public void GetPosition_AdvanceCharAfterNewLine_NewLineCounterIsUpdated()
{
var sut = new TextSource("a\ncdef");
sut.AdvanceChar(2);
var actualPosition = sut.GetPosition();
Assert.Equal('c', sut.Current);
Assert.Equal(1, actualPosition.Column);
Assert.Equal(2, actualPosition.Line);
sut.AdvanceChar();
actualPosition = sut.GetPosition();
Assert.Equal(2, actualPosition.Column);
Assert.Equal(2, actualPosition.Line);
}
public void AdvanceChar_MovesGivenAmountOfChars()
{
var sut = new TextSource("abcdef");
sut.AdvanceChar(3);
Assert.Equal('d', sut.Current);
Assert.Equal('e', sut.Next);
}
public void AdvanceChar_MovesCurrentToNextChar()
{
var sut = new TextSource("abcdef");
sut.AdvanceChar();
Assert.Equal('b', sut.Current);
Assert.Equal('c', sut.Next);
}
public void IsEnded_WhenAdvancementIsMadeAfterString_ReturnsTrue()
{
const string input = "abcdef";
var sut = new TextSource(input);
sut.AdvanceChar(input.Length);
Assert.True(sut.IsEnded);
}
public void AsSlice_ReturnsCharArrayFromCurrentCharacter()
{
var sut = new TextSource("abcdef");
sut.AdvanceChar(2);
Assert.Equal(4, sut.Slice().Length);
Assert.Equal("cdef", new string(sut.Slice()));
}
public void GetPosition_AdvanceCharCalled_IsUpdated()
{
var sut = new TextSource("abcdef");
sut.AdvanceChar();
var actualPosition = sut.GetPosition();
Assert.Equal(2, actualPosition.Column);
Assert.Equal(1, actualPosition.Line);
}