chore: establish learning module baseline

OpenMAIC/tests/pbl/v2/instructor-intro.test.ts

@@ -0,0 +1,26 @@
+/**
+ * Tests for the learner-facing instructor intro selector (avatar hover title).
+ *
+ * Locks the "show curated description, fall back to nothing when blank/missing"
+ * rule. The avatar then renders `agentIntro ?? agentName` as a native `title`,
+ * so old projects (which may already carry a description) and new projects both
+ * surface the intro, and the cursor never changes.
+ */
+import { describe, expect, it } from 'vitest';
+import { instructorIntroText } from '@/components/scene-renderers/pbl/v2/instructor-intro';
+
+describe('instructorIntroText', () => {
+  it('returns the trimmed description when present', () => {
+    expect(
+      instructorIntroText({ description: '  我是你的向导 Aki，全程陪你做完这个项目。  ' }),
+    ).toBe('我是你的向导 Aki，全程陪你做完这个项目。');
+  });
+
+  it('returns undefined for blank / whitespace / missing description', () => {
+    expect(instructorIntroText({ description: '   ' })).toBeUndefined();
+    expect(instructorIntroText({ description: '' })).toBeUndefined();
+    expect(instructorIntroText({})).toBeUndefined();
+    expect(instructorIntroText(undefined)).toBeUndefined();
+    expect(instructorIntroText(null)).toBeUndefined();
+  });
+});