private static StringList MakeAbsolute(AbsoluteFolderPath fromHere, RelativePath adjustment)
{
var result = fromHere.Parts.CloneSublist(fromHere.Parts.Count);
var enumerator = adjustment.Parts.GetEnumerator();
// skip the root
enumerator.MoveNext();
while (enumerator.MoveNext())
{
string part = enumerator.Current;
switch (part)
{
case ".":
break;
case "..":
// bug? can we go above the root here?
result.RemoveLast();
break;
default:
result.Add(part);
break;
}
}
return(result);
}
public void AbsoluteFolder_Theory(FolderArgs args)
{
if (args.Expected == null)
{
Trap.Exception(() => new AbsoluteFolderPath(args.Source))
.ShouldNotBeNull();
}
else
{
var folder = new AbsoluteFolderPath(args.Source);
Debug.Print(folder.ToString());
folder.ToString()
.ShouldEqual(args.Expected);
}
}
public void SubtractAbsoluteFile_Theory(TheoryArgs args)
{
AbsoluteFolderPath finish = args.LeftPath;
AbsoluteFilePath start = args.RightPath;
if (args.ExpectedPath == null)
{
Trap.Exception(() => { var _ = finish - start; })
.ShouldNotBeNull();
}
else
{
RelativeFolderPath relative = finish - start;
relative.ToString()
.ShouldEqual(args.ExpectedPath);
}
}
public void AddRelativeFolderPath_Theory(TheoryArgs args)
{
AbsoluteFolderPath absoulte = args.LeftPath;
RelativeFolderPath relative = args.RightPath;
if (args.ExpectedPath == null)
{
Trap.Exception(() => { var _ = absoulte + relative; })
.ShouldNotBeNull();
}
else
{
var combined = absoulte + relative;
combined.ToString()
.ShouldEqual(args.ExpectedPath);
}
}
private static StringList MakeRelative(AbsoluteFolderPath fromHere, AbsoluteFolderPath toHere)
{
if (fromHere.RootValue != toHere.RootValue)
{
throw new Exception("No shared root between: " + fromHere + " -> " + toHere);
}
bool hasFrom;
var @from = fromHere.Parts.GetEnumerator();
bool hasTo;
var @to = toHere.Parts.GetEnumerator();
while (true)
{
hasFrom = from.MoveNext();
hasTo = to.MoveNext();
if (!hasFrom || !hasTo || from.Current != to.Current)
{
break;
}
// eat all matches
}
//NB: dont forget the null absolute root
var relative = new StringList(new string[] {
null
});
while (hasFrom)
{
relative.Add("..");
hasFrom = from.MoveNext();
}
//NB: ensure we are relativly rooted
if (relative.Count == 1)
{
relative.Add(".");
}
while (hasTo)
{
relative.Add(to.Current);
hasTo = to.MoveNext();
}
return(relative);
}
