message: Use assert to avoid !
diff: @@ -511,8 +511,8 @@ describe("RestClient", () => {
  // query by one key
  const raw = await client.queryContractRaw(contractAddress!, expectedKey);
  - expect(raw).not.toBeNull();
  - const model = JSON.parse(fromAscii(raw!));
  + assert(raw, "must get result");
  + const model = JSON.parse(fromAscii(raw));
  expect(model.verifier).toBeDefined();
  expect(model.beneficiary).toBeDefined();
  