public void ParsingAttribute()
{
var result = grammar.Attribute(Source("foo=\"quad\""));
Assert.IsNotNull(result);
Assert.AreEqual("foo", result.Value.Name);
Assert.AreEqual("quad", result.Value.Value);
var result2 = grammar.Attribute(Source("foo2='quad2'"));
Assert.IsNotNull(result2);
Assert.AreEqual("foo2", result2.Value.Name);
Assert.AreEqual("quad2", result2.Value.Value);
var result3 = grammar.Attribute(Source("foo3!='quad2'"));
Assert.IsNull(result3);
}