sebastienros.jint/Jint.Tests/Runtime/UnicodeTests.cs

namespace Jint.Tests.Runtime
{
    public class UnicodeTests
    {
        private readonly Engine _engine;

        public UnicodeTests()
        {
            _engine = new Engine()
                    .SetValue("log", new Action<object>(Console.WriteLine))
                    .SetValue("assert", new Action<bool>(Assert.True))
                    .SetValue("equal", new Action<object, object>(Assert.Equal));
        }

        private void RunTest(string source)
        {
            _engine.Execute(source);
        }

        [Fact]
        public void EscapeUnicodeUnits()
        {
            var value = _engine.Evaluate(@"var a = '\uD83D\uDE80'; return a;").AsString();
            Assert.Equal("🚀", value);
        }

        [Fact]
        public void EscapeUnicodeEscaped()
        {
            var value = _engine.Evaluate(@"var a = '\u{1F680}'; return a;").AsString();
            Assert.Equal("🚀", value);
        }

        [Fact]
        public void UnicodeIdentifiers()
        {
            var value = _engine.Evaluate(@"const hello = 123; return hell\u{6F}").AsNumber();
            Assert.Equal(123, value);
        }

        [Fact]
        public void RegexDontParseUnicodeEscapesWithoutFlag()
        {
            var value = _engine.Evaluate(@"return /^\u{3}$/.test('uuu')").AsBoolean();
            Assert.True(value);
        }

        [Fact]
        public void RegexParseUnicodeEscapesWithFlag()
        {
            var value = _engine.Evaluate(@"return /^\u{3}$/u.test('uuu')").AsBoolean();
            Assert.False(value);
        }

        [Fact]
        public void RegexParseUnicodeDoesntChangeSource()
        {
            var value = _engine.Evaluate(@"return /a\u0041/.source").AsString();
            Assert.Equal("a\\u0041", value);
        }

    }
}