 class Validator
 {
 public:
-    typedef RippleAddress PublicKey;
+    typedef uint256 PublicKey;
 
     explicit Validator (PublicKey const& publicKey);
 

modules/ripple_core/validator/ripple_Validators.cpp

@@ -218,3 +218,23 @@ Validators* Validators::New (Listener* listener)
 {
     return new ValidatorsImp (listener);
 }
+
+//------------------------------------------------------------------------------
+
+/** Produces validators for unit tests.
+*/
+class TestValidatorSource : public Validators::Source
+{
+public:
+    static Validator makeValidator (int publicKeyIndex)
+    {
+
+    }
+
+    ValidatorList::Ptr fetch ()
+    {
+        ValidatorList::Ptr list = new ValidatorList;
+
+        return list;
+    }
+};