SERVER-40660 Ensure multiple indexes via createIndexes() cannot bypass index limits

jstests/noPassthroughWithMongod/index_limits_not_bypassed.js

@@ -0,0 +1,38 @@
+/**
+ * Ensures that we cannot bypass the 64 index limit or the 1 text index limit per collection using
+ * the 'createIndexes()' command to create multiple indexes in one request.
+ */
+(function() {
+    "use strict";
+
+    const collName = "index_limits_not_bypassed";
+    const coll = db.getCollection(collName);
+    coll.drop();
+
+    // A single collection can have no more than 64 indexes. We'll create 62 indexes here to
+    // have a total of 63 indexes (the _id index and the 62 about to be created).
+    for (let index = 0; index < 62; index++) {
+        let spec = {};
+        spec[index] = 1;
+        assert.commandWorked(coll.createIndex(spec));
+    }
+
+    let indexes = db.runCommand({listIndexes: collName});
+    assert.eq(63, indexes.cursor.firstBatch.length);
+
+    // Creating multiple indexes via 'createIndexes()' shouldn't bypass index limits.
+    assert.commandFailedWithCode(coll.createIndexes([{x: 1}, {y: 1}]),
+                                 ErrorCodes.CannotCreateIndex);
+
+    assert.commandFailedWithCode(coll.dropIndex("x"), ErrorCodes.IndexNotFound);
+    assert.commandFailedWithCode(coll.dropIndex("y"), ErrorCodes.IndexNotFound);
+
+    // Try to create two text indexes at the same time using 'createIndexes()'. The limit for text
+    // indexes is one per collection.
+    assert.commandFailedWithCode(
+        coll.createIndexes([{x: "text", weights: {x: 5}}, {y: "text", weights: {y: 10}}]),
+        ErrorCodes.CannotCreateIndex);
+
+    assert.commandFailedWithCode(coll.dropIndex("x"), ErrorCodes.IndexNotFound);
+    assert.commandFailedWithCode(coll.dropIndex("y"), ErrorCodes.IndexNotFound);
+}());