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/**
* Checks that top removes entries after dropping a collection or database.
* TODO(SERVER-21167): Move this test from noPassthrough to core.
*/
(function() {
"use strict";
let topDB = db.getSiblingDB("topdrop");
assert.commandWorked(topDB.dropDatabase());
// Asserts that the output of top contains exactly these collection entries for topDB.
function checkTopEntries(expectedEntries) {
let res = topDB.adminCommand("top");
assert.commandWorked(res, "Failed to run the top command");
let entriesInTop = Object.keys(res.totals).filter(function(ns) {
// This filter only includes non-system collections in our test database.
const dbPrefix = topDB.getName() + ".";
const systemCollectionPrefix = "system.";
return ns.startsWith(dbPrefix) && !ns.startsWith(dbPrefix + systemCollectionPrefix);
});
let expectedEntryNames = expectedEntries.map(function(coll) {
return coll.getFullName();
});
const entriesAreEqual = friendlyEqual(entriesInTop.sort(), expectedEntryNames.sort());
if (!entriesAreEqual) {
// TODO(SERVER-26750): This block can be removed once SERVER-26750 is resolved.
jsTest.log("Warning: expected to see " + tojson(expectedEntryNames) + " in top, but got " +
tojson(entriesInTop));
assert.lt(expectedEntryNames.length,
entriesInTop.length,
"Fewer entries in top than expected; got " + tojson(entriesInTop) +
" but expected " + tojson(expectedEntryNames) + "\nFull top output:\n" +
tojson(res.totals));
// We allow an unexpected entry in top if the insert counter has been cleared. This is
// probably due to a background job releasing an AutoGetCollectionForReadCommand for
// that collection.
entriesInTop.forEach(function(coll) {
if (expectedEntryNames.includes(coll)) {
return;
}
let topStats = res.totals[coll];
assert.eq(0,
res.totals[coll].insert.count,
coll + " has unexpected insert entries in top. Full top output:\n" +
tojson(res.totals));
});
}
}
// Create a few entries in top.
assert.writeOK(topDB.coll1.insert({}));
assert.writeOK(topDB.coll2.insert({}));
assert.writeOK(topDB.coll3.insert({}));
checkTopEntries([topDB.coll1, topDB.coll2, topDB.coll3]);
// Check that dropping a collection removes that collection but leaves the others.
assert.commandWorked(topDB.runCommand({drop: "coll3"}));
checkTopEntries([topDB.coll1, topDB.coll2]);
// Check that dropping the database removes the remaining collections.
assert.commandWorked(topDB.dropDatabase());
checkTopEntries([]);
// Check that top doesn't keep state about non-existent collections.
assert.commandWorked(topDB.dropDatabase());
topDB.foo.find().itcount();
topDB.baz.update({}, {$set: {a: 1}});
topDB.bar.remove({});
let res = topDB.adminCommand("top");
checkTopEntries([]);
assert.commandWorked(topDB.dropDatabase());
}());
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