ci: Fix Postgres flaky tests (#9217)

spec/batch.spec.js

@@ -368,11 +368,11 @@ describe('batch', () => {
  it('should generate separate session for each call', async () => {
  await reconfigureServer();
  const myObject = new Parse.Object('MyObject'); // This is important because transaction only works on pre-existing collections
- await myObject.save();
+ await myObject.save({ key: 'stringField' });
  await myObject.destroy();
 
  const myObject2 = new Parse.Object('MyObject2'); // This is important because transaction only works on pre-existing collections
- await myObject2.save();
+ await myObject2.save({ key: 'stringField' });
  await myObject2.destroy();
  createSpy.calls.reset();
 
@@ -381,6 +381,7 @@ describe('batch', () => {
  myObjectCalls++;
  if (myObjectCalls === 2) {
  try {
+ // Saving a number to a string field should fail
  await request({
  method: 'POST',
  headers: headers,
@@ -547,14 +548,14 @@ describe('batch', () => {
  const results3 = await query3.find();
  expect(results3.map(result => result.get('key')).sort()).toEqual(['value1', 'value2']);
 
- expect(databaseAdapter.createObject.calls.count() >= 13).toEqual(true);
+ expect(createSpy.calls.count() >= 13).toEqual(true);
  let transactionalSession;
  let transactionalSession2;
  let myObjectDBCalls = 0;
  let myObject2DBCalls = 0;
  let myObject3DBCalls = 0;
- for (let i = 0; i < databaseAdapter.createObject.calls.count(); i++) {
- const args = databaseAdapter.createObject.calls.argsFor(i);
+ for (let i = 0; i < createSpy.calls.count(); i++) {
+ const args = createSpy.calls.argsFor(i);
  switch (args[0]) {
  case 'MyObject':
  myObjectDBCalls++;