public void ProgramLineReturnsThreeTokens()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
Assert.AreEqual("ONE", programLine.NextToken().Text);
Assert.AreEqual("TWO", programLine.NextToken().Text);
Assert.AreEqual("THREE", programLine.NextToken().Text);
}
public void ProgramLineEndOfLineIsTrueOnceTokensRead()
{
ProgramLine programLine = new ProgramLine(30, _tokens);
programLine.NextToken();
programLine.NextToken();
programLine.NextToken();
Assert.IsTrue(programLine.EndOfLine);
}
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 ReturnUsesReturnAddressAndForNextLoops()
{
var runEnvironment = new RunEnvironment();
var sut = new Return(runEnvironment);
var line10 = new ProgramLine(10, new List <IToken> {
new Token("1000")
});
var line1000 = new ProgramLine(1000, new List <IToken> {
});
line10.NextToken();
runEnvironment.CurrentLine = line1000;
runEnvironment.ProgramStack.Push(new StackEntry {
Line = line10, LineToken = line10.CurrentToken
});
runEnvironment.ProgramStack.Push(new StackEntry {
Line = line10, LineToken = line10.CurrentToken
});
runEnvironment.ProgramStack.Push(new StackEntry {
VariableName = "A", Line = line10, LineToken = line10.CurrentToken
});
runEnvironment.ProgramStack.Push(new StackEntry {
VariableName = "B", Line = line10, LineToken = line10.CurrentToken
});
sut.Execute();
Assert.AreEqual(1, runEnvironment.ProgramStack.Count);
Assert.AreEqual(line10, runEnvironment.CurrentLine);
}
private string GetNextDataStatement()
{
if (_currentDataLine == null)
{
if (_faulted)
{
throw new Exceptions.OutOfDataException();
}
RestoreToLineNumber(null);
}
while (_currentDataLine != null)
{
while (!_currentDataLine.EndOfLine)
{
var token = _currentDataLine.NextToken();
if (token.TokenClass == TokenClass.Data)
{
return(token.Text);
}
}
_currentDataLine = _programRepository.GetNextLine(_currentDataLine.LineNumber.Value);
_runEnvironment.DataErrorLine = _currentDataLine?.LineNumber;
}
_faulted = true;
throw new Exceptions.OutOfDataException();
}
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);
}
public void EvaluatorGetLineThrowsExceptionOnBadLineNumber()
{
var tokens = new List <IToken>
{
new Token("20X00")
};
ProgramLine programLine = new ProgramLine(30, tokens);
var result = programLine.GetLineNumber();
Assert.IsNull(result);
Assert.AreEqual("20X00", programLine.NextToken().Text);
}
public void EvaluatorGetLineReturnsNullAndTokenIsNotEaten()
{
var tokens = new List <IToken>
{
new Token("DATA", TokenClass.Statement, TokenType.Data)
};
ProgramLine programLine = new ProgramLine(30, tokens);
var result = programLine.GetLineNumber();
Assert.AreEqual(null, result);
Assert.AreEqual("DATA", programLine.NextToken().Text);
}
public void EndTest()
{
var mockRunEnvironment = new Mock <IRunEnvironment>();
var programLine = new ProgramLine(30, new List <IToken> {
new Token("Name"), new Token("1")
});
programLine.NextToken();
mockRunEnvironment.Setup(mre => mre.CurrentLine).Returns(programLine);
var sut = new End(mockRunEnvironment.Object);
Test.Throws <EndException>(sut.Execute);
mockRunEnvironment.VerifySet(mre => mre.ContinueToken = 1);
}
public void PopDeletesReturnAddress()
{
var runEnvironment = new RunEnvironment();
var sut = new Pop(runEnvironment);
var line10 = new ProgramLine(10, new List <IToken> {
new Token("1000")
});
var line1000 = new ProgramLine(1000, new List <IToken> {
});
line10.NextToken();
runEnvironment.CurrentLine = line1000;
runEnvironment.ProgramStack.Push(new StackEntry {
Line = line10, LineToken = line10.CurrentToken
});
sut.Execute();
Assert.AreEqual(0, runEnvironment.ProgramStack.Count);
Assert.AreEqual(line1000, runEnvironment.CurrentLine);
}
public void ReturnThrowsWhenNoReturnAddress()
{
var runEnvironment = new RunEnvironment();
var sut = new Return(runEnvironment);
var line10 = new ProgramLine(10, new List <IToken> {
new Token("1000")
});
var line1000 = new ProgramLine(1000, new List <IToken> {
});
line10.NextToken();
runEnvironment.CurrentLine = line1000;
runEnvironment.ProgramStack.Push(new StackEntry {
VariableName = "A", Line = line10, LineToken = line10.CurrentToken
});
runEnvironment.ProgramStack.Push(new StackEntry {
VariableName = "B", Line = line10, LineToken = line10.CurrentToken
});
Test.Throws <ReturnWithoutGosubException>(sut.Execute);
}
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 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);
}
