// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#nullable enable
namespace System.Windows.Forms.Design.Tests;
public class MaskedTextBoxTextEditorDropDownTests
{
[Fact]
public void Value_ReturnsNull_WhenCancelled()
{
using MaskedTextBox maskedTextBox = new();
using MaskedTextBoxTextEditorDropDown dropDown = new(maskedTextBox);
dropDown.TestAccessor().Dynamic._cancel = true;
dropDown.Value.Should().BeNull();
}
[Fact]
public void Value_ReturnsText_WhenNotCancelled()
{
using MaskedTextBox maskedTextBox = new("00000");
maskedTextBox.Text = "12345";
using MaskedTextBoxTextEditorDropDown dropDown = new(maskedTextBox);
dropDown.TestAccessor().Dynamic._cancel = false;
dropDown.Value.Should().Be("12345");
}
[Fact]
public void ProcessDialogKey_SetsCancel_WhenEscapePressed()
{
using MaskedTextBox maskedTextBox = new();
using MaskedTextBoxTextEditorDropDown dropDown = new(maskedTextBox);
bool processDialogKey = dropDown.TestAccessor().Dynamic.ProcessDialogKey(Keys.Escape);
bool cancel= dropDown.TestAccessor().Dynamic._cancel;
cancel.Should().BeTrue();
processDialogKey.Should().BeFalse();
}
[Fact]
public void MaskInputRejected_SetsError_WhenInputRejected()
{
using MaskedTextBox maskedTextBox = new("00:00");
using MaskedTextBoxTextEditorDropDown dropDown = new(maskedTextBox);
using ErrorProvider errorProvider = dropDown.TestAccessor().Dynamic._errorProvider;
// No error when setting a correct format value.
using MaskedTextBox dropDownMaskedTextBox = dropDown.TestAccessor().Dynamic._cloneMtb;
dropDownMaskedTextBox.Text = "12:20";
errorProvider.GetError(dropDownMaskedTextBox).Should().Be(string.Empty);
// Incorrectly formatted values will result in the error "Error at position 0: expected number".
dropDownMaskedTextBox.Text = "invalid";
errorProvider.GetError(dropDownMaskedTextBox).Should().Contain(SR.MaskedTextBoxHintDigitExpected);
}
}
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