public void Left()
{
var view = _Azuki.View as IViewInternal;
// EOL
_Azuki.Text = "a\rb\nc\r\nd";
_Azuki.SetSelection(8, 8);
Assert.AreEqual(7, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(7, 7);
Assert.AreEqual(5, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(5, 5);
Assert.AreEqual(4, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(4, 4);
Assert.AreEqual(3, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(3, 3);
Assert.AreEqual(2, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(2, 2);
Assert.AreEqual(1, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(1, 1);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(0, 0);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
// surrogate pair
_Azuki.Text = "a\xd85a\xdd51b";
_Azuki.SetSelection(4, 4);
Assert.AreEqual(3, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(3, 3);
Assert.AreEqual(1, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(1, 1);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(0, 0);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
// combined character sequence
_Azuki.Text = "_a\x0300_";
_Azuki.SetSelection(4, 4);
Assert.AreEqual(3, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(3, 3);
Assert.AreEqual(1, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(1, 1);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
_Azuki.SetSelection(0, 0);
Assert.AreEqual(0, CaretMoveLogic.Calc_Left(view));
}
static void Test_Left()
{
// EOL
_Azuki.Text = "a\rb\nc\r\nd";
_Azuki.SetSelection(8, 8);
TestUtl.AssertEquals(7, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(7, 7);
TestUtl.AssertEquals(5, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(5, 5);
TestUtl.AssertEquals(4, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(4, 4);
TestUtl.AssertEquals(3, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(3, 3);
TestUtl.AssertEquals(2, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(2, 2);
TestUtl.AssertEquals(1, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(1, 1);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(0, 0);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
// surrogate pair
_Azuki.Text = "a\xd85a\xdd51b";
_Azuki.SetSelection(4, 4);
TestUtl.AssertEquals(3, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(3, 3);
TestUtl.AssertEquals(1, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(1, 1);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(0, 0);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
// combined character sequence
_Azuki.Text = "_a\x0300_";
_Azuki.SetSelection(4, 4);
TestUtl.AssertEquals(3, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(3, 3);
TestUtl.AssertEquals(1, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(1, 1);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
_Azuki.SetSelection(0, 0);
TestUtl.AssertEquals(0, CaretMoveLogic.Calc_Left(_Azuki.View));
}