37 lines
1012 B
JavaScript
37 lines
1012 B
JavaScript
// Tests that $group aggregation works with group key of type ObjectId.
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// @tags: [
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// # Some in memory variants will error because this test uses too much memory. As such, we do not
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// # run this test on in-memory variants.
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// requires_persistence,
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// ]
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const collName = jsTestName();
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const coll = db[collName];
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coll.drop();
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const bigStr = Array(100 * 1000).toString(); // ~ 100KB of ','
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const bigStr2 = bigStr + "2";
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const nDocs = 1000;
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const nGroups = 10;
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let objectIds = [];
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for (let i = 0; i < nGroups; i++) {
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objectIds.push(new ObjectId());
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}
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const bulk = coll.initializeUnorderedBulkOp();
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for (let i = 1; i <= nDocs; i++) {
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bulk.insert({b: objectIds[i % nGroups], bigStr: bigStr, b2: bigStr2, c: i});
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}
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assert.commandWorked(bulk.execute());
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const pipeline = [
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{
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$sort: {
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"c": NumberInt(-1),
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}
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},
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{$group: {"_id": "$b", "doc": {"$first": "$$ROOT"}}},
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];
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assert.commandWorked(db.runCommand({aggregate: collName, pipeline: pipeline, cursor: {}}));
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