protected void AssertExpressionValue <T>(string code, T expected)
{
ExprNode expr = this.AssertExpression(code);
Assert.That(ConstantExpressionEvaluator.TryEvaluateAs(expr, out T result));
Assert.That(result, Is.Not.Null);
Assert.That(result, Is.EqualTo(expected).Within(1e-10));
}
protected void AssertEvaluationException(string code)
{
ExprNode expr = this.AssertExpression(code);
Assert.That(() => ConstantExpressionEvaluator.TryEvaluateAs(expr, out object result), Throws.InstanceOf <EvaluationException>());
}
