Initial commit

tests/drop-contract.test.mjs

@@ -0,0 +1,35 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { loadModule } from "./test-helpers.mjs";
+
+const contract = await loadModule("shared/utils/drop-contract.ts");
+const types = await loadModule("shared/types/drop.ts");
+const valid = {
+  version: 2,
+  chunkSize: types.CHUNK_SIZE,
+  chunkCount: 1,
+  noncePrefix: "AQIDBAUGBwg",
+  expiresIn: "24h",
+  maxReads: 1,
+};
+
+test("reservation validation accepts protocol geometry and rejects unsafe policies", () => {
+  assert.deepEqual(contract.validateReservation(valid), valid);
+  for (const bad of [
+    { ...valid, chunkSize: 1 },
+    { ...valid, chunkCount: 0 },
+    { ...valid, chunkCount: 1.5 },
+    { ...valid, expiresIn: "forever" },
+    { ...valid, maxReads: 2 },
+    { ...valid, unknown: true },
+    { ...valid, noncePrefix: "AA" },
+  ])
+    assert.throws(() => contract.validateReservation(bad));
+});
+
+test("manifest body must contain plaintext as well as the GCM tag", () => {
+  assert.throws(() => contract.validateManifestBodyLength(types.GCM_TAG_BYTES));
+  assert.doesNotThrow(() =>
+    contract.validateManifestBodyLength(types.GCM_TAG_BYTES + 1),
+  );
+});