bitvid/tests/e2e/nostr-runtime-coverage.spec.ts

import { expect, test } from "./helpers/instrumentedTest";

const HEX_A = "a".repeat(64);
const HEX_B = "b".repeat(64);
const HEX_C = "c".repeat(64);
const HEX_D = "d".repeat(64);

test.describe("nostr runtime coverage (deterministic)", () => {
  test.beforeEach(async ({ page }) => {
    await page.goto("/docs/kitchen-sink.html", { waitUntil: "networkidle" });
  });

  test("exercises publish helper signing + rebroadcast guard paths", async ({
    page,
  }) => {
    const result = await page.evaluate(async ({ actorA, actorB }) => {
      const {
        deriveRebroadcastScope,
        deriveRebroadcastBucketIndex,
        rememberRebroadcastAttempt,
        hasRecentRebroadcastAttempt,
        getRebroadcastCooldownState,
        signAndPublishEvent,
      } = await import("/js/nostr/publishHelpers.js");

      const scope = deriveRebroadcastScope(actorA, "f".repeat(64));
      const bucket = deriveRebroadcastBucketIndex(1_700_000_000);
      rememberRebroadcastAttempt(scope, bucket);
      const hasRecent = hasRecentRebroadcastAttempt(scope, bucket);
      const cooldown = getRebroadcastCooldownState(scope);

      const publishCalls = [];
      const client = {
        pubkey: actorA,
        writeRelays: ["wss://relay.one", "wss://relay.two"],
        relays: ["wss://relay.one"],
        sessionActor: null,
        ensureSessionActor: async () => {
          client.sessionActor = {
            pubkey: actorB,
            privateKey: "1".repeat(64),
            source: "nip46",
          };
          return actorB;
        },
        pool: {
          publish(relays, event) {
            publishCalls.push({ relays, event });
            return {
              on(eventName, handler) {
                if (eventName === "ok") {
                  Promise.resolve().then(() => handler());
                }
              },
            };
          },
        },
      };

      const activeEvent = {
        kind: 1,
        pubkey: actorA,
        created_at: 123,
        tags: [],
        content: "active-signer",
      };

      const activeResult = await signAndPublishEvent({
        client,
        event: activeEvent,
        options: { context: "test-active", logName: "active" },
        resolveActiveSigner: () => ({
          signEvent: async (event) => ({
            ...event,
            id: "id-active",
            sig: "sig-active",
          }),
        }),
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: () => {
          throw new Error("unexpected-session-fallback");
        },
      });

      let fallbackSignCalls = 0;
      const fallbackEvent = {
        kind: 1,
        pubkey: actorB,
        created_at: 456,
        tags: [],
        content: "session-signer",
      };

      const fallbackResult = await signAndPublishEvent({
        client,
        event: fallbackEvent,
        options: { context: "test-fallback", logName: "fallback" },
        resolveActiveSigner: () => null,
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: (event) => {
          fallbackSignCalls += 1;
          return {
            ...event,
            id: "id-session",
            sig: "sig-session",
          };
        },
      });

      return {
        hasRecent,
        cooldownRemainingPositive: Number(cooldown?.remainingMs || 0) > 0,
        activeAcceptedCount: activeResult.summary.accepted.length,
        activeSignerPubkey: activeResult.signerPubkey,
        fallbackAcceptedCount: fallbackResult.summary.accepted.length,
        fallbackSignerPubkey: fallbackResult.signerPubkey,
        fallbackSignCalls,
        publishCallCount: publishCalls.length,
      };
    }, { actorA: HEX_A, actorB: HEX_B });

    expect(result.hasRecent).toBe(true);
    expect(result.cooldownRemainingPositive).toBe(true);
    expect(result.activeAcceptedCount).toBeGreaterThan(0);
    expect(result.activeSignerPubkey).toBe(HEX_A);
    expect(result.fallbackAcceptedCount).toBeGreaterThan(0);
    expect(result.fallbackSignerPubkey).toBe(HEX_B);
    expect(result.fallbackSignCalls).toBe(1);
    expect(result.publishCallCount).toBeGreaterThanOrEqual(2);
  });

