using Xunit;

namespace EngineTests.Expression
{
    public class ExpressionTests
    {
        /// <summary>
        /// Test that Evaluate returns valid output
        /// </summary>
        [Fact]
        public void TestTokenizeBasicExpressionEvalutesToCorrectResult()
        {
            MathEngine.Expression.Expression test_expression = new("1+1");
            MathEngine.Expression.Expression expected_result = new("2");
            Assert.Equivalent(expected_result, test_expression.Evaluate(), true);
        }


        /// <summary>
        /// Test that Expression involing all basic operators returns valid reuslt
        /// </summary>
        [Fact]
        public void TestTokenizeBasicExpressionAllOperatorsEvalutesToCorrectResult()
        {
            MathEngine.Expression.Expression test_expression = new("1+1-2*3/4");
            MathEngine.Expression.Expression expected_result = new("0.5");
            Assert.Equivalent(expected_result, test_expression.Evaluate(), true);
        }
    }
}