public void CanPeekCharWithIndex()
{
// Arrange.
TextBuffer buffer = new TextBuffer("This is some text");
// Act.
char c = buffer.PeekChar(10);
// Assert.
Assert.AreEqual('m', c);
}
public void PeekCharDetectsInvalidPosition()
{
// Arrange.
TextBuffer buffer = new TextBuffer("This is some text");
// Act.
char c = buffer.PeekChar(20);
// Assert.
Assert.AreEqual('\0', c);
}
public void CanPeekCharFirst()
{
// Arrange.
TextBuffer buffer = new TextBuffer("This is some text");
// Act.
char c = buffer.PeekChar();
// Assert.
Assert.AreEqual('T', c);
}
public void CorrectlyReportsColumnOnSingleLine()
{
// Arrange.
TextBuffer buffer = new TextBuffer(string.Format("Abc{0}Defg{0}C", "\r\n"));
// Act.
buffer.NextChar();
buffer.NextChar();
// Assert.
Assert.AreEqual(2, buffer.Column);
}
public void CanGetNextChar()
{
// Arrange.
TextBuffer buffer = new TextBuffer("This is some text");
// Act.
char c1 = buffer.NextChar();
char c2 = buffer.NextChar();
// Assert.
Assert.AreEqual('T', c1);
Assert.AreEqual('h', c2);
}
public void CorrectlyReportsRemainingLength()
{
// Arrange.
TextBuffer buffer = new TextBuffer("This is some text");
// Act.
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
// Assert.
Assert.AreEqual(12, buffer.RemainingLength);
}
public void CorrectlyReportsPosition()
{
// Arrange.
TextBuffer buffer = new TextBuffer(string.Format("Abc{0}Defg{0}C", "\r\n"));
// Act.
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
BufferPosition position = buffer.Position;
// Assert.
Assert.AreEqual(2, position.Column);
Assert.AreEqual(1, position.Line);
Assert.AreEqual(7, position.Offset);
}
public void CorrectlyReportsIsEofWhenTrue()
{
// Arrange.
TextBuffer buffer = new TextBuffer("Abc");
// Act.
buffer.NextChar();
buffer.NextChar();
buffer.NextChar();
// Assert.
Assert.AreEqual(true, buffer.IsEof);
}
protected LexerBase(string path, string text)
{
_path = path;
_buffer = new TextBuffer(text);
_value = new StringBuilder();
}