  test("exercises comment publish/list/subscribe and session-actor publish guard", async ({
    page,
  }) => {
    const result = await page.evaluate(async ({ actor }) => {
      const {
        COMMENT_EVENT_KIND,
        publishComment,
        listVideoComments,
        subscribeVideoComments,
      } = await import("/js/nostr/commentEvents.js");

      const relay = "wss://relay.comments";
      const videoEventId = "e".repeat(64);
      const listCalls = [];
      const publishedEvents = [];
      let subEventHandler = null;
      let unsubCalled = false;

      const client = {
        pubkey: actor,
        relays: [relay],
        ensureExtensionPermissions: async () => ({ ok: true }),
        pool: {
          publish(relays, event) {
            publishedEvents.push({ relays, event });
            return {
              on(eventName, handler) {
                if (eventName === "ok") {
                  Promise.resolve().then(() => handler());
                }
              },
            };
          },
          async list(relays, filters) {
            listCalls.push({ relays, filters });
            const match = publishedEvents[0]?.event || null;
            const invalid = {
              id: "invalid-comment-id",
              kind: COMMENT_EVENT_KIND,
              created_at: 1,
              tags: [["e", "not-the-video"]],
              content: "invalid",
              pubkey: actor,
              sig: "s",
            };
            return [match, invalid].filter(Boolean);
          },
          sub(relays, filters) {
            listCalls.push({ relays, filters, type: "sub" });
            return {
              on(eventName, handler) {
                if (eventName === "event") {
                  subEventHandler = handler;
                }
              },
              unsub() {
                unsubCalled = true;
              },
            };
          },
        },
      };

      const signer = {
        signEvent: async (event) => ({
          ...event,
          id: "comment-event-id",
          sig: "comment-event-sig",
        }),
      };

      const publishResult = await publishComment(
        client,
        { videoEventPointer: ["e", videoEventId, relay] },
        {
          content: { text: "coverage comment" },
          additionalTags: [["client", "playwright"]],
        },
        {
          resolveActiveSigner: () => signer,
          shouldRequestExtensionPermissions: () => false,
          DEFAULT_NIP07_PERMISSION_METHODS: [],
        },
      );

      const listedFirst = await listVideoComments(
        client,
        { videoEventPointer: ["e", videoEventId, relay] },
        { forceRefresh: true, relays: [relay] },
      );

      const listCallCountAfterFirst = listCalls.length;
      const listedSecond = await listVideoComments(
        client,
        { videoEventPointer: ["e", videoEventId, relay] },
        { relays: [relay] },
      );
      const listCallCountAfterSecond = listCalls.length;

      const seenIds = [];
      const unsubscribe = subscribeVideoComments(
        client,
        { videoEventPointer: ["e", videoEventId, relay] },
        {
          relays: [relay],
          onEvent: (event) => {
            seenIds.push(event.id);
          },
        },
      );

      await Promise.resolve();
      if (typeof subEventHandler === "function") {
        subEventHandler(publishResult.event);
        subEventHandler({
          id: "mismatch",
          kind: COMMENT_EVENT_KIND,
          created_at: 2,
          tags: [["e", "not-the-video"]],
          pubkey: actor,
          content: "skip",
          sig: "s",
        });
      }
      unsubscribe();

      const blockedClient = {
        pubkey: actor,
        sessionActor: { pubkey: actor, source: "nip46" },
        relays: [relay],
        pool: client.pool,
      };
      const blockedPublishResult = await publishComment(
        blockedClient,
        { videoEventPointer: ["e", videoEventId, relay] },
        { content: "blocked" },
        {
          resolveActiveSigner: () => signer,
          shouldRequestExtensionPermissions: () => false,
          DEFAULT_NIP07_PERMISSION_METHODS: [],
        },
      );

      return {
        publishOk: publishResult.ok,
        publishKind: publishResult.event?.kind,
        listedFirstCount: listedFirst.length,
        listedSecondCount: listedSecond.length,
        usedCacheOnSecondList:
          listCallCountAfterSecond === listCallCountAfterFirst,
        seenIds,
        unsubCalled,
        blockedError: blockedPublishResult.error,
      };
    }, { actor: HEX_C });

