public void AllowEmptyProgramAtCreation()
{
var microScanner = new MicroScanner(string.Empty);
Assert.IsNotNull(microScanner);
Assert.AreEqual(string.Empty, microScanner.Input);
}
public void DetectAndReturnMinusOp()
{
string program = "-";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("MinusOp", token.Name);
}
public void DetectAndIgnoreCommentLine()
{
string program = "-- Some comment 12345\r\n ";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("EofSym", token.Name);
Assert.AreEqual("EOF", token.Value);
}
public void DetectAndReturnLiteral()
{
string program = "abcdefghijklmnopqrstuvwxyz0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("Id", token.Name);
Assert.AreEqual(program, token.Value);
}
public void DetectAndReturnEndReservedWord()
{
string program = "End";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("EndSym", token.Name);
Assert.AreEqual("END", token.Value);
}
public void DetectAndReturnWriteReservedWord()
{
string program = "Write";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("WriteSym", token.Name);
Assert.AreEqual("WRITE", token.Value);
}
public void ReturnLexicalErrorWhenBadCharactersEncountered()
{
string program = "First<Second";
var microScanner = new MicroScanner(program);
var token = microScanner.Scan();
Assert.AreEqual("Id", token.Name);
Assert.AreEqual("First", token.Value);
token = microScanner.Scan();
Assert.AreEqual("Lexical Error", token.Name, token.Value);
Assert.AreEqual("Bad char value: '<'", token.Value);
token = microScanner.Scan();
Assert.AreEqual("Id", token.Name);
Assert.AreEqual("Second", token.Value);
}