1 files changed, 45 insertions, 0 deletions
diff --git a/src/mongo/gotools/test/qa-tests/jstests/stat/stat_mixed_storage_engine.js b/src/mongo/gotools/test/qa-tests/jstests/stat/stat_mixed_storage_engine.js
new file mode 100644
index 00000000000..56c5a10d30d
--- /dev/null
+++ b/src/mongo/gotools/test/qa-tests/jstests/stat/stat_mixed_storage_engine.js
@@ -0,0 +1,45 @@
+// @tags: [requires_mmap_available]
+(function() {
+  if (TestData && TestData.storageEngine === 'wiredTiger') {
+    return;
+  }
+  load("jstests/libs/mongostat.js");
+  load('jstests/libs/extended_assert.js');
+  var assert = extendedAssert;
+
+  var mmap_options = {storageEngine: "mmapv1"};
+  var wt_options = {storageEngine: "wiredTiger"};
+  var replTest = new ReplSetTest({
+    nodes: {
+      node0: mmap_options,
+      node1: mmap_options,
+      node2: wt_options,
+    },
+  });
+
+  replTest.startSet();
+  replTest.initiate();
+  replTest.awaitReplication();
+
+  clearRawMongoProgramOutput();
+  assert(discoverTest(replTest.ports, replTest.nodes[0].host), "mongostat against a heterogenous storage engine replica set sees all hosts");
+
+  clearRawMongoProgramOutput();
+  runMongoProgram("mongostat", "--host", replTest.nodes[0].host, "--rowcount", 7, "--discover");
+  assert.strContains.soon("used flushes mapped", rawMongoProgramOutput, "against replset has fields for both engines");
+
+  replTest.stopSet();
+
+  st = new ShardingTest({shards: [wt_options, mmap_options], options: {nopreallocj: true}});
+  stdb = st.getDB("test");
+  shardPorts = [st._mongos[0].port, st._connections[0].port, st._connections[1].port];
+
+  clearRawMongoProgramOutput();
+  assert(discoverTest(shardPorts, st._mongos[0].host, "mongostat reports on a heterogenous storage engine sharded cluster"));
+
+  clearRawMongoProgramOutput();
+  runMongoProgram("mongostat", "--host", st._mongos[0].host, "--rowcount", 7, "--discover");
+  assert.strContains.soon("used flushes mapped", rawMongoProgramOutput, "against sharded cluster has fields for both engines");
+
+  st.stop();
+}());