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

app/Tests/BeyondFactsLab/BflModelRequirementsTests.cs

@@ -0,0 +1,32 @@
+using AIStudio.Assistants.BeyondFactsLab;
+using AIStudio.Models;
+
+namespace AIStudio.Tests.BeyondFactsLab;
+
+/// <summary>
+/// Checks which models the BeyondFacts Lab accepts for its chats.
+/// </summary>
+[TestFixture]
+public sealed class BflModelRequirementsTests
+{
+    [Test]
+    public void AModelWithoutAStatementAboutItsWindowIsAccepted()
+    {
+        Assert.That(BflModelRequirements.HasEnoughContext(ContextWindow.UNKNOWN), Is.True);
+    }
+
+    [TestCase(8_192, false)]
+    [TestCase(BflModelRequirements.MINIMUM_CONTEXT_TOKENS - 1, false)]
+    [TestCase(BflModelRequirements.MINIMUM_CONTEXT_TOKENS, true)]
+    [TestCase(128_000, true)]
+    public void AKnownWindowNeedsTheMinimum(int defaultTokens, bool expected)
+    {
+        Assert.That(BflModelRequirements.HasEnoughContext(ContextWindow.Of(defaultTokens)), Is.EqualTo(expected));
+    }
+
+    [Test]
+    public void AWindowWhichOnlyAnOperatorCouldRaiseIsNotEnough()
+    {
+        Assert.That(BflModelRequirements.HasEnoughContext(ContextWindow.Of(16_384, 131_072)), Is.False, "What a model reads as it ships counts, not what it might read.");
+    }
+}