Add designer file menu and package metadata

LehrerApp.TemplateDesigner.Tests/ProjectLifecycleTests.cs

@@ -0,0 +1,47 @@
+using LehrerApp.TemplateDesigner;
+using Xunit;
+
+namespace LehrerApp.TemplateDesigner.Tests;
+
+public sealed class ProjectLifecycleTests
+{
+    [Fact]
+    public void Reset_ErzeugtEinVollstaendigLeeresUnabhaengigesProjekt()
+    {
+        var viewModel = new DesignerViewModel();
+        viewModel.ImportAsset("logo.png", OnePixelPng);
+        viewModel.Placeholders.Add(new("Test", LehrerApp.Templating.PlaceholderType.Text, false, "Wert"));
+        viewModel.NewElementType = "IMG";
+        viewModel.NewContent = "logo.png";
+
+        viewModel.Reset();
+
+        Assert.Equal("neue-vorlage", viewModel.TemplateId);
+        Assert.Equal("PAGE 210 297 mm\n", viewModel.LayoutSource);
+        Assert.Empty(viewModel.Placeholders);
+        Assert.Empty(viewModel.Assets);
+        Assert.Empty(viewModel.AssetItems);
+        Assert.Equal("de-DE", viewModel.MetadataItems.Single(x => x.Name == "language").Value);
+        Assert.Equal("letter", viewModel.MetadataItems.Single(x => x.Name == "report-type").Value);
+        Assert.Null(viewModel.SelectedAsset);
+        Assert.Null(viewModel.PreviewImage);
+        Assert.Equal("TEXT", viewModel.NewElementType);
+        Assert.Equal("$Brieftext", viewModel.NewContent);
+        Assert.False(viewModel.CanExport);
+    }
+
+    [Fact]
+    public void FreieMetadaten_WerdenInDasManifestUebernommen()
+    {
+        var viewModel = new DesignerViewModel();
+        viewModel.MetadataItems.Add(new("school-year", "2026/27"));
+
+        var manifest = viewModel.BuildManifest();
+
+        Assert.Equal("de-DE", manifest.Metadata["language"]);
+        Assert.Equal("2026/27", manifest.Metadata["school-year"]);
+    }
+
+    private static readonly byte[] OnePixelPng = Convert.FromBase64String(
+        "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=");
+}