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test(NODE-4479): adjust number of iterations of flakey test #3378

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Merged
merged 4 commits into from
Aug 24, 2022
Merged

test(NODE-4479): adjust number of iterations of flakey test #3378

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a855e2b
test: adjust number of iterations of flakey test
baileympearson Aug 19, 2022
932a818
bump count to 1000
baileympearson Aug 19, 2022
f6c2364
Update server_selection.prose.operation_count.test.ts
baileympearson Aug 24, 2022
0dc8551
chore: fix lint
baileympearson Aug 24, 2022
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16 changes: 12 additions & 4 deletions test/integration/server-selection/server_selection.prose.operation_count.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@ const failPoint = {

const POOL_SIZE = 100;

async function runTaskGroup(collection: Collection, count: 10 | 100) {
async function runTaskGroup(collection: Collection, count: 10 | 100 | 1000) {
for (let i = 0; i < count; ++i) {
await collection.findOne({});
}
Expand Down Expand Up @@ -147,13 +147,21 @@ describe('operationCount-based Selection Within Latency Window - Prose Test', fu
it('equally distributes operations with both hosts are fine', TEST_METADATA, async function () {
const collection = client.db('test-db').collection('collection0');

const numberTaskGroups = 10;
const numberOfTasks = 1000;
const totalNumberOfTasks = numberTaskGroups * numberOfTasks;

// This test has proved flakey, not just for Node. The number of iterations for the test has been increased,
// to prevent the test from failing.
// Step 8: Start 10 concurrent threads / tasks that each run 100 findOne operations with empty filters using that client.
await Promise.all(Array.from({ length: 10 }, () => runTaskGroup(collection, 100)));
await Promise.all(
Array.from({ length: numberTaskGroups }, () => runTaskGroup(collection, numberOfTasks))
);

// Step 9: Using command monitoring events, assert that each mongos was selected roughly 50% of the time (within +/- 10%).
const [host1, host2] = seeds.map(seed => seed.split(':')[1]);
const percentageToHost1 = (counts[host1] / 1000) * 100;
const percentageToHost2 = (counts[host2] / 1000) * 100;
const percentageToHost1 = (counts[host1] / totalNumberOfTasks) * 100;
const percentageToHost2 = (counts[host2] / totalNumberOfTasks) * 100;
expect(percentageToHost1).to.be.greaterThan(40).and.lessThan(60);
expect(percentageToHost2).to.be.greaterThan(40).and.lessThan(60);
});
Expand Down