SERVER-60058 Add helper library to check for feature flags in jstests

1 files changed, 19 insertions, 0 deletions

diff --git a/jstests/libs/feature_flag_util.js b/jstests/libs/feature_flag_util.js
new file mode 100644
index 00000000000..6f4db466650
--- /dev/null
+++ b/jstests/libs/feature_flag_util.js
@@ -0,0 +1,19 @@
+/**
+ * Utilities for feature flags.
+ */
+var FeatureFlagUtil = class {
+    /**
+     * Returns true if feature flag is enabled, false otherwise.
+     */
+    static isEnabled(db, featureFlag) {
+        return eval(
+            `const admin = db.getSiblingDB("admin");
+            const flagDoc = admin.runCommand({getParameter: 1, featureFlag${featureFlag}: 1});
+            const fcvDoc = admin.runCommand({getParameter: 1, featureCompatibilityVersion: 1});
+            flagDoc.hasOwnProperty("featureFlag${featureFlag}") &&
+                flagDoc.featureFlag${featureFlag}.value &&
+                MongoRunner.compareBinVersions(fcvDoc.featureCompatibilityVersion.version,
+                                            flagDoc.featureFlag${featureFlag}.fcv) >= 0;`
+        );
+    }
+};