public void TokenPushedBackWhenAtStartOfLineThrowsException(bool throwsException)
{
ProgramLine programLine = new ProgramLine(30, _tokens);
var token = throwsException ? new Token(")", TokenClass.Seperator, TokenType.CloseBracket) : programLine.NextToken();
Test.Throws <InvalidOperationException>(() => programLine.PushToken(token), throwsException);
}
public void ProgramLineEndOfLineIsFalseIfEolPlusTokenIsPushedBack()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
var token1 = programLine.NextToken();
var token2 = programLine.NextToken();
var eolToken = programLine.NextToken();
programLine.PushToken(eolToken);
Assert.IsTrue(programLine.EndOfLine);
programLine.PushToken(token2);
programLine.PushToken(token1);
Assert.IsFalse(programLine.EndOfLine);
var nextToken = programLine.NextToken();
Assert.AreEqual(token1, nextToken);
nextToken = programLine.NextToken();
Assert.AreEqual(token2, nextToken);
}
public void WrongTokenPushedBackThrowsException(bool throwsException)
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
var secondToken = programLine.NextToken();
var thirdToken = programLine.NextToken();
var token = throwsException ? secondToken : thirdToken;
Test.Throws <InvalidOperationException>(() => programLine.PushToken(token), throwsException);
}
public void ProgramLineEndOfLineIsFalseIfLastTokenPushedBack()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
programLine.NextToken();
var lastToken = programLine.NextToken();
Assert.IsTrue(programLine.EndOfLine);
programLine.PushToken(lastToken);
Assert.IsFalse(programLine.EndOfLine);
}
public void ProgramLineEndOfLineIsTrueIfEolIsPushedBack()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
programLine.NextToken();
programLine.NextToken();
var eolToken = programLine.NextToken();
programLine.PushToken(eolToken);
Assert.IsTrue(programLine.EndOfLine);
var nextToken = programLine.NextToken();
Assert.AreEqual(TokenType.EndOfLine, nextToken.Seperator);
}
public void IfLastTokenPushedBackThenNextTokenReturnsIt()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
programLine.NextToken();
var lastToken = programLine.NextToken();
Assert.IsTrue(programLine.EndOfLine);
programLine.PushToken(lastToken);
Assert.IsFalse(programLine.EndOfLine);
var nextToken = programLine.NextToken();
Assert.AreEqual("THREE", nextToken.Text);
}