Function compareInputToSpec

test/tools/cmap_spec_runner.ts:156–192

(input, expected, message)

 * [CMAP Spec Test README](https://github.com/mongodb/specifications/tree/master/source/connection-monitoring-and-pooling/tests#spec-test-match-function)
 */
const compareInputToSpec = (input, expected, message) => {
  // the spec uses 42 and "42" as special keywords to express that the value does not matter
  // however, "42" does not appear in the spec tests, so only the numeric value is checked here
  if (expected === 42) {
    expect(input, message).not.to.be.undefined;
    expect(input, message).not.to.be.null;
    return;
  }

  if (Array.isArray(expected)) {
    expect(input, message).to.be.an('array');
    for (const [index, expectedValue] of input.entries()) {
      compareInputToSpec(input[index], expectedValue, `${message} at index ${index}`);
    }
    return;
  }

  const expectedEntries: [string, unknown][] = Object.entries(expected).map(([k, v]) => {
    // Node uses `durationMS` instead of `duration` on CMAP events.
    if (k === 'duration') return ['durationMS', v];
    return [k, v];
  });

  if (expected && typeof expected === 'object') {
    for (const [expectedPropName, expectedValue] of expectedEntries) {
      expect(input, message).to.have.property(expectedPropName);
      compareInputToSpec(
        input[expectedPropName],
        expectedValue,
        `${message} property ${expectedPropName}`
      );
    }
    return;
  }

  expect(input, message).to.equal(expected);
};

const getTestOpDefinitions = (threadContext: ThreadContext) => ({
  checkOut: async function (op) {