public void Member_init_expressions_are_compared_correctly()
{
var expressionComparer = new ExpressionEqualityComparer();
var addMethod = typeof(List <string>).GetTypeInfo().GetDeclaredMethod("Add");
var bindingMessages = Expression.ListBind(
typeof(Node).GetProperty("Messages"),
Expression.ElementInit(addMethod, Expression.Constant("Constant1"))
);
var bindingDescriptions = Expression.ListBind(
typeof(Node).GetProperty("Descriptions"),
Expression.ElementInit(addMethod, Expression.Constant("Constant2"))
);
Expression e1 = Expression.MemberInit(
Expression.New(typeof(Node)),
new List <MemberBinding>
{
bindingMessages
}
);
Expression e2 = Expression.MemberInit(
Expression.New(typeof(Node)),
new List <MemberBinding>
{
bindingMessages,
bindingDescriptions
}
);
Assert.NotEqual(expressionComparer.GetHashCode(e1), expressionComparer.GetHashCode(e2));
Assert.False(expressionComparer.Equals(e1, e2));
Assert.Equal(expressionComparer.GetHashCode(e1), expressionComparer.GetHashCode(e1));
Assert.True(expressionComparer.Equals(e1, e1));
}