SERVER-39669 Support creating index builds with unknown options

1 files changed, 42 insertions, 0 deletions

diff --git a/jstests/core/create_indexes_with_unknown_field_names.js b/jstests/core/create_indexes_with_unknown_field_names.js
new file mode 100644
index 00000000000..2537a486157
--- /dev/null
+++ b/jstests/core/create_indexes_with_unknown_field_names.js
@@ -0,0 +1,42 @@
+/**
+ * Tests that we can have unknown field names in the index spec passed to the createIndexes command
+ * if 'ignoreUnknownIndexSpecFields: true' is set on the createIndexes command.
+ */
+(function() {
+    "use strict";
+
+    db.unknown_field_names_create_indexes.drop();
+    assert.commandFailedWithCode(db.runCommand({
+        createIndexes: "unknown_field_names_create_indexes",
+        indexes: [{key: {x: 1}, name: "myindex", someField: "someValue"}]
+    }),
+                                 ErrorCodes.InvalidIndexSpecificationOption);
+
+    assert.commandFailedWithCode(db.runCommand({
+        createIndexes: "unknown_field_names_create_indexes",
+        indexes: [{key: {x: 1}, name: "myindex", someField: "someValue"}],
+        ignoreUnknownIndexSpecFields: false
+    }),
+                                 ErrorCodes.InvalidIndexSpecificationOption);
+
+    assert.commandFailedWithCode(db.runCommand({
+        createIndexes: "unknown_field_names_create_indexes",
+        indexes: [{key: {x: 1}, name: "myindex", someField: "someValue"}],
+        ignoreUnknownIndexSpecFields: "badValue"
+    }),
+                                 ErrorCodes.TypeMismatch);
+
+    assert.commandWorked(db.runCommand({
+        createIndexes: "unknown_field_names_create_indexes",
+        indexes: [{key: {x: 1}, name: "myindex", someField: "someValue"}],
+        ignoreUnknownIndexSpecFields: true
+    }));
+
+    // Make sure 'someField' is not in the index spec.
+    let indexes = db.unknown_field_names_create_indexes.getIndexes();
+    for (let index in indexes) {
+        if (0 === bsonWoCompare(indexes[index].key, {x: 1})) {
+            assert.eq(indexes[index].someField, undefined);
+        }
+    }
+})();