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mongo/jstests/libs/feature_compatibility_version.js

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JavaScript

// Contains helpers for checking the featureCompatibilityVersion.
/**
* Checks the featureCompatibilityVersion document and server parameter. The
* featureCompatibilityVersion document is of the form {_id: "featureCompatibilityVersion", version:
* <required>, targetVersion: <optional>}. The getParameter result is of the form
* {featureCompatibilityVersion: {version: <required>, targetVersion: <optional>}, ok: 1}.
*/
function checkFCV(adminDB, version, targetVersion) {
let res = adminDB.runCommand({getParameter: 1, featureCompatibilityVersion: 1});
assert.commandWorked(res);
assert.eq(res.featureCompatibilityVersion.version, version, tojson(res));
assert.eq(res.featureCompatibilityVersion.targetVersion, targetVersion, tojson(res));
let doc = adminDB.system.version.findOne({_id: "featureCompatibilityVersion"});
assert.eq(doc.version, version, tojson(doc));
assert.eq(doc.targetVersion, targetVersion, tojson(doc));
}
/**
* Checks the featureCompatibilityVersion document and server parameter for a 3.4 binary. In 3.4,
* the featureCompatibilityVersion document is of the form {_id: "featureCompatibilityVersion",
* version: <value>}. The getParameter result is of the form {featureCompatibilityVersion: <value>,
* ok: 1}.
*/
function checkFCV34(adminDB, version) {
let res = adminDB.runCommand({getParameter: 1, featureCompatibilityVersion: 1});
assert.commandWorked(res);
assert.eq(res.featureCompatibilityVersion, version, tojson(res));
let doc = adminDB.system.version.findOne({_id: "featureCompatibilityVersion"});
assert.eq(doc.version, version, tojson(doc));
}
/**
* Since SERVER-29453 disallows us to remove the FCV document in 3.6, we need to
* do this hack to remove it. Notice this is only for 3.6. For 3.4, we can
* simply remove the FCV document.
*/
function removeFCVDocument(adminDB) {
let res = adminDB.runCommand({listCollections: 1, filter: {name: "system.version"}});
assert.commandWorked(res, "failed to list collections");
let originalUUID = res.cursor.firstBatch[0].info.uuid;
let newUUID = UUID();
// Create new collection with no FCV document, and then delete the
// original collection.
let createNewAdminSystemVersionCollection =
{op: "c", ns: "admin.$cmd", ui: newUUID, o: {create: "system.version"}};
let dropOriginalAdminSystemVersionCollection =
{op: "c", ns: "admin.$cmd", ui: originalUUID, o: {drop: "admin.tmp_system_version"}};
assert.commandWorked(adminDB.runCommand({
applyOps:
[createNewAdminSystemVersionCollection, dropOriginalAdminSystemVersionCollection]
}));
res = adminDB.runCommand({listCollections: 1, filter: {name: "system.version"}});
assert.commandWorked(res, "failed to list collections");
assert.eq(newUUID, res.cursor.firstBatch[0].info.uuid);
}