fix(plugins): unique csv row keys, per-file default mediaType, scale-aware zero rating

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

plugins/csv/test/csv.test.ts

@@ -66,4 +66,34 @@ describe("csv plugin", () => {
   test("unsupported extension throws", async () => {
     await expect(run("x.txt", new Uint8Array())).rejects.toThrow();
   });
+
+  const enc = (s: string) => new TextEncoder().encode(s);
+  test("duplicate rows get distinct deterministic keys", async () => {
+    const csv = "Title,Date Read\nA,2020-01-01\nA,2020-01-01\nB,\nB,\nB,\n";
+    const keys = async () => (await run("d.csv", enc(csv))).map((r) => r.key);
+    const k = await keys();
+    expect(new Set(k).size).toBe(k.length);
+    expect(k[0]).toMatch(/^row:[0-9a-f]{40}$/);
+    expect(k.some((x) => x.endsWith("#2"))).toBe(true);
+    expect(k.some((x) => x.endsWith("#3"))).toBe(true);
+    expect(await keys()).toEqual(k);
+  });
+
+  test("default mediaType is per file, not per row", async () => {
+    const csv = "Title,Author,ISBN13\nA,Someone,=\"9780441172719\"\nB,,\n";
+    const e = entries(await run("g.csv", enc(csv)));
+    expect(e.map((r) => r.work.mediaType)).toEqual(["book", "book"]);
+    const plain = entries(await run("p.csv", enc("Title\nA\n")));
+    expect(plain[0]!.work.mediaType).toBe("other");
+    const j = entries(await run("j.json", enc('[{"title":"A","author":"x"},{"title":"B"},{"title":"C","mediaType":"game"}]')));
+    expect(j.map((r) => r.work.mediaType)).toEqual(["book", "book", "game"]);
+  });
+
+  test("rating 0 is unrated only on scale 5", async () => {
+    const m = JSON.stringify({ T: "title", R: "rating" });
+    const rate = async (csv: string) => entries(await run("r.csv", enc(csv), { mapping: m })).map((r) => r.entry.rating ?? null);
+    expect(await rate("T,R\nA,0\nB,4\n")).toEqual([null, 80]);
+    expect(await rate("T,R\nA,0\nB,8\n")).toEqual([0, 80]);
+    expect(await rate("T,R\nA,0\nB,80\n")).toEqual([0, 80]);
+  });
 });