    expect(result.publishOk).toBe(true);
    expect(result.publishKind).toBeGreaterThan(0);
    expect(result.listedFirstCount).toBe(1);
    expect(result.listedSecondCount).toBe(1);
    expect(result.usedCacheOnSecondList).toBe(true);
    expect(result.seenIds).toEqual(["comment-event-id"]);
    expect(result.unsubCalled).toBe(true);
    expect(result.blockedError).toBe("session-actor-publish-blocked");
  });

  test("exercises reaction publish/list for active signer and session fallback", async ({
    page,
  }) => {
    const result = await page.evaluate(async ({ actorA, actorB }) => {
      const { publishVideoReaction, listVideoReactions } = await import(
        "/js/nostr/reactionEvents.js"
      );

      const relay = "wss://relay.reactions";
      const videoEventId = "9".repeat(64);
      const listCalls = [];
      const publishedEvents = [];
      let fallbackSignCalls = 0;

      const client = {
        pubkey: actorA,
        relays: [relay],
        sessionActor: null,
        ensureExtensionPermissions: async () => ({ ok: true }),
        ensureSessionActor: async (forceNew = false) => {
          if (!client.sessionActor || forceNew) {
            client.sessionActor = {
              pubkey: forceNew ? actorB : actorA,
              privateKey: "2".repeat(64),
              source: "nip46",
            };
          }
          return client.sessionActor.pubkey;
        },
        pool: {
          publish(relays, event) {
            publishedEvents.push({ relays, event });
            return {
              on(eventName, handler) {
                if (eventName === "ok") {
                  Promise.resolve().then(() => handler());
                }
              },
            };
          },
          async list(relays, filters) {
            listCalls.push({ relays, filters });
            const primary = publishedEvents[0]?.event || null;
            const invalid = {
              id: "invalid-reaction",
              kind: 7,
              created_at: 2,
              tags: [["e", "deadbeef"]],
              pubkey: actorA,
              content: "+",
              sig: "s",
            };
            return [primary, invalid].filter(Boolean);
          },
        },
      };

      const activeResult = await publishVideoReaction(
        client,
        ["e", videoEventId, relay],
        { content: "+" },
        {
          resolveActiveSigner: () => ({
            signEvent: async (event) => ({
              ...event,
              id: "reaction-active-id",
              sig: "reaction-active-sig",
            }),
          }),
          shouldRequestExtensionPermissions: () => false,
          signEventWithPrivateKey: () => {
            throw new Error("unexpected-session-fallback");
          },
          DEFAULT_NIP07_PERMISSION_METHODS: [],
        },
      );

      const reactionsFirst = await listVideoReactions(
        client,
        { id: videoEventId },
        { forceRefresh: true, relays: [relay] },
      );
      const listCountAfterFirst = listCalls.length;
      const reactionsSecond = await listVideoReactions(
        client,
        { id: videoEventId },
        { relays: [relay] },
      );
      const listCountAfterSecond = listCalls.length;

      client.pubkey = actorA;
      client.sessionActor = { pubkey: actorB, privateKey: "3".repeat(64), source: "nip46" };
      const fallbackResult = await publishVideoReaction(
        client,
        ["e", videoEventId, relay],
        { content: "🔥" },
        {
          resolveActiveSigner: () => null,
          shouldRequestExtensionPermissions: () => false,
          signEventWithPrivateKey: (event) => {
            fallbackSignCalls += 1;
            return {
              ...event,
              id: "reaction-session-id",
              sig: "reaction-session-sig",
            };
          },
          DEFAULT_NIP07_PERMISSION_METHODS: [],
        },
      );

      return {
        activeOk: activeResult.ok,
        activeAccepted: activeResult.acceptedRelays.length,
        reactionsFirstCount: reactionsFirst.length,
        reactionsSecondCount: reactionsSecond.length,
        usedCacheOnSecondList: listCountAfterSecond === listCountAfterFirst,
        fallbackOk: fallbackResult.ok,
        fallbackSignCalls,
      };
    }, { actorA: HEX_A, actorB: HEX_D });

    expect(result.activeOk).toBe(true);
    expect(result.activeAccepted).toBeGreaterThan(0);
    expect(result.reactionsFirstCount).toBe(1);
    expect(result.reactionsSecondCount).toBe(1);
    expect(result.usedCacheOnSecondList).toBe(true);
    expect(result.fallbackOk).toBe(true);
    expect(result.fallbackSignCalls).toBe(1);
  });

