public void IncreementEditsCount()
{
var doc = new TextDocument("hello world");
doc.MakeReplaceCommand(0, 1, "H").Do();
doc.MakeReplaceCommand(0, 1, "H").Do();
Assert.AreEqual(2, doc.EditsCount);
}
public void Test()
{
var doc = new TextDocument("hello world");
var cmd = doc.MakeReplaceCommand(0, 1, "H");
cmd.Do();
Assert.AreEqual("Hello world", doc.Text);
var cmd2 = doc.MakeReplaceCommand(6, 5, "all!");
cmd2.Do();
Assert.AreEqual("Hello all!", doc.Text);
Assert.AreEqual(2, doc.EditsCount);
cmd2.Undo();
Assert.AreEqual(1, doc.EditsCount);
cmd.Undo();
Assert.AreEqual(0, doc.EditsCount);
Assert.AreEqual("hello world", doc.Text);
try
{
cmd2.Undo();
Assert.Fail("Should not be able to undo command which was not executed before");
}
catch (InvalidOperationException)
{
Console.WriteLine("Exception was thrown!");
}
}
public ReplaceCommand(TextDocument textDocument, int startIndex, int len, string newText)
{
this.textDocument = textDocument;
this.startIndex = startIndex;
this.len = len;
this.newText = newText;
this.oldText = textDocument.Text.Substring(startIndex, len);
}
public void RestoreDocumentToPreviousState(string input)
{
var doc = new TextDocument(input);
var cmd = doc.MakeReplaceCommand(0, 1, "H");
cmd.Do();
cmd.Undo();
Assert.AreEqual(0, doc.EditsCount);
Assert.AreEqual(input, doc.Text);
}
public void WhenCommandIsNotDone_Fail()
{
var doc = new TextDocument("hello world!");
var cmd = doc.MakeReplaceCommand(0, 1, "H");
Assert.Throws<InvalidOperationException>(() => cmd.Undo());
}
public string Change(string input, int index, int count, string replacement)
{
var doc = new TextDocument(input);
doc.MakeReplaceCommand(index, count, replacement).Do();
return doc.Text;
}
public void SetUp()
{
doc = new TextDocument(DefaultText);
}