src/Carnac.Tests/MessageFacts.cs

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using System.Windows.Forms;
using Carnac.Logic.KeyMonitor;
using Carnac.Logic.Models;
using Xunit;
using Message = Carnac.Logic.Models.Message;

namespace Carnac.Tests
{
    public class MessageFacts
    {
        readonly ProcessInfo fakeProcess = new ProcessInfo("FakeProcess");

        [Fact]
        public void message_does_not_group_different_letters()
        {
            // arrange
            var message = new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "a" }));

            // act
            var result = message.Merge(new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "b" })));

            // assert
            var expected = string.Join(string.Empty, result.Text);
            Assert.Equal("ab", expected);
        }

        [Fact]
        public void message_does_not_group_letter_and_backspace()
        {
            // arrange
            var message = new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "a" }));

            // act
            var result = message.Merge(new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "Back" })));

            // assert
            Assert.Equal("aBack", string.Join(string.Empty, result.Text));
        }

        [Fact]
        public void message_groups_multiple_backspace_key_presses_together()
        {
            // arrange
            var message = new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "Back" }));

            // act
            var result = message.Merge(new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Back, KeyDirection.Down, false, false, false), false, new[] { "Back" })));

            // assert
            Assert.Equal("Back x 2 ", string.Join(string.Empty, result.Text));
        }

        [Fact]
        public void message_does_not_group_different_arrow_key_presses_together()
        {
            // arrange
            var message = new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Up, KeyDirection.Down, false, false, false), false, new[] { "Up" }));

            // act
            var result = message.Merge(new Message(new KeyPress(fakeProcess, new InterceptKeyEventArgs(Keys.Down, KeyDirection.Down, false, false, false), false, new[] { "Down" })));