Added the guided chat to the BeyondFacts Lab (#1177)

app/Tests/BeyondFactsLab/BflPromptLibraryTests.cs

@@ -0,0 +1,69 @@
+using AIStudio.Assistants.BeyondFactsLab;
+using AIStudio.Settings.DataModel;
+
+namespace AIStudio.Tests.BeyondFactsLab;
+
+/// <summary>
+/// Checks that AI Studio comes with every prompt of the BeyondFacts Lab, and that they stay small enough.
+/// </summary>
+/// <remarks>
+/// The tests run a development build, which reads the prompts from its output folder: the project file copies every
+/// embedded file there as well.
+/// </remarks>
+[TestFixture]
+public sealed class BflPromptLibraryTests
+{
+    /// <summary>
+    /// How many characters the fixed part of the longest system prompt may have: the core, the guide, the longest step,
+    /// and the form of address.
+    /// </summary>
+    /// <remarks>
+    /// German takes about four characters per token, so this is about 22,000 tokens. The lab accepts models with a
+    /// context of 32,000 tokens; the rest is left for the details of the person and the conversation. Raising this
+    /// limit means raising that minimum, too.
+    /// </remarks>
+    private const int MAX_FIXED_PROMPT_CHARACTERS = 90_000;
+
+    [Test]
+    public async Task EveryPromptComesWithTheApp()
+    {
+        foreach (var path in BflPromptLibrary.AllPaths)
+            Assert.That(await BflPromptLibrary.ReadAsync(path), Is.Not.Empty, path);
+    }
+
+    [Test]
+    public void EveryStepHasAPromptOfItsOwn()
+    {
+        var paths = BflStep.All.Select(BflPromptLibrary.StepPath).ToList();
+
+        Assert.That(paths, Is.Unique);
+    }
+
+    [Test]
+    public void BothFormsOfAddressHaveAnInstructionOfTheirOwn()
+    {
+        Assert.That(BflPromptLibrary.AddressPath(AddressForm.INFORMAL), Is.Not.EqualTo(BflPromptLibrary.AddressPath(AddressForm.FORMAL)));
+    }
+
+    [Test]
+    public async Task AMissingPromptIsAnError()
+    {
+        await Assert.ThrowsAsync<FileNotFoundException>(async () => await BflPromptLibrary.ReadAsync("Assistants/BeyondFactsLab/Prompts/does-not-exist.md"));
+    }
+
+    [Test]
+    public async Task TheFixedPartOfTheLongestPromptLeavesRoomForTheConversation()
+    {
+        var core = await BflPromptLibrary.ReadAsync(BflPromptLibrary.CORE_PATH);
+        var knowledge = await BflPromptLibrary.ReadAsync(BflPromptLibrary.KNOWLEDGE_PATH);
+        var longestStep = 0;
+        foreach (var step in BflStep.All)
+            longestStep = Math.Max(longestStep, (await BflPromptLibrary.ReadAsync(BflPromptLibrary.StepPath(step))).Length);
+
+        var longestAddress = 0;
+        foreach (var addressForm in Enum.GetValues<AddressForm>())
+            longestAddress = Math.Max(longestAddress, (await BflPromptLibrary.ReadAsync(BflPromptLibrary.AddressPath(addressForm))).Length);
+
+        Assert.That(core.Length + knowledge.Length + longestStep + longestAddress, Is.LessThanOrEqualTo(MAX_FIXED_PROMPT_CHARACTERS));
+    }
+}