public void PeekTestNotModifiyngFile()
{
IParsedFile file = new ParsedFile(_sampleFolderPath + "Sample_file.txt");
for (int i = 0; i < 10; ++i)
{
IParsedLine peekedFirstLine = file.PeekNextLine(); // Allows its modification without extracting it
int peekedN = peekedFirstLine.PeekNextElement <int>();
Assert.Equal(peekedN, peekedFirstLine.PeekNextElement <int>());
IParsedLine peekedFirstLine2 = file.PeekNextLine();
int peekedN2 = peekedFirstLine.PeekNextElement <int>();
Assert.Equal(peekedN2, peekedFirstLine2.PeekNextElement <int>());
Assert.Equal(peekedN, peekedN2);
}
}
public void LineAt()
{
IParsedFile file = new ParsedFile(_sampleFolderPath + "Sample_file.txt");
IParsedLine lineAt0 = file.LineAt(0);
int n = lineAt0.PeekNextElement <int>();
Assert.Equal(23, n);
int nPlusOne = n + 1;
lineAt0.Append($" {nPlusOne}");
file.Append(new ParsedLine(new[] { nPlusOne.ToString() }));
int totalNumberOfLines = file.Count;
IParsedLine firstLine = file.NextLine();
int nAgain = firstLine.NextElement <int>();
string str = firstLine.NextElement <string>();
int incrementedN = firstLine.NextElement <int>();
Assert.Equal(n, nAgain);
Assert.Equal(nPlusOne, incrementedN);
Assert.Equal("food", str);
IParsedLine lastLine = file.LastLine();
Assert.Equal(incrementedN, lastLine.PeekNextElement <int>());
for (int lineIndex = 1; lineIndex < totalNumberOfLines - 1; ++lineIndex)
{
IParsedLine line = file.NextLine();
int counter = line.NextElement <int>();
for (int j = 0; j < counter; ++j)
{
line.NextElement <int>();
}
while (!line.Empty)
{
line.NextElement <string>();
}
}
IParsedLine extraLine = file.NextLine();
Assert.Equal(incrementedN, extraLine.NextElement <int>());
Assert.True(extraLine.Empty);
Assert.Throws <ArgumentOutOfRangeException>(() => extraLine.ElementAt <string>(1));
Assert.Throws <InvalidOperationException>(() => extraLine.LastElement <string>());
Assert.True(file.Empty);
Assert.Throws <ArgumentOutOfRangeException>(() => file.LineAt(1));
Assert.Throws <InvalidOperationException>(() => file.LastLine());
}
private IEnumerable <Rectangle> ParseInput()
{
ICollection <Rectangle> rectangles = new List <Rectangle>();
IParsedFile parsedFile = new ParsedFile(FilePath);
while (!parsedFile.Empty)
{
IParsedLine parsedLine = parsedFile.NextLine();
string idString = parsedLine.NextElement <string>();
if (!idString.StartsWith("#"))
{
throw new Exception($"{idString} is not #n");
}
int.TryParse(idString.Trim('#'), out int id);
if (parsedLine.NextElement <string>() != "@")
{
throw new Exception($"Exception parsing @");
}
string[] x0y0 = parsedLine.NextElement <string>()
.Trim(':')
.Split(',');
if (x0y0.Length != 2)
{
throw new Exception($"Length of {x0y0} isn't 2");
}
int.TryParse(x0y0.First(), out int x0);
int.TryParse(x0y0.Last(), out int y0);
string[] xy = parsedLine.NextElement <string>()
.Split('x');
if (xy.Length != 2)
{
throw new Exception($"Length of {xy} isn't 2");
}
int.TryParse(xy.First(), out int x);
int.TryParse(xy.Last(), out int y);
if (!parsedLine.Empty)
{
throw new Exception($"Error parsing line, missing at least {parsedLine.PeekNextElement<string>()}");
}
rectangles.Add(new Rectangle(x: x, y: y, x0: x0, y0: y0)
{
Id = id
});
}
return(rectangles);
}
public void PeekTestEmptyingFile()
{
IParsedFile file = new ParsedFile(_sampleFolderPath + "Sample_file.txt");
IParsedLine peekedFirstLine = file.PeekNextLine(); // Allows its modification without extracting it
int peekedN = peekedFirstLine.PeekNextElement <int>();
Assert.Equal(peekedN, peekedFirstLine.NextElement <int>()); // Extracting the element
string peekedStr = peekedFirstLine.PeekNextElement <string>();
Assert.Equal(peekedStr, peekedFirstLine.NextElement <string>());
Assert.True(file.NextLine().Empty);
while (!file.Empty)
{
List <int> peekedNumberList = new();
List <string> peekedStringList = new();
IParsedLine peekedLine = file.PeekNextLine();
int peekedCounter = peekedLine.PeekNextElement <int>();
Assert.Equal(peekedCounter, peekedLine.NextElement <int>());
for (int j = 0; j < peekedCounter; ++j)
{
peekedNumberList.Add(peekedLine.PeekNextElement <int>());
Assert.Equal(peekedNumberList.Last(), peekedLine.NextElement <int>()); // Extracting the element
}
while (!peekedLine.Empty)
{
peekedStringList.Add(peekedLine.PeekNextElement <string>());
Assert.Equal(peekedStringList.Last(), peekedLine.NextElement <string>()); // Extracting the element
}
IParsedLine line = file.NextLine(); // Extracting the line, already emptied, to allow the test to finish
Assert.True(line.Empty);
}
}