public void GoToStart()
{
string fileContent = "12345";
string path = $"{nameof(GoToStart)}.txt";
File.WriteAllText(path, fileContent);
using (var fr = new TextFileScanner(path)) {
while (fr.CanRead)
{
fr.Read();
}
fr.GoToStart();
Assert.IsTrue(fr.CanRead);
}
File.Delete(path);
}
public void GoToEnd()
{
string fileContent = "12345";
string path = $"{nameof(GoToEnd)}.txt";
File.WriteAllText(path, fileContent);
using (var fr = new TextFileScanner(path)) {
fr.GoToEnd();
Assert.AreEqual(fr.Line, 0);
Assert.AreEqual(fr.Peek(), TextFileScanner.EOF);
// + 2 to account for \r\n
Assert.AreEqual(fr.Column, fileContent.Length + 2);
Assert.IsFalse(fr.CanRead);
}
File.Delete(path);
}
public void GoNext()
{
string fileContent = "12345";
string path = $"{nameof(GoNext)}.txt";
File.WriteAllText(path, fileContent);
using (var fr = new TextFileScanner(path)) {
// + 2 for \r\n
for (int i = 0; i < fileContent.Length + 2; i++)
{
fr.GoNext();
}
Assert.IsFalse(fr.CanRead);
}
File.Delete(path);
}
public void ReadFileContent()
{
string fileContent = "12345";
string path = $"{nameof(ReadFileContent)}.txt";
File.WriteAllText(path, fileContent);
using (var fr = new TextFileScanner(path)) {
for (int i = 0; i < fileContent.Length; i++)
{
char c = fr.Read();
Assert.AreEqual(c, fileContent[i]);
}
// Two extra reads for the ending /r/n
fr.Read();
fr.Read();
Assert.IsFalse(fr.CanRead);
}
File.Delete(path);
}
public void GoPrevious()
{
string fileContent = "12345";
string path = $"{nameof(GoPrevious)}.txt";
File.WriteAllText(path, fileContent);
using (var fr = new TextFileScanner(path)) {
fr.GoToEnd();
// + 2 for \r\n
for (int i = 0; i <= fileContent.Length + 2 - 1; i++)
{
fr.GoPrevious();
}
Assert.AreEqual(fr.Line, 0);
Assert.AreEqual(fr.Column, 0);
Assert.IsTrue(fr.CanRead);
}
File.Delete(path);
}
public void ReadMultiLine()
{
string fileContent = @"1
2
3
4";
string path = $"{nameof(ReadMultiLine)}.txt";
File.WriteAllText(path, fileContent);
int count = 0;
using (var fr = new TextFileScanner(path)) {
while (fr.CanRead)
{
fr.Read();
count++;
}
}
File.Delete(path);
// + 2 to account for the last \r\n
Assert.AreEqual(fileContent.Length + 2, count);
}
