Organize spec helper files

spec/helpers/equals_pointer.h

@@ -0,0 +1,38 @@
+#ifndef tree_sitter_equals_pointer_h
+#define tree_sitter_equals_pointer_h
+
+#include <string>
+
+namespace snowhouse {
+    using namespace std;
+    
+    template<typename ExpectedType>
+    struct EqualsPointerConstraint : Expression<EqualsPointerConstraint<ExpectedType>>
+    {
+        EqualsPointerConstraint(const ExpectedType& expected) : expected(expected) {}
+        
+        template<typename ActualType>
+        bool operator()(const ActualType& actual) const {
+            return *expected == *actual;
+        }
+        
+        ExpectedType expected;
+    };
+    
+    template<typename ExpectedType>
+    struct Stringizer<EqualsPointerConstraint<ExpectedType>>
+    {
+        static string ToString(const EqualsPointerConstraint<ExpectedType>& constraint) {
+            ostringstream builder;
+            builder << "pointer to " << snowhouse::Stringize(constraint.expected);
+            return builder.str();
+        }
+    };
+    
+    template<typename ExpectedType>
+    inline EqualsPointerConstraint<ExpectedType> EqualsPointer(const ExpectedType& expected) {
+        return EqualsPointerConstraint<ExpectedType>(expected);
+    }
+}
+
+#endif