public void InsertBetweenExistingPositions()
{
TSBuilder builder = new TSBuilder();
builder.Text("ab");
BuilderPosition p1 = builder.CreatePosition();
builder.Text("cd");
BuilderPosition p2 = builder.CreatePosition();
builder.Text("ef");
Assert.AreEqual(2, p1.CharactersAfterPreviousPosition);
Assert.AreEqual(2, p1.GetIndexInBuilder());
Assert.AreEqual(2, p2.CharactersAfterPreviousPosition);
Assert.AreEqual(4, p2.GetIndexInBuilder());
builder.Insert(3, "Z");
Assert.AreEqual("abcZdef", builder.ToString());
Assert.AreEqual(2, p1.CharactersAfterPreviousPosition);
Assert.AreEqual(2, p1.GetIndexInBuilder());
Assert.AreEqual(3, p2.CharactersAfterPreviousPosition);
Assert.AreEqual(5, p2.GetIndexInBuilder());
}
public void CreatePositionWithEmptyBuilder()
{
TSBuilder builder = new TSBuilder();
BuilderPosition p = builder.CreatePosition();
Assert.AreEqual(0, p.CharactersAfterPreviousPosition);
Assert.AreEqual(0, p.GetIndexInBuilder());
Assert.AreSame(p, builder.CreatePosition());
}
public void InsertAtAnExistingPosition()
{
TSBuilder builder = new TSBuilder();
BuilderPosition p = builder.CreatePosition();
builder.Insert(0, "abcd");
Assert.AreEqual("abcd", builder.ToString());
Assert.AreEqual(4, p.CharactersAfterPreviousPosition);
Assert.AreEqual(4, p.GetIndexInBuilder());
}
public void CreatePositionWithNonEmptyBuilder()
{
Builder builder = new Builder();
builder.Text("abcd");
BuilderPosition p = builder.CreatePosition();
Assert.AreEqual(4, p.CharactersAfterPreviousPosition);
Assert.AreEqual(4, p.GetIndexInBuilder());
Assert.AreSame(p, builder.CreatePosition());
}
public void CreatePositionWhenAnotherPositionAlreadyExists()
{
TSBuilder builder = new TSBuilder();
BuilderPosition p1 = builder.CreatePosition();
builder.Text("abcd");
BuilderPosition p2 = builder.CreatePosition();
Assert.AreEqual(0, p1.CharactersAfterPreviousPosition);
Assert.AreEqual(0, p1.GetIndexInBuilder());
Assert.AreEqual(4, p2.CharactersAfterPreviousPosition);
Assert.AreEqual(4, p2.GetIndexInBuilder());
}
public void InsertAfterAnExistingPosition()
{
TSBuilder builder = new TSBuilder();
builder.Text("abc");
BuilderPosition p = builder.CreatePosition();
builder.Text("df");
Assert.AreEqual(3, p.CharactersAfterPreviousPosition);
Assert.AreEqual(3, p.GetIndexInBuilder());
builder.Insert(4, "e");
Assert.AreEqual(3, p.CharactersAfterPreviousPosition);
Assert.AreEqual(3, p.GetIndexInBuilder());
}
public void InsertBeforeAnExistingPosition()
{
Builder builder = new Builder();
builder.Text("abd");
BuilderPosition p = builder.CreatePosition();
builder.Text("ef");
Assert.AreEqual(3, p.CharactersAfterPreviousPosition);
Assert.AreEqual(3, p.GetIndexInBuilder());
builder.Insert(2, "c");
Assert.AreEqual(4, p.CharactersAfterPreviousPosition);
Assert.AreEqual(4, p.GetIndexInBuilder());
}
/// <summary>
/// Create a position object that will track a certain position within the TSBuilder's content.
/// </summary>
/// <returns></returns>
public BuilderPosition CreatePosition()
{
BuilderPosition position;
int contentLength = contents.Length;
if (!positions.Any())
{
position = new BuilderPosition(null, contentLength);
positions.Add(position);
}
else
{
position = positions.Last();
int lastPositionIndexInBuilder = position.GetIndexInBuilder();
if (lastPositionIndexInBuilder != contentLength)
{
position = new BuilderPosition(position, contentLength - lastPositionIndexInBuilder);
positions.Add(position);
}
}
return(position);
}
