acdream/tests/AcDream.App.Tests/UI/MarkupDocumentTests.cs

using AcDream.App.UI;

namespace AcDream.App.Tests.UI;

public class MarkupDocumentTests
{
    private sealed class FakeBinding
    {
        public float HealthPercent => 0.5f;
        public uint? HealthCurrent => 109;
        public uint? HealthMax => 218;
        public float? ManaPercent => null;
        public uint? ManaCurrent => null;
        public uint? ManaMax => null;
    }

    [Fact]
    public void Build_CreatesPanelWithMeterFillLabelAndGeometry()
    {
        const string xml =
            "<panel id=\"acdream.vitals\" x=\"10\" y=\"30\" w=\"220\" h=\"96\" title=\"Vitals\">" +
            "  <meter id=\"health\" x=\"8\" y=\"24\" w=\"200\" h=\"14\" fill=\"{HealthPercent}\" cur=\"{HealthCurrent}\" max=\"{HealthMax}\" color=\"#FFFF0000\"/>" +
            "</panel>";

        var panel = MarkupDocument.Build(xml, new FakeBinding(), _ => ((uint)1, 32, 32));

        Assert.IsType<UiNineSlicePanel>(panel);
        Assert.Equal(10f, panel.Left);
        Assert.Equal(220f, panel.Width);
        Assert.Equal(2, panel.Children.Count);            // title UiLabel + 1 meter
        var meter = Assert.IsType<UiMeter>(panel.Children[1]);
        Assert.Equal(8f, meter.Left);
        Assert.Equal(200f, meter.Width);
        Assert.Equal(0.5f, meter.Fill());
        Assert.Equal("109/218", meter.Label());
    }

    [Fact]
    public void Build_NullBindingValuesYieldNullFillAndLabel()
    {
        const string xml =
            "<panel id=\"v\" x=\"0\" y=\"0\" w=\"10\" h=\"10\" title=\"V\">" +
            "  <meter id=\"mana\" x=\"0\" y=\"0\" w=\"10\" h=\"2\" fill=\"{ManaPercent}\" cur=\"{ManaCurrent}\" max=\"{ManaMax}\" color=\"#FF0000FF\"/>" +
            "</panel>";
        var panel = MarkupDocument.Build(xml, new FakeBinding(), _ => ((uint)1, 32, 32));
        var meter = Assert.IsType<UiMeter>(panel.Children[1]);
        Assert.Null(meter.Fill());
        Assert.Null(meter.Label());
    }

    [Fact]
    public void Build_ResizeAttrX_SetsHorizontalOnly()
    {
        const string xml = "<panel id=\"v\" x=\"0\" y=\"0\" w=\"100\" h=\"50\" title=\"V\" resize=\"x\"></panel>";
        var panel = MarkupDocument.Build(xml, new object(), _ => ((uint)1, 32, 32));
        Assert.True(panel.ResizeX);
        Assert.False(panel.ResizeY);
    }

    [Fact]
    public void Build_ParsesNineSliceBarSpriteIds()
    {
        const string xml = "<panel id=\"v\" x=\"0\" y=\"0\" w=\"100\" h=\"50\" title=\"V\">" +
            "<meter id=\"h\" x=\"0\" y=\"0\" w=\"100\" h=\"14\" fill=\"{HealthPercent}\" " +
            "backleft=\"0x06001141\" backtile=\"0x06001140\" backright=\"0x0600113F\" " +
            "frontleft=\"0x06001131\" fronttile=\"0x06001132\" frontright=\"0x06001133\"/>" +
            "</panel>";
        var panel = MarkupDocument.Build(xml, new FakeBinding(), _ => ((uint)7, 32, 32));
        var meter = Assert.IsType<UiMeter>(panel.Children[1]);
        Assert.Equal(0x06001141u, meter.BackLeft);
        Assert.Equal(0x06001140u, meter.BackTile);
        Assert.Equal(0x0600113Fu, meter.BackRight);
        Assert.Equal(0x06001131u, meter.FrontLeft);
        Assert.Equal(0x06001132u, meter.FrontTile);
        Assert.Equal(0x06001133u, meter.FrontRight);
        Assert.NotNull(meter.SpriteResolve);
    }

    private sealed class ButtonBinding
    {
        public int Clicks { get; private set; }
        public string Status { get; set; } = "idle";
        public Action Go => () => Clicks++;
        public Action? Missing => null;
    }

    [Fact]
    public void Build_ButtonInvokesTheBoundActionOnClick()
    {
        const string xml =
            "<panel x=\"0\" y=\"0\" w=\"100\" h=\"60\">" +
            "  <button x=\"4\" y=\"8\" w=\"60\" h=\"20\" text=\"Buff\" onclick=\"{Go}\"/>" +
            "</panel>";

        var binding = new ButtonBinding();
        var panel = MarkupDocument.Build(xml, binding, _ => ((uint)1, 32, 32));

        var button = Assert.IsType<UiSimpleButton>(panel.Children[0]);
        Assert.Equal("Buff", button.Text);
        Assert.Equal(60f, button.Width);

        button.OnEvent(new UiEvent { Type = UiEventType.Click });
        button.OnEvent(new UiEvent { Type = UiEventType.Click });
        Assert.Equal(2, binding.Clicks);
    }

    [Fact]
    public void Build_ButtonWithUnresolvableHandlerFailsLoudly()
    {
        // A silently dead button is worse than a panel that refuses to load:
        // the user clicks and nothing happens, with nothing to diagnose.
        const string xml =
            "<panel x=\"0\" y=\"0\" w=\"100\" h=\"60\">" +
            "  <button x=\"0\" y=\"0\" w=\"10\" h=\"10\" text=\"X\" onclick=\"{NoSuchProperty}\"/>" +
            "</panel>";

        Assert.Throws<FormatException>(
            () => MarkupDocument.Build(xml, new ButtonBinding(), _ => ((uint)1, 32, 32)));
    }

    [Fact]
    public void Build_BoundLabelTracksTheBindingRatherThanFreezing()
    {
        const string xml =
            "<panel x=\"0\" y=\"0\" w=\"100\" h=\"60\">" +
            "  <label x=\"2\" y=\"4\" text=\"{Status}\"/>" +
            "</panel>";

        var binding = new ButtonBinding();
        var panel = MarkupDocument.Build(xml, binding, _ => ((uint)1, 32, 32));

        var label = Assert.IsType<UiLabel>(panel.Children[0]);
        Assert.Equal("idle", label.TextSource!());

        binding.Status = "casting";
        Assert.Equal("casting", label.TextSource!());
    }

    [Fact]
    public void Build_LiteralLabelTextIsUsedVerbatim()
    {
        const string xml =
            "<panel x=\"0\" y=\"0\" w=\"100\" h=\"60\">" +
            "  <label x=\"0\" y=\"0\" text=\"MossTank\"/>" +
            "</panel>";

        var panel = MarkupDocument.Build(xml, new ButtonBinding(), _ => ((uint)1, 32, 32));
        var label = Assert.IsType<UiLabel>(panel.Children[0]);
        Assert.Equal("MossTank", label.TextSource!());
    }
}