public void TestMoveLineUpAscending()
{
string value = "\n" +
"a\n" +
"cd\n" +
"fgh\n" +
"jklm";
int index = 0;
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
// second line
index = value.IndexOf('a');
Assert.AreEqual(0, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('a') + 1;
Assert.AreEqual(0, CStringUtils.MoveLineUp(value, index));
// third line
index = value.IndexOf('c');
Assert.AreEqual(value.IndexOf('a'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('d');
Assert.AreEqual(value.IndexOf('a') + 1, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('d') + 1;
Assert.AreEqual(value.IndexOf('a') + 1, CStringUtils.MoveLineUp(value, index));
// fourth line
index = value.IndexOf('f');
Assert.AreEqual(value.IndexOf('c'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('g');
Assert.AreEqual(value.IndexOf('d'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('h');
Assert.AreEqual(value.IndexOf('d') + 1, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('h') + 1;
Assert.AreEqual(value.IndexOf('d') + 1, CStringUtils.MoveLineUp(value, index));
// fifth line
index = value.IndexOf('j');
Assert.AreEqual(value.IndexOf('f'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('k');
Assert.AreEqual(value.IndexOf('g'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('l');
Assert.AreEqual(value.IndexOf('h'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('m');
Assert.AreEqual(value.IndexOf('h') + 1, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('m') + 1;
Assert.AreEqual(value.IndexOf('h') + 1, CStringUtils.MoveLineUp(value, index));
}
public void TestMoveLineUpEmpty()
{
string value = "\n" +
"\n" +
"";
// first line
Assert.AreEqual(0, CStringUtils.MoveLineUp(value, 0));
// second line
Assert.AreEqual(0, CStringUtils.MoveLineUp(value, 1));
// third line
Assert.AreEqual(1, CStringUtils.MoveLineUp(value, 2));
}
public void TestMoveLineUpDescending()
{
string value = "abcd\n" +
"fgh\n" +
"jk\n" +
"m\n" +
"\n" +
"";
int index = value.IndexOf('a');
// first line
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('b');
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('c');
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('d');
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('d') + 1;
Assert.AreEqual(index, CStringUtils.MoveLineUp(value, index));
// second line
index = value.IndexOf('f');
Assert.AreEqual(value.IndexOf('a'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('g');
Assert.AreEqual(value.IndexOf('b'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('h');
Assert.AreEqual(value.IndexOf('c'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('h') + 1;
Assert.AreEqual(value.IndexOf('d'), CStringUtils.MoveLineUp(value, index));
// third line
index = value.IndexOf('j');
Assert.AreEqual(value.IndexOf('f'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('k');
Assert.AreEqual(value.IndexOf('g'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('k') + 1;
Assert.AreEqual(value.IndexOf('h'), CStringUtils.MoveLineUp(value, index));
// fourth line
index = value.IndexOf('m');
Assert.AreEqual(value.IndexOf('j'), CStringUtils.MoveLineUp(value, index));
index = value.IndexOf('m') + 1;
Assert.AreEqual(value.IndexOf('k'), CStringUtils.MoveLineUp(value, index));
// fifth line
index = value.LastIndexOf('\n');
Assert.AreEqual(value.IndexOf('m'), CStringUtils.MoveLineUp(value, index));
index = value.LastIndexOf('\n') + 1;
Assert.AreEqual(value.LastIndexOf('\n'), CStringUtils.MoveLineUp(value, index));
}
