1 files changed, 87 insertions, 0 deletions
diff --git a/jstests/noPassthrough/cluster_explain_commands_not_supported.js b/jstests/noPassthrough/cluster_explain_commands_not_supported.js
new file mode 100644
index 00000000000..3aa315382e3
--- /dev/null
+++ b/jstests/noPassthrough/cluster_explain_commands_not_supported.js
@@ -0,0 +1,87 @@
+/**
+ * Verify the explaining "cluster" versions of commands is not supported on any mongod
+ *
+ * @tags: [
+ *   requires_replication,
+ *   requires_sharding,
+ * ]
+ */
+(function() {
+"use strict";
+
+const kDbName = "cluster_explain_commands";
+const kCollName = "bar";
+
+const clusterCommandsCases = [
+    {cmd: {explain: {clusterAggregate: kCollName, pipeline: [{$match: {}}], cursor: {}}}},
+    {cmd: {explain: {clusterCount: "x"}}},
+    {cmd: {explain: {clusterFind: kCollName}}},
+    {cmd: {explain: {clusterInsert: kCollName, documents: [{x: 1}]}}},
+    {cmd: {explain: {clusterUpdate: kCollName, updates: [{q: {doesNotExist: 1}, u: {x: 1}}]}}},
+    {cmd: {explain: {clusterDelete: `${kCollName}`, deletes: [{q: {}, limit: 1}]}}}
+];
+
+function runTestCaseExpectFail(conn, testCase, code) {
+    assert.commandFailedWithCode(
+        conn.getDB(kDbName).runCommand(testCase.cmd), code, tojson(testCase.cmd));
+}
+
+//
+// Cluster explain commands not supported on standalone mongods
+//
+{
+    const standalone = MongoRunner.runMongod({});
+    assert(standalone);
+
+    for (let testCase of clusterCommandsCases) {
+        runTestCaseExpectFail(standalone, testCase, ErrorCodes.CommandNotSupported);
+    }
+
+    MongoRunner.stopMongod(standalone);
+}
+
+//
+// Cluster explain commands not supported on replica set mongods
+//
+{
+    const rst = new ReplSetTest({nodes: 1});
+    rst.startSet();
+    rst.initiate();
+
+    for (let testCase of clusterCommandsCases) {
+        runTestCaseExpectFail(rst.getPrimary(), testCase, ErrorCodes.CommandNotSupported);
+    }
+
+    rst.stopSet();
+}
+
+{
+    const st = new ShardingTest({mongos: 1, shards: 1, config: 1});
+
+    //
+    // Cluster explain commands do not exist on mongos.
+    //
+
+    for (let testCase of clusterCommandsCases) {
+        runTestCaseExpectFail(st.s, testCase, ErrorCodes.CommandNotFound);
+    }
+
+    //
+    // Cluster explain commands are not supported on a config server node.
+    //
+
+    for (let testCase of clusterCommandsCases) {
+        runTestCaseExpectFail(st.configRS.getPrimary(), testCase, ErrorCodes.CommandNotSupported);
+    }
+
+    //
+    // Cluster explain commands are not supported sharding enabled shardsvr.
+    //
+
+    for (let testCase of clusterCommandsCases) {
+        runTestCaseExpectFail(st.rs0.getPrimary(), testCase, ErrorCodes.CommandNotSupported);
+    }
+
+    st.stop();
+}
+}());