Refactored AnimGraphResourceTests such that some tests use reusable fixtures.

src/AnimGraph/AnimGraphData.h

@@ -319,6 +319,13 @@ struct NodeDescriptorBase {
     return *socket->m_reference.ptr_ptr;
   }
 
+  template <typename T>
+  T GetInputValue(const char* name) const {
+    const Socket* socket = FindSocket(name, m_inputs);
+    assert(GetSocketType<T>() == socket->m_type);
+    return socket->GetValue<T>();
+  }
+
   template <typename T>
   void SetInput(const char* name, T* value_ptr) {
     Socket* socket = FindSocket(name, m_inputs);
@@ -423,6 +430,16 @@ struct NodeDescriptorBase {
     return nullptr;
   }
 
+  const Socket* FindSocket(const char* name, const std::vector<Socket>& sockets) const {
+    for (int i = 0, n = sockets.size(); i < n; i++) {
+      if (sockets[i].m_name == name) {
+        return &sockets[i];
+      }
+    }
+
+    return nullptr;
+  }
+
   int FindSocketIndex(const char* name, std::vector<Socket>& sockets) {
     for (int i = 0, n = sockets.size(); i < n; i++) {
       if (sockets[i].m_name == name) {