public void SkipWhitespaceSetsPositionOnNextNonWhitespace()
{
//Arrange
var keeper = new StringKeeper(" \t\n\r\ftest");
//Act
keeper.SkipWhiteSpace();
//Assert
keeper.Next.Should().Be('t');
}
public void TakeMovesThePositionAlong()
{
//Arrange
var keeper = new StringKeeper("test");
//Act
keeper.Take();
//Assert
keeper.Next.Should().Be('e');
}
public void FinishedShouldBeTrueAfterTakeAll()
{
//Arrange
var keeper = new StringKeeper("test");
//Act
keeper.TakeAll();
//Assert
keeper.Finished.Should().BeTrue();
}
public void TakeAllReturnsFullString()
{
//Arrange
var keeper = new StringKeeper("test");
//Act
var result = keeper.TakeAll();
//Assert
result.Should().Be("test");
}
public void TakeReturnsTheNextCharacter()
{
//Arrange
var keeper = new StringKeeper("test");
//Act
var result = keeper.Take();
//Assert
result.Should().Be("t");
}
public void NextInReturnsFalseIfFirstNotCharInRange()
{
//Arrange
var keeper = new StringKeeper("test");
//Act
var first = keeper.NextIn("nope");
//Assert
first.Should().BeFalse();
}
public void CopiedInstancesDoNotFollowTheOriginal()
{
//Arrange
var keeper = new StringKeeper("test");
var keeper2 = new StringKeeper(keeper);
//Act
keeper.TakeAll();
//Assert
keeper2.Finished.Should().BeFalse();
}
public void SkipWhitespaceWorksIfFinished()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.TakeAll();
//Act
keeper.SkipWhiteSpace();
//Assert
keeper.Finished.Should().BeTrue(); //well, still true anyway
}
public void CopiedInstancesShouldHaveTheSamePositionAsTheOriginal()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.Take();
//Act
var keeper2 = new StringKeeper(keeper);
//Assert
keeper2.TakeAll().Should().Be(keeper.TakeAll());
}
public void TakeAllReturnsRemainingText()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.Take();
//Act
var result = keeper.TakeAll();
//Assert
result.Should().Be("est");
}
public void FinishedShouldBeTrueWhenNoDataRemains()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.Take(); //t
keeper.Take(); //e
keeper.Take(); //s
keeper.Take(); //t
//Act/Assert
keeper.Finished.Should().BeTrue();
}
public void CopyingAFinishedInstanceShouldProduceAFinishedInstance()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.TakeAll();
//Act
var keeper2 = new StringKeeper(keeper);
//Assert
keeper2.Finished.Should().BeTrue();
}
public string Difference(StringKeeper old)
{
if (old._text != _text)
{
return(string.Empty);
}
if (old._index > _index)
{
return(string.Empty);
}
return(_text.Substring(old._index, _index - old._index));
}
public void WhitespaceSkippedDoesNotHaveToBeAtTheStart()
{
//Arrange
var keeper = new StringKeeper("X \t\n\r\ftest");
keeper.Take();
//Act
keeper.SkipWhiteSpace();
//Assert
keeper.Next.Should().Be('t');
}
public void SetNullAndSaveRemovesEntryFromConfig()
{
System.Configuration.Configuration config = CreateConfig();
config.AppSettings.Settings.Add(ConfigKey, Value);
config.Save();
StringKeeper keeper = CreateStringKeeper();
keeper.Set(Key, null);
keeper.Save();
config = CreateConfig();
Assert.IsFalse(config.AppSettings.Settings.AllKeys.Any());
}
public void SwapCopiesTheCorrectPositionIntoAnotherInstance()
{
//Arrange
var keeper = new StringKeeper("test");
var keeper2 = new StringKeeper(keeper);
keeper.TakeAll();
//Act
keeper.Swap(keeper2);
//Assert
keeper2.Finished.Should().BeTrue();
}
public void SwapImportsTheDetailsFromTheOtherInstance()
{
//Arrange
var keeper = new StringKeeper("test");
var keeper2 = new StringKeeper(keeper);
var takenData = keeper.TakeAll(); //keeper is now finished
//Act
keeper.Swap(keeper2);
//Assert
var result = keeper.TakeAll(); //if swap did not change keeper, this will return string.Empty
result.Should().Be(takenData);
}
public void TakeReturnsNulWhenNoDataRemains()
{
//Arrange
var keeper = new StringKeeper("test");
keeper.Take(); //t
keeper.Take(); //e
keeper.Take(); //s
keeper.Take(); //t
//Act
var result = keeper.Take();
//Assert
result.Should().Be("\0");
}
private static bool TryTake(StringKeeper stringKeeper, Dictionary <string, ApplyIfToken> tokens, out StringKeeper newStringKeeper, out ApplyIfToken token)
{
var thisToken = tokens.FirstOrDefault(x => stringKeeper.IsNext(x.Key, false));
if (thisToken.Key != null)
{
var work = stringKeeper.Take(thisToken.Key.Length);
newStringKeeper = work;
token = thisToken.Value;
return(true);
}
newStringKeeper = stringKeeper;
token = null;
return(false);
}
public void SetAndSaveReplacesEntryInConfig()
{
const string value = "Value";
const string anotherValue = "Another value";
System.Configuration.Configuration config = CreateConfig();
config.AppSettings.Settings.Add(ConfigKey, value);
config.Save();
StringKeeper keeper = CreateStringKeeper();
keeper.Set(Key, anotherValue);
keeper.Save();
config = CreateConfig();
Assert.IsTrue(config.AppSettings.Settings.AllKeys.Count() == 1);
Assert.AreEqual(anotherValue, config.AppSettings.Settings[ConfigKey].Value);
}
private static bool TryTakeIdentifier(StringKeeper stringKeeper, out StringKeeper newStringKeeper, out ApplyIfToken token)
{
var work = new StringKeeper(stringKeeper);
var value = string.Empty;
while (!IsTerminator(work))
{
value += work.Next;
work = work.Take();
}
if (!string.IsNullOrWhiteSpace(value))
{
newStringKeeper = work;
token = new ApplyIfToken(ApplyIfTokenType.Identifier, value);
return(true);
}
newStringKeeper = stringKeeper;
token = null;
return(false);
}
public ErrorToken(StringKeeper pos, string errorMessage)
{
Text = pos.TakeAll();
ErrorMessage = errorMessage;
}
public void GetReturnsNullWhenConfigEmpty()
{
StringKeeper keeper = CreateStringKeeper();
Assert.IsNull(keeper.Get(Key));
}
public StringKeeper(StringKeeper stringKeeper)
{
_index = stringKeeper._index;
_text = stringKeeper._text;
}
private static bool IsTerminator(StringKeeper stringKeeper)
{
return(stringKeeper.IsEmpty || stringKeeper.IsWhitespace || _terminators.Contains(stringKeeper.Next.ToString()));
}
