gui-cs.Terminal.Gui/UnitTests/Views/DateFieldTests.cs

using System;
using System.Globalization;
using Xunit;

namespace Terminal.Gui.ViewsTests;
public class DateFieldTests {
	[Fact, TestDate]
	public void Constructors_Defaults ()
	{
		var df = new DateField ();
		Assert.Equal (DateTime.MinValue, df.Date);
		Assert.Equal (1, df.CursorPosition);
		Assert.Equal (new Rect (0, 0, 12, 1), df.Frame);
		Assert.Equal (" 01/01/0001", df.Text);

		var date = DateTime.Now;
		df = new DateField (date);
		Assert.Equal (date, df.Date);
		Assert.Equal (1, df.CursorPosition);
		Assert.Equal (new Rect (0, 0, 12, 1), df.Frame);
		Assert.Equal ($" {date.ToString (CultureInfo.InvariantCulture.DateTimeFormat.ShortDatePattern)}", df.Text);

		df = new DateField (date) { X = 1, Y = 2 };
		Assert.Equal (date, df.Date);
		Assert.Equal (1, df.CursorPosition);
		Assert.Equal (new Rect (1, 2, 12, 1), df.Frame);
		Assert.Equal ($" {date.ToString (CultureInfo.InvariantCulture.DateTimeFormat.ShortDatePattern)}", df.Text);
	}

	[Fact, TestDate]
	public void CursorPosition_Min_Is_Always_One_Max_Is_Always_Max_Format ()
	{
		var df = new DateField ();
		Assert.Equal (1, df.CursorPosition);
		df.CursorPosition = 0;
		Assert.Equal (1, df.CursorPosition);
		df.CursorPosition = 11;
		Assert.Equal (10, df.CursorPosition);
	}

	[Fact, TestDate]
	public void CursorPosition_Min_Is_Always_One_Max_Is_Always_Max_Format_After_Selection ()
	{
		var df = new DateField ();
		// Start selection
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorLeft | KeyCode.ShiftMask)));
		Assert.Equal (1, df.SelectedStart);
		Assert.Equal (1, df.SelectedLength);
		Assert.Equal (0, df.CursorPosition);
		// Without selection
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorLeft)));
		Assert.Equal (-1, df.SelectedStart);
		Assert.Equal (0, df.SelectedLength);
		Assert.Equal (1, df.CursorPosition);
		df.CursorPosition = 10;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorRight | KeyCode.ShiftMask)));
		Assert.Equal (10, df.SelectedStart);
		Assert.Equal (1, df.SelectedLength);
		Assert.Equal (11, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorRight)));
		Assert.Equal (-1, df.SelectedStart);
		Assert.Equal (0, df.SelectedLength);
		Assert.Equal (10, df.CursorPosition);
	}

	[Fact, TestDate]
	public void KeyBindings_Command ()
	{
		DateField df = new DateField (DateTime.Parse ("12/12/1971")) {
			ReadOnly = true
		};
		Assert.True (df.NewKeyDownEvent (new (KeyCode.Delete)));
		Assert.Equal (" 12/12/1971", df.Text);
		df.ReadOnly = false;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D | KeyCode.CtrlMask)));
		Assert.Equal (" 02/12/1971", df.Text);
		df.CursorPosition = 4;
		df.ReadOnly = true;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.Delete)));
		Assert.Equal (" 02/12/1971", df.Text);
		df.ReadOnly = false;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.Backspace)));
		Assert.Equal (" 02/02/1971", df.Text);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.Home)));
		Assert.Equal (1, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.End)));
		Assert.Equal (10, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.A | KeyCode.CtrlMask)));
		Assert.Equal (1, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.E | KeyCode.CtrlMask)));
		Assert.Equal (10, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorLeft)));
		Assert.Equal (9, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorRight)));
		Assert.Equal (10, df.CursorPosition);
		// Non-numerics are ignored
		Assert.False (df.NewKeyDownEvent (new (KeyCode.A)));
		df.ReadOnly = true;
		df.CursorPosition = 1;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D1)));
		Assert.Equal (" 02/02/1971", df.Text);
		df.ReadOnly = false;
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D1)));
		Assert.Equal (" 12/02/1971", df.Text);
		Assert.Equal (2, df.CursorPosition);
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D | KeyCode.AltMask)));
		Assert.Equal (" 10/02/1971", df.Text);
	}

	[Fact, TestDate]
	public void Typing_With_Selection_Normalize_Format ()
	{
		DateField df = new DateField (DateTime.Parse ("12/12/1971")) {
			// Start selection at before the first separator /
			CursorPosition = 2
		};
		// Now select the separator /
		Assert.True (df.NewKeyDownEvent (new (KeyCode.CursorRight | KeyCode.ShiftMask)));
		Assert.Equal (2, df.SelectedStart);
		Assert.Equal (1, df.SelectedLength);
		Assert.Equal (3, df.CursorPosition);
		// Type 3 over the separator
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D3)));
		// The format was normalized and replaced again with /
		Assert.Equal (" 12/12/1971", df.Text);
		Assert.Equal (4, df.CursorPosition);
	}

