Test that a reopened library precaches a live photo with no JSON file

Reopening the library over a live photo's image and video in the cache
with no JSON file beside them records no original for the photo; the
precache then fetches both and writes the JSON file.

Model: opus-5-5

test/library/content-library.test.ts

@@ -176,6 +176,66 @@ describe("Library content wiring", () => {
         await lib.close();
     });
 
+    it("does not take a live photo's image or video with no JSON file as its original when it opens, and precaches both", async () => {
+        const { file: live, body } = await asLivePhoto(file(1, 1));
+        class LiveClient extends MockClient {
+            override async filesSince(): Promise<FilesPage> {
+                return { files: [live], deleted: [], cursor: 1 };
+            }
+        }
+        const originals = join(root, "cache", "originals");
+        const open = (opts: Partial<LibraryOptions>): Promise<Library> =>
+            Library.open({
+                client: new LiveClient(),
+                cacheDirectory: join(root, "cache"),
+                contentSource: cdnSource(new Map([[1, body]])),
+                refreshIntervalSeconds: 3600,
+                precacheThumbnails: false,
+                precacheOriginals: false,
+                ...opts,
+            });
+        // A first run records the library, so the next one knows that file 1
+        // is a live photo when it opens the cache.
+        await (await open({})).close();
+        writeFileSync(join(originals, "1.heic"), "an image");
+        writeFileSync(join(originals, "1.mov"), "a video");
+
+        let precached!: () => void;
+        const done = new Promise<void>((r) => (precached = r));
+        const lib = await open({
+            precacheOriginals: true,
+            onProgress: (e) => {
+                if (e.operation === "precacheOriginals" && e.status === "done")
+                    precached();
+            },
+        });
+        expect(
+            lib.photos.byID({ fileID: 1 })!.record().originalPath,
+        ).toBeUndefined();
+        await done;
+
+        expect(readdirSync(originals).sort()).toEqual([
+            "1.heic",
+            "1.livephoto.json",
+            "1.mov",
+        ]);
+        expect(readFileSync(join(originals, "1.heic"))).toEqual(
+            Buffer.from(IMAGE),
+        );
+        expect(readFileSync(join(originals, "1.mov"))).toEqual(
+            Buffer.from(VIDEO),
+        );
+        expect(
+            JSON.parse(
+                readFileSync(join(originals, "1.livephoto.json"), "utf-8"),
+            ),
+        ).toEqual({ image: "1.heic", video: "1.mov" });
+        expect(lib.photos.byID({ fileID: 1 })!.record().originalPath).toBe(
+            join(originals, "1.heic"),
+        );
+        await lib.close();
+    });
+
     it("throws from content methods when opened without a content source", async () => {
         const lib = await Library.open({
             client: new MockClient(),