chore: establish learning module baseline

OpenMAIC/tests/server/classroom-media-generation.test.ts

@@ -0,0 +1,85 @@
+import { describe, expect, test } from 'vitest';
+import { replaceMediaPlaceholders } from '@/lib/server/classroom-media-generation';
+import type { Scene } from '@/lib/types/stage';
+
+function slideScene(
+  elements: Array<{ id: string; type: string; src?: string; mediaRef?: string }>,
+) {
+  return {
+    id: 'scene_1',
+    stageId: 'stage_1',
+    type: 'slide',
+    title: 'Scene',
+    order: 1,
+    content: {
+      type: 'slide',
+      canvas: {
+        id: 'canvas_1',
+        elements,
+      },
+    },
+  } as unknown as Scene;
+}
+
+describe('classroom media placeholder replacement', () => {
+  test('preserves direct video src when mediaRef is also present', () => {
+    const scene = slideScene([
+      {
+        id: 'video_1',
+        type: 'video',
+        src: 'https://example.com/direct.mp4',
+        mediaRef: 'gen_vid_real123',
+      },
+    ]);
+
+    replaceMediaPlaceholders([scene], {
+      gen_vid_real123: 'https://cdn.example.com/generated.mp4',
+    });
+
+    const content = scene.content as {
+      canvas: { elements: Array<{ src?: string }> };
+    };
+    const video = content.canvas.elements[0];
+    expect(video.src).toBe('https://example.com/direct.mp4');
+  });
+
+  test('preserves an author-supplied non-URL src when mediaRef is also present', () => {
+    const scene = slideScene([
+      {
+        id: 'video_1',
+        type: 'video',
+        src: 'lesson-intro.mp4',
+        mediaRef: 'gen_vid_real123',
+      },
+    ]);
+
+    replaceMediaPlaceholders([scene], {
+      gen_vid_real123: 'https://cdn.example.com/generated.mp4',
+    });
+
+    const content = scene.content as {
+      canvas: { elements: Array<{ src?: string }> };
+    };
+    expect(content.canvas.elements[0].src).toBe('lesson-intro.mp4');
+  });
+
+  test('does not treat an image placeholder as the video-manifest overwrite guard', () => {
+    const scene = slideScene([
+      {
+        id: 'video_1',
+        type: 'video',
+        src: 'gen_img_preview123',
+        mediaRef: 'gen_vid_real123',
+      },
+    ]);
+
+    replaceMediaPlaceholders([scene], {
+      gen_vid_real123: 'https://cdn.example.com/generated.mp4',
+    });
+
+    const content = scene.content as {
+      canvas: { elements: Array<{ src?: string }> };
+    };
+    expect(content.canvas.elements[0].src).toBe('gen_img_preview123');
+  });
+});