	[Fact, TestDate, AutoInitShutdown]
	public void Copy_Paste ()
	{
		DateField df1 = new DateField (DateTime.Parse ("12/12/1971"));
		DateField df2 = new DateField (DateTime.Parse ("12/31/2023"));
		// Select all text
		Assert.True (df2.NewKeyDownEvent (new (KeyCode.End | KeyCode.ShiftMask)));
		Assert.Equal (1, df2.SelectedStart);
		Assert.Equal (10, df2.SelectedLength);
		Assert.Equal (11, df2.CursorPosition);
		// Copy from df2
		Assert.True (df2.NewKeyDownEvent (new (KeyCode.C | KeyCode.CtrlMask)));
		// Paste into df1
		Assert.True (df1.NewKeyDownEvent (new (KeyCode.V | KeyCode.CtrlMask)));
		Assert.Equal (" 12/31/2023", df1.Text);
		Assert.Equal (11, df1.CursorPosition);
	}

	[Fact, TestDate]
	public void Date_Start_From_01_01_0001_And_End_At_12_31_9999 ()
	{
		DateField df = new DateField (DateTime.Parse ("01/01/0001"));
		Assert.Equal (" 01/01/0001", df.Text);
		df.Date = DateTime.Parse ("12/31/9999");
		Assert.Equal (" 12/31/9999", df.Text);
	}

	[Fact]
	public void Using_Pt_Culture ()
	{
		CultureInfo cultureBackup = CultureInfo.CurrentCulture;
		CultureInfo.CurrentCulture = new CultureInfo ("pt-PT");
		DateField df = new DateField (DateTime.Parse ("12/12/1971")) {
			// Move to the first 2
			CursorPosition = 2
		};
		// Type 3 over the separator
		Assert.True (df.NewKeyDownEvent (new (KeyCode.D3)));
		// If InvariantCulture was used this will fail but not with PT culture
		Assert.Equal (" 13/12/1971", df.Text);
		Assert.Equal ("13/12/1971", df.Date.ToString (CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern));
		Assert.Equal (4, df.CursorPosition);
		CultureInfo.CurrentCulture = cultureBackup;
	}

	[Fact]
	public void Using_All_Culture_StandardizeDateFormat ()
	{
		CultureInfo cultureBackup = CultureInfo.CurrentCulture;

		DateTime date = DateTime.Parse ("1/1/1971");
		foreach (var culture in CultureInfo.GetCultures (CultureTypes.AllCultures)) {
			CultureInfo.CurrentCulture = culture;
			var separator = culture.DateTimeFormat.DateSeparator.Trim ();
			if (separator.Length > 1 && separator.Contains ('\u200f')) {
				separator = separator.Replace ("\u200f", "");
			}
			var format = culture.DateTimeFormat.ShortDatePattern;
			DateField df = new DateField (date);
			if ((!culture.TextInfo.IsRightToLeft || (culture.TextInfo.IsRightToLeft && !df.Text.Contains ('\u200f')))
				&& (format.StartsWith ('d') || format.StartsWith ('M'))) {

				switch (culture.Name) {
				case "ar-SA":
					Assert.Equal ($" 04{separator}11{separator}1390", df.Text);
					break;
				case "th":
				case "th-TH":
					Assert.Equal ($" 01{separator}01{separator}2514", df.Text);
					break;
				default:
					Assert.Equal ($" 01{separator}01{separator}1971", df.Text);
					break;
				}
			} else if (culture.TextInfo.IsRightToLeft) {
				if (df.Text.Contains ('\u200f')) {
					// It's a Unicode Character (U+200F) - Right-to-Left Mark (RLM)
					Assert.True (df.Text.Contains ('\u200f'));
					switch (culture.Name) {
					case "ar-SA":
						Assert.Equal ($" 04‏{separator}11‏{separator}1390", df.Text);
						break;
					default:
						Assert.Equal ($" 01‏{separator}01‏{separator}1971", df.Text);
						break;
					}
				} else {
					switch (culture.Name) {
					case "ckb-IR":
					case "fa":
					case "fa-AF":
					case "fa-IR":
					case "lrc":
					case "lrc-IR":
					case "mzn":
					case "mzn-IR":
					case "ps":
					case "ps-AF":
					case "uz-Arab":
					case "uz-Arab-AF":
						Assert.Equal ($" 1349{separator}10{separator}11", df.Text);
						break;
					default:
						Assert.Equal ($" 1971{separator}01{separator}01", df.Text);
						break;
					}
				}
			} else {
				switch (culture.Name) {
				default:
					Assert.Equal ($" 1971{separator}01{separator}01", df.Text);
					break;
				}
			}
		}

		CultureInfo.CurrentCulture = cultureBackup;
	}
}