Leave quoted exprs unchanged when evaluating captures

Author: stakx

src/Moq/Evaluator.cs

@@ -102,7 +102,7 @@ internal HashSet<Expression> Nominate(Expression expression)
 
 			public override Expression Visit(Expression expression)
 			{
-				if (expression != null)
+				if (expression != null && expression.NodeType != ExpressionType.Quote)
 				{
 					bool saveCannotBeEvaluated = this.cannotBeEvaluated;
 					this.cannotBeEvaluated = false;

src/Moq/ExpressionComparer.cs

@@ -18,6 +18,11 @@ private ExpressionComparer()
 		{
 		}
 
+		public bool EqualsAfterCapturesEvaluated(Expression x, Expression y)
+		{
+			return this.Equals(x?.Apply(EvaluateCaptures.Rewriter), y?.Apply(EvaluateCaptures.Rewriter));
+		}
+
 		public bool Equals(Expression x, Expression y)
 		{
 			if (object.ReferenceEquals(x, y))
@@ -30,19 +35,6 @@ public bool Equals(Expression x, Expression y)
 				return false;
 			}
 
-			// Before actually comparing two nodes, make sure that captures variables have been
-			// evaluated to their current values (as we don't want to compare their identities):
-
-			if (x is MemberExpression)
-			{
-				x = x.Apply(EvaluateCaptures.Rewriter);
-			}
-
-			if (y is MemberExpression)
-			{
-				y = y.Apply(EvaluateCaptures.Rewriter);
-			}
-
 			if (x.NodeType == y.NodeType)
 			{
 				switch (x.NodeType)

src/Moq/ExpressionExtensions.cs

@@ -448,6 +448,7 @@ private static bool PartialMatcherAwareEval_ShouldEvaluate(Expression expression
 #pragma warning disable 618
 			return expression.NodeType switch
 			{
+				ExpressionType.Quote        => false,
 				ExpressionType.Parameter    => false,
 				ExpressionType.Extension    => !(expression is MatchExpression),
 				ExpressionType.Call         => !((MethodCallExpression)expression).Method.IsDefined(typeof(MatcherAttribute), true)

src/Moq/Expressions/Visitors/EvaluateCaptures.cs

@@ -31,5 +31,10 @@ protected override Expression VisitMember(MemberExpression node)
 				return base.VisitMember(node);
 			}
 		}
+
+		protected override Expression VisitUnary(UnaryExpression node)
+		{
+			return node.NodeType == ExpressionType.Quote ? node : base.VisitUnary(node);
+		}
 	}
 }

src/Moq/Match.cs

@@ -217,7 +217,7 @@ public bool Equals(Match<T> other)
 			}
 			else if (!(this.RenderExpression is MethodCallExpression ce && ce.Method.DeclaringType == typeof(Match)))
 			{
-				return ExpressionComparer.Default.Equals(this.RenderExpression, other.RenderExpression);
+				return ExpressionComparer.Default.EqualsAfterCapturesEvaluated(this.RenderExpression, other.RenderExpression);
 			}
 			else
 			{

src/Moq/Matchers/ExpressionMatcher.cs

@@ -19,7 +19,7 @@ public ExpressionMatcher(Expression expression)
 		public bool Matches(object argument, Type parameterType)
 		{
 			return argument is Expression valueExpression
-				&& ExpressionComparer.Default.Equals(this.expression, valueExpression);
+				&& ExpressionComparer.Default.EqualsAfterCapturesEvaluated(this.expression, valueExpression);
 		}
 
 		public void SetupEvaluatedSuccessfully(object argument, Type parameterType)

src/Moq/MethodExpectation.cs

@@ -240,7 +240,7 @@ public override bool Equals(Expectation obj)
 					{
 						for (int j = 0, nj = e1.Expressions.Count; j < nj; ++j)
 						{
-							if (!ExpressionComparer.Default.Equals(e1.Expressions[j], e2.Expressions[j]))
+							if (!ExpressionComparer.Default.EqualsAfterCapturesEvaluated(e1.Expressions[j], e2.Expressions[j]))
 							{
 								return false;
 							}
@@ -250,7 +250,7 @@ public override bool Equals(Expectation obj)
 					}
 				}
 
-				if (!ExpressionComparer.Default.Equals(this.partiallyEvaluatedArguments[i], other.partiallyEvaluatedArguments[i]))
+				if (!ExpressionComparer.Default.EqualsAfterCapturesEvaluated(this.partiallyEvaluatedArguments[i], other.partiallyEvaluatedArguments[i]))
 				{
 					return false;
 				}

src/Moq/StubbedPropertiesSetup.cs

@@ -90,7 +90,7 @@ public PropertyAccessorExpectation(Mock mock)
 
 			public override bool Equals(Expectation other)
 			{
-				return other is PropertyAccessorExpectation pae && ExpressionComparer.Default.Equals(this.expression, pae.expression);
+				return other is PropertyAccessorExpectation pae && ExpressionComparer.Default.EqualsAfterCapturesEvaluated(this.expression, pae.expression);
 			}
 
 			public override int GetHashCode()