Added research on the web to the BeyondFacts Lab (#1186)

app/Tests/BeyondFactsLab/BflResearchAvailabilityTests.cs

@@ -0,0 +1,54 @@
+using AIStudio.Assistants.BeyondFactsLab;
+using AIStudio.Tools.ToolCallingSystem;
+
+namespace AIStudio.Tests.BeyondFactsLab;
+
+/// <summary>
+/// Checks what the BeyondFacts Lab tells the person when its research cannot search the web.
+/// </summary>
+[TestFixture]
+public sealed class BflResearchAvailabilityTests
+{
+    [Test]
+    public void EveryReasonHasAMessageOfItsOwn()
+    {
+        var reasons = Enum.GetValues<ToolOfferBlockReason>().Where(reason => reason is not ToolOfferBlockReason.NONE).ToList();
+        var messages = reasons.Select(BflResearchAvailability.MessageFor).ToList();
+        var unknown = BflResearchAvailability.MessageFor((ToolOfferBlockReason)int.MaxValue);
+
+        using (Assert.EnterMultipleScope())
+        {
+            Assert.That(messages, Has.All.Not.Empty);
+            Assert.That(messages, Is.Unique);
+            Assert.That(messages, Has.None.EqualTo(unknown), "Every reason this version knows has a text of its own.");
+            Assert.That(unknown, Is.Not.Empty);
+        }
+    }
+
+    [Test]
+    public void NothingInTheWayNeedsNoMessage()
+    {
+        var availability = new BflResearchAvailability(ToolOfferBlockReason.NONE, ToolOfferBlockReason.NONE);
+
+        using (Assert.EnterMultipleScope())
+        {
+            Assert.That(availability.CanResearch, Is.True);
+            Assert.That(availability.Message, Is.Empty);
+        }
+    }
+
+    [Test]
+    public void TheWebSearchDecidesWhetherTheLabCanResearch()
+    {
+        var withoutReadingPages = new BflResearchAvailability(ToolOfferBlockReason.NONE, ToolOfferBlockReason.TOOL_SWITCHED_OFF);
+        var withoutSearching = new BflResearchAvailability(ToolOfferBlockReason.NOT_CONFIGURED, ToolOfferBlockReason.NONE);
+
+        using (Assert.EnterMultipleScope())
+        {
+            Assert.That(withoutReadingPages.CanResearch, Is.True);
+            Assert.That(withoutReadingPages.Message, Is.Empty);
+            Assert.That(withoutSearching.CanResearch, Is.False);
+            Assert.That(withoutSearching.Message, Is.EqualTo(BflResearchAvailability.MessageFor(ToolOfferBlockReason.NOT_CONFIGURED)));
+        }
+    }
+}