  test("exercises session-actor crypto + storage lifecycle", async ({ page }) => {
    const result = await page.evaluate(async ({ actor }) => {
      const sessionActor = await import("/js/nostr/sessionActor.js");
      const {
        SESSION_ACTOR_STORAGE_KEY,
        encryptSessionPrivateKey,
        decryptSessionPrivateKey,
        normalizeStoredEncryptionMetadata,
        readStoredSessionActorEntry,
        persistSessionActor,
        clearStoredSessionActor,
        isSessionActor,
        __testExports,
      } = sessionActor;

      localStorage.removeItem(SESSION_ACTOR_STORAGE_KEY);

      const passphrase = "correct horse battery staple";
      const privateKey = "f".repeat(64);
      const encrypted = await encryptSessionPrivateKey(privateKey, passphrase);

      const encryptedActor = {
        pubkey: actor,
        privateKeyEncrypted: encrypted.ciphertext,
        encryption: {
          salt: encrypted.salt,
          iv: encrypted.iv,
          iterations: encrypted.iterations,
          hash: encrypted.hash,
          algorithm: encrypted.algorithm,
          version: encrypted.version,
        },
        createdAt: 12345,
      };

      persistSessionActor(encryptedActor);
      const persistedRaw = localStorage.getItem(SESSION_ACTOR_STORAGE_KEY);
      const storedEntry = readStoredSessionActorEntry();
      const decrypted = await decryptSessionPrivateKey(storedEntry, passphrase);

      let wrongPassphraseErrorCode = "";
      try {
        await decryptSessionPrivateKey(storedEntry, "wrong passphrase");
      } catch (error) {
        wrongPassphraseErrorCode = error?.code || "";
      }

      const metadata = normalizeStoredEncryptionMetadata({
        salt: encrypted.salt,
        iv: encrypted.iv,
        iterations: encrypted.iterations,
        hash: encrypted.hash,
        algorithm: encrypted.algorithm,
        version: encrypted.version,
      });
      const invalidMetadata = normalizeStoredEncryptionMetadata({ salt: "", iv: "" });

      localStorage.setItem(
        SESSION_ACTOR_STORAGE_KEY,
        JSON.stringify({
          pubkey: actor,
          privateKey: "legacy-plaintext-key",
          createdAt: 42,
        }),
      );
      // A legacy plaintext entry must be PURGED, not honored. readV1Entry()
      // removes it from storage; readStoredSessionActorEntry() then falls back
      // to the sole remaining (encrypted) account, so the old `=== null`
      // assertion no longer describes the security property -- it just happened
      // to hold before 8692dac6 added per-account storage. Assert the property
      // directly instead: no plaintext key survives, in the returned entry or
      // in raw storage.
      const migratedLegacyEntry = readStoredSessionActorEntry();
      const legacyRaw = localStorage.getItem(SESSION_ACTOR_STORAGE_KEY);
      let legacyRawPlaintextSurvives = false;
      try {
        legacyRawPlaintextSurvives = Boolean(legacyRaw && JSON.parse(legacyRaw)?.privateKey);
      } catch (error) {
        legacyRawPlaintextSurvives = false;
      }

      const actorMatch = isSessionActor({
        pubkey: actor,
        sessionActor: { pubkey: actor, source: "nip46" },
      });
      const actorMismatch = isSessionActor({
        pubkey: actor,
        sessionActor: { pubkey: "0".repeat(64), source: "nip46" },
      });
      const nsecActor = isSessionActor({
        pubkey: actor,
        sessionActor: { pubkey: actor, source: "nsec" },
      });

      const randomBytes = __testExports.generateRandomBytes(8);
      const base64 = __testExports.arrayBufferToBase64(randomBytes);
      const roundtripBytes = __testExports.base64ToUint8Array(base64);
      const subtleAvailable = __testExports.isSubtleCryptoAvailable();

      clearStoredSessionActor();
      const clearedRaw = localStorage.getItem(SESSION_ACTOR_STORAGE_KEY);
      await __testExports._closeSessionActorDb();

