mongodb/jstests/noPassthrough/currentop_includes_await_time.js

/**
 * Test that the operation latencies reported in current op for a getMore on an awaitData cursor
 * include time spent blocking for the await time.
 * @tags: [requires_capped]
 */

// This test runs a getMore in a parallel shell, which will not inherit the implicit session of
// the cursor establishing command.
TestData.disableImplicitSessions = true;

const conn = MongoRunner.runMongod({});
assert.neq(null, conn, "mongod was unable to start up");
const testDB = conn.getDB("test");
const coll = testDB.currentop_includes_await_time;

coll.drop();
assert.commandWorked(testDB.createCollection(coll.getName(), {capped: true, size: 1024}));
assert.commandWorked(coll.insert({_id: 1}));

let cmdRes = assert.commandWorked(
    testDB.runCommand({find: coll.getName(), tailable: true, awaitData: true}));

TestData.commandResult = cmdRes;
let cleanupShell = startParallelShell(function() {
    db.getSiblingDB("test").runCommand({
        getMore: TestData.commandResult.cursor.id,
        collection: "currentop_includes_await_time",
        maxTimeMS: 5 * 60 * 1000,
    });
}, conn.port);

assert.soon(function() {
    // This filter ensures that the getMore 'secs_running' and 'microsecs_running' fields are
    // sufficiently large that they appear to include time spent blocking waiting for capped
    // inserts.
    let ops = testDB.currentOp({
        "command.getMore": {$exists: true},
        "ns": coll.getFullName(),
        secs_running: {$gte: 2},
        microsecs_running: {$gte: 2 * 1000 * 1000}
    });
    return ops.inprog.length === 1;
}, printjson(testDB.currentOp()));

// A capped insertion should unblock the getMore, allowing the test to complete before the
// getMore's awaitData time expires.
assert.commandWorked(coll.insert({_id: 2}));

cleanupShell();
MongoRunner.stopMongod(conn);