public static IEnumerable<Token> Scan(string source)
{
var se = new SymbolsEnumerator(source);
var result = new Scanner(se).Scan();
se.Dispose();
return result;
}
public void ResetShouldSetPositionAsMinusOne()
{
var s = new SymbolsEnumerator("Elemar");
s.MoveNext();
s.Position.Should().Be(0);
s.Reset();
s.Position.Should().Be(-1);
}
//[ExpectedException(typeof(InvalidOperationException))]
public void CurrentFromIEnumeratorShouldThowsInvalidOperationExceptionWhenMoveNextWasNotCalled()
{
var s = new SymbolsEnumerator("Elemar");
object c;
Executing
.This(() => c = ((IEnumerator)s).Current)
.Should().Throw<InvalidOperationException>();
}
public void Initialization()
{
Assert.Throws<InvalidOperationException>(() =>
{
var s = new SymbolsEnumerator("Elemar");
var c = s.Current;
s.Dispose();
});
}
public Scanner(SymbolsEnumerator symbols)
{
_symbols = symbols;
}
public void CanRecognizeIdentifier(string input, bool result)
{
var symbols = new SymbolsEnumerator(input);
symbols.MoveNext();
symbols.CurrentPosCouldBeAnIdentifier().Should().Be(result);
}
public void CurrentFromIEnumeratorShouldReturnSameAsRegularCurrent()
{
var s = new SymbolsEnumerator("Elemar");
s.MoveNext();
s.Current.Should().Be(((IEnumerator)s).Current);
}