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 IfStatNode AssertIfStatement(string src, object condValue, int thenStatementCount = 1, int?elseStatementCount = null)
{
IfStatNode node = this.GenerateAST(src).As <IfStatNode>();
Assert.That(node, Is.Not.Null);
this.AssertChildrenParentProperties(node);
Assert.That(ConstantExpressionEvaluator.Evaluate(node.Condition), Is.EqualTo(condValue));
Assert.That(node.ThenStat.Children, Has.Exactly(thenStatementCount).Items);
if (elseStatementCount is { })
protected void AssertLiteralSuffix(string code, string suffix, object value, Type type)
{
LitExprNode literal = this.GenerateAST(code).As <LitExprNode>();
Assert.That(literal, Is.Not.Null);
Assert.That(literal.Value?.GetType(), Is.EqualTo(type));
Assert.That(literal.Suffix, Is.EqualTo(suffix));
Assert.That(ConstantExpressionEvaluator.Evaluate(literal), Is.EqualTo(value).Within(1e-10));
}
protected void AssertEvaluationException(string code)
{
ExprNode expr = this.AssertExpression(code);
Assert.That(() => ConstantExpressionEvaluator.TryEvaluateAs(expr, out object result), Throws.InstanceOf <EvaluationException>());
}