      return {
        persistedRawExists: typeof persistedRaw === "string" && persistedRaw.length > 0,
        storedEntryHasCiphertext:
          typeof storedEntry?.privateKeyEncrypted === "string" &&
          storedEntry.privateKeyEncrypted.length > 0,
        decryptedMatches: decrypted === privateKey,
        wrongPassphraseErrorCode,
        metadataValid: metadata && metadata.salt === encrypted.salt,
        metadataInvalidIsNull: invalidMetadata === null,
        migratedLegacyEntryHasPlaintextKey:
          typeof (migratedLegacyEntry as any)?.privateKey === "string" &&
          (migratedLegacyEntry as any).privateKey.length > 0,
        legacyRawPlaintextSurvives,
        actorMatch,
        actorMismatch,
        nsecActor,
        randomBytesLength: randomBytes.length,
        roundtripBytesLength: roundtripBytes?.length || 0,
        subtleAvailable,
        clearedRaw,
      };
    }, { actor: HEX_B });

    expect(result.persistedRawExists).toBe(true);
    expect(result.storedEntryHasCiphertext).toBe(true);
    expect(result.decryptedMatches).toBe(true);
    expect(result.wrongPassphraseErrorCode).toBe("decrypt-failed");
    expect(result.metadataValid).toBeTruthy();
    expect(result.metadataInvalidIsNull).toBe(true);
    expect(result.migratedLegacyEntryHasPlaintextKey).toBe(false);
    expect(result.legacyRawPlaintextSurvives).toBe(false);
    expect(result.actorMatch).toBe(true);
    expect(result.actorMismatch).toBe(false);
    expect(result.nsecActor).toBe(false);
    expect(result.randomBytesLength).toBe(8);
    expect(result.roundtripBytesLength).toBe(8);
    expect(result.subtleAvailable).toBe(true);
    expect(result.clearedRaw).toBeNull();
  });

  test("exercises publish helper repost/mirror/rebroadcast/revert flows", async ({
    page,
  }) => {
    const result = await page.evaluate(async ({ actorA, actorB }) => {
      const {
        repostEvent,
        mirrorVideoEvent,
        rebroadcastEvent,
        buildRevertVideoPayload,
      } = await import("/js/nostr/publishHelpers.js");

      const relayPublish = "wss://relay.publish";
      const relaySource = "wss://relay.source";
      const eventId = "1".repeat(64);
      const dTag = "video-root-1";
      const author = actorB;

      const rawEvent = {
        id: eventId,
        pubkey: author,
        kind: 30078,
        created_at: 10,
        tags: [["d", dTag], ["title", "Test Video"]],
        content: JSON.stringify({
          version: 3,
          title: "Test Video",
          url: "https://example.com/video.mp4",
          videoRootId: dTag,
          mode: "live",
        }),
        relay: relaySource,
      };

      const videoEvent = {
        id: eventId,
        pubkey: author,
        kind: 30078,
        title: "Test Video",
        url: "https://example.com/video.mp4",
        magnet: "magnet:?xt=urn:btih:" + "f".repeat(40),
        thumbnail: "https://example.com/thumb.jpg",
        description: "desc",
        videoRootId: dTag,
        pointerInfo: { eventRelay: relaySource },
      };

      const publishCalls = [];
      const client = {
        pubkey: actorA,
        relays: [relayPublish],
        writeRelays: [relayPublish],
        allEvents: new Map([[eventId, videoEvent]]),
        rawEvents: new Map([[eventId, rawEvent]]),
        ensurePool: async () => client.pool,
        ensureSessionActor: async () => actorA,
        fetchRawEventById: async () => rawEvent,
        countEventsAcrossRelays: async () => ({ total: 0 }),
        pool: {
          publish(relays, event) {
            publishCalls.push({ relays, event });
            return {
              on(eventName, handler) {
                if (eventName === "ok") {
                  Promise.resolve().then(() => handler());
                }
              },
            };
          },
        },
      };

      const signer = {
        signEvent: async (event) => ({
          ...event,
          id: `${event.kind}-signed`,
          sig: `${event.kind}-sig`,
        }),
      };

      const repostOk = await repostEvent({
        client,
        eventId,
        options: {},
        resolveActiveSigner: () => signer,
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: (event) => ({
          ...event,
          id: "fallback-repost",
          sig: "fallback-repost-sig",
        }),
        eventToAddressPointer: () => `30078:${author}:${dTag}`,
      });

