Added PowerPoint templates to the Slide Assistant (#1055)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/Tests/Tools/PowerPoint/TemplateSlideUsesTests.cs

@@ -0,0 +1,54 @@
+using AIStudio.Tools.PowerPoint;
+
+namespace AIStudio.Tests.Tools.PowerPoint;
+
+/// <summary>
+/// Checks how the choices for some slides of a template, e.g., the preselection of an organization, become a use for each slide.
+/// </summary>
+[TestFixture]
+public sealed class TemplateSlideUsesTests
+{
+    [Test]
+    public void EverySlideGetsAUseInTheOrderOfTheTemplate()
+    {
+        var template = TemplateWithAContentSlideAndAClosingSlide();
+        var uses = new Dictionary<int, TemplateSlideUse> { [2] = TemplateSlideUse.KEEP }.ToTemplateSlideUses(template);
+
+        Assert.That(uses, Is.EqualTo(new[] { TemplateSlideUse.OMIT, TemplateSlideUse.KEEP }), "A slide without a choice is left out, as by default.");
+    }
+
+    [Test]
+    public void ASlideWithoutRoomForContentIsKeptInsteadOfEdited()
+    {
+        var template = TemplateWithAContentSlideAndAClosingSlide();
+        var uses = new Dictionary<int, TemplateSlideUse> { [1] = TemplateSlideUse.EDIT, [2] = TemplateSlideUse.EDIT }.ToTemplateSlideUses(template);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(template.Slides.Select(slide => slide.IsEditable), Is.EqualTo(new[] { true, false }), "The test needs one slide which the model can edit and one which it cannot.");
+            Assert.That(uses, Is.EqualTo(new[] { TemplateSlideUse.EDIT, TemplateSlideUse.KEEP }), "An organization may lock the choice, so it must not block the form.");
+        });
+    }
+
+    [Test]
+    public void AChoiceForASlideTheTemplateLacksIsPassedOver()
+    {
+        var template = TemplateWithAContentSlideAndAClosingSlide();
+        var uses = new Dictionary<int, TemplateSlideUse> { [0] = TemplateSlideUse.KEEP, [3] = TemplateSlideUse.EDIT }.ToTemplateSlideUses(template);
+
+        Assert.That(uses, Is.EqualTo(new[] { TemplateSlideUse.OMIT, TemplateSlideUse.OMIT }));
+    }
+
+    /// <summary>
+    /// A template whose first slide uses a layout with room for content, and whose second slide uses one with a title only.
+    /// </summary>
+    private static PresentationTemplate TemplateWithAContentSlideAndAClosingSlide()
+    {
+        using var file = TestTemplate.Create(
+            new TestTemplateOptions(Slides: [new TestSlide(0, (TestPlaceholder.Title(), "Mission")), new TestSlide(1, (TestPlaceholder.Title(), "Thank you"))]),
+            new TestLayout("Content", TestPlaceholder.Title(), TestPlaceholder.Text(1, TestTemplate.MASTER_BODY_BOUNDS)),
+            new TestLayout("Title Only", TestPlaceholder.Title()));
+
+        return PresentationTemplate.Read(file);
+    }
+}