using Upsilon.Evaluator;
using Xunit;

namespace UpsilonTests
{
    public class StringTests
    {
        [Fact]
        public void BasicStringVariable()
        {
            const string input = @"
string = ""test""
return string
";
            var script = new Script(input);
            Assert.Empty(script.Diagnostics.Messages);
            var evaluated = script.Evaluate<string>();
            Assert.Empty(script.Diagnostics.Messages);
            Assert.Equal("test", evaluated);
        }

        [Fact]
        public void StringIndexable()
        {
            const string input = @"
string = ""test""
return string[3]
";
            var script = new Script(input);
            Assert.Empty(script.Diagnostics.Messages);
            var evaluated = script.Evaluate<string>();
            Assert.Empty(script.Diagnostics.Messages);
            Assert.Equal("s", evaluated);
        }

        [Fact]
        public void StringAddition()
        {
            const string input = @"
string = ""test"" + ""123""
return string
";
            var script = new Script(input);
            Assert.Empty(script.Diagnostics.Messages);
            var evaluated = script.Evaluate<string>();
            Assert.Empty(script.Diagnostics.Messages);
            Assert.Equal("test123", evaluated);
        }

    }
}