using Upsilon.BaseTypes.Number;
using Upsilon.Evaluator;
using Xunit;

namespace UpsilonTests
{
    public class ScopeTests
    {
        [Fact]
        public void LocalInnerScopeDoesNotOverrideGlobal()
        {
            const string input = @"
a = 10
if true then
    local a = 100
end
";
            var script = new Script(input);
            Assert.Empty(script.Diagnostics.Messages);
            script.Evaluate();
            Assert.Empty(script.Diagnostics.Messages);
            Assert.True(script.Scope.TryGet("a", out var obj));
            Assert.Equal((long)10, (NumberLong)obj);
        }

        [Fact]
        public void InnerScopeDoesOverrideGlobal()
        {
            const string input = @"
a = 10
if true then
    a = 100
end
b = a
";
            var script = new Script(input);
            Assert.Empty(script.Diagnostics.Messages);
            script.Evaluate();
            Assert.Empty(script.Diagnostics.Messages);
            Assert.True(script.Scope.TryGet("a", out var obj));
            Assert.Equal((long)100, (NumberLong)obj);
        }

    }
}