SERVER-31074 Fix dbstats.js to properly detect non-persistent storage engines causing ephemeralForTest to fail.

1 files changed, 8 insertions, 2 deletions

diff --git a/jstests/core/dbstats.js b/jstests/core/dbstats.js
index 00709fa7d77..6289eab1f08 100644
--- a/jstests/core/dbstats.js
+++ b/jstests/core/dbstats.js
@@ -9,9 +9,15 @@
         return res.msg === "isdbgrid";
     }
 
+    function serverUsingPersistentStorage() {
+        const res = db.runCommand("serverStatus");
+        assert.commandWorked(res);
+        return res.storageEngine.persistent === true;
+    }
+
     const isMongoS = serverIsMongos();
     const isMMAPv1 = jsTest.options().storageEngine === "mmapv1";
-    const isInMemory = jsTest.options().storageEngine === "inMemory";
+    const isUsingPersistentStorage = !isMongoS && serverUsingPersistentStorage();
 
     let testDB = db.getSiblingDB("dbstats_js");
     assert.commandWorked(testDB.dropDatabase());
@@ -58,7 +64,7 @@
     assert(dbStats.hasOwnProperty("numExtents"), tojson(dbStats));
     assert(dbStats.hasOwnProperty("indexSize"), tojson(dbStats));
 
-    if (!isMongoS && !isInMemory) {
+    if (isUsingPersistentStorage) {
         assert(dbStats.hasOwnProperty("fsUsedSize"), tojson(dbStats));
         assert(dbStats.hasOwnProperty("fsTotalSize"), tojson(dbStats));
     }