using Xunit;

using MathEngine.Tokenizer;

using static MathEngine.Tokenizer.Token;

namespace EngineTests.Tokeniser
{
    /// <summary>
    /// Class for testing the Token
    /// </summary>
    public class TokenTests
    {
        public static IEnumerable<object[]> TestConstructorCases
        {
            get
            {
                return new List<object[]> {
                new object[] { "123", Token.TokenType.Numeric, (uint)0 },
                new object[] { "+", Token.TokenType.Operator, (uint)0 },
                new object[] { "Sin", Token.TokenType.Function, (uint)1 }



            };
            }
        }


        /// <summary>
        /// Test that Token constructor returns valid token
        /// </summary>
        [Theory]
        [MemberData(nameof(TestConstructorCases))]
        public void TestTokenConstructorReturnsToken(string value, int type, uint arity = 0)
        {
            TokenType t_type = (TokenType)(type);
            Token token = new(value, t_type, arity);
            Assert.Equal(token.Value, value);
            Assert.Equal(token.Type, t_type);
            Assert.Equal(token.Arity, arity);
        }
    }
}