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// Test that top and latency histogram statistics are recorded for views.
//
// This test attempts to perform write operations and get latency statistics using the $collStats
// stage. The former operation must be routed to the primary in a replica set, whereas the latter
// may be routed to a secondary.
//
// @tags: [
// assumes_read_preference_unchanged,
//
// # top command is not available on embedded
// incompatible_with_embedded,
// ]
(function() {
"use strict";
load("jstests/libs/stats.js");
let viewsDB = db.getSiblingDB("views_stats");
assert.commandWorked(viewsDB.dropDatabase());
assert.commandWorked(viewsDB.runCommand({create: "view", viewOn: "collection"}));
let view = viewsDB["view"];
let coll = viewsDB["collection"];
// Check the histogram counters.
let lastHistogram = getHistogramStats(view);
view.aggregate([{$match: {}}]);
lastHistogram = assertHistogramDiffEq(view, lastHistogram, 1, 0, 0);
// Check that failed inserts, updates, and deletes are counted.
assert.writeError(view.insert({}));
lastHistogram = assertHistogramDiffEq(view, lastHistogram, 0, 1, 0);
assert.writeError(view.remove({}));
lastHistogram = assertHistogramDiffEq(view, lastHistogram, 0, 1, 0);
assert.writeError(view.update({}, {}));
lastHistogram = assertHistogramDiffEq(view, lastHistogram, 0, 1, 0);
let isMasterResponse = assert.commandWorked(viewsDB.runCommand("isMaster"));
const isMongos = (isMasterResponse.msg === "isdbgrid");
if (isMongos) {
jsTest.log("Tests are being run on a mongos; skipping top tests.");
return;
}
// Check the top counters.
let lastTop = getTop(view);
view.aggregate([{$match: {}}]);
lastTop = assertTopDiffEq(view, lastTop, "commands", 1);
assert.writeError(view.insert({}));
lastTop = assertTopDiffEq(view, lastTop, "insert", 1);
assert.writeError(view.remove({}));
lastTop = assertTopDiffEq(view, lastTop, "remove", 1);
assert.writeError(view.update({}, {}));
lastTop = assertTopDiffEq(view, lastTop, "update", 1);
// Check that operations on the backing collection do not modify the view stats.
lastTop = getTop(view);
lastHistogram = getHistogramStats(view);
assert.writeOK(coll.insert({}));
assert.writeOK(coll.update({}, {$set: {x: 1}}));
coll.aggregate([{$match: {}}]);
assert.writeOK(coll.remove({}));
assertTopDiffEq(view, lastTop, "insert", 0);
assertTopDiffEq(view, lastTop, "update", 0);
assertTopDiffEq(view, lastTop, "remove", 0);
assertHistogramDiffEq(view, lastHistogram, 0, 0, 0);
}());
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