      const repostInvalid = await repostEvent({
        client,
        eventId: "",
        options: {},
        resolveActiveSigner: () => signer,
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: (event) => event,
        eventToAddressPointer: () => "",
      });

      const mirrorInvalidSha = await mirrorVideoEvent({
        client,
        eventId,
        options: {
          fileSha256: "zz-invalid-sha",
        },
        resolveActiveSigner: () => signer,
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: (event) => event,
        inferMimeTypeFromUrl: () => "video/mp4",
      });

      const mirrorOk = await mirrorVideoEvent({
        client,
        eventId,
        options: {
          url: "https://example.com/video.mp4",
          fileSha256: "a".repeat(64),
          originalFileSha256: "b".repeat(64),
          additionalTags: [["client", "playwright"]],
        },
        resolveActiveSigner: () => signer,
        shouldRequestExtensionPermissions: () => false,
        signEventWithPrivateKey: (event) => ({
          ...event,
          id: "mirror-fallback",
          sig: "mirror-fallback-sig",
        }),
        inferMimeTypeFromUrl: () => "video/mp4",
      });

      const rebroadcastOk = await rebroadcastEvent({
        client,
        eventId,
        options: {
          relays: [relayPublish],
          rawEvent,
        },
      });

      const rebroadcastCooldown = await rebroadcastEvent({
        client,
        eventId,
        options: {
          relays: [relayPublish],
          rawEvent,
        },
      });

      const clientCountPresent = {
        ...client,
        countEventsAcrossRelays: async () => ({ total: 2 }),
      };
      const rebroadcastAlreadyPresent = await rebroadcastEvent({
        client: clientCountPresent,
        eventId: "2".repeat(64),
        options: {
          relays: [relayPublish],
          rawEvent: { ...rawEvent, id: "2".repeat(64) },
        },
      });

      const clientNotFound = {
        ...client,
        rawEvents: new Map(),
        fetchRawEventById: async () => null,
      };
      const rebroadcastMissing = await rebroadcastEvent({
        client: clientNotFound,
        eventId: "3".repeat(64),
        options: {
          relays: [relayPublish],
        },
      });

      const revertPayload = buildRevertVideoPayload({
        baseEvent: rawEvent,
        originalEventId: eventId,
        pubkey: actorA,
        existingD: dTag,
        stableDTag: dTag,
      });

      return {
        repostOk: repostOk.ok,
        repostKind: repostOk.event?.kind,
        repostInvalidError: repostInvalid.error,
        mirrorInvalidShaError: mirrorInvalidSha.error,
        mirrorOk: mirrorOk.ok,
        mirrorKind: mirrorOk.event?.kind,
        rebroadcastOk: rebroadcastOk.ok,
        rebroadcastHasSummary: Array.isArray(rebroadcastOk?.summary?.accepted),
        rebroadcastCooldownError: rebroadcastCooldown.error,
        rebroadcastAlreadyPresent: rebroadcastAlreadyPresent.alreadyPresent === true,
        rebroadcastMissingError: rebroadcastMissing.error,
        revertDeleted: Boolean(
          (() => {
            try {
              const parsed = JSON.parse(revertPayload.content || "{}");
              return parsed.deleted === true;
            } catch {
              return false;
            }
          })(),
        ),
        publishCalls: publishCalls.length,
      };
    }, { actorA: HEX_A, actorB: HEX_B });

    expect(result.repostOk).toBe(true);
    expect(result.repostKind).toBeGreaterThan(0);
    expect(result.repostInvalidError).toBe("invalid-event-id");
    expect(result.mirrorInvalidShaError).toBe("invalid-file-sha");
    expect(result.mirrorOk).toBe(true);
    expect(result.mirrorKind).toBeGreaterThan(0);
    expect(result.rebroadcastOk).toBe(true);
    expect(result.rebroadcastHasSummary).toBe(true);
    expect(result.rebroadcastCooldownError).toBe("cooldown-active");
    expect(result.rebroadcastAlreadyPresent).toBe(true);
    expect(result.rebroadcastMissingError).toBe("event-not-found");
    expect(result.revertDeleted).toBe(true);
    expect(result.publishCalls).toBeGreaterThan(0);
  });
});