1 files changed, 53 insertions, 0 deletions
diff --git a/jstests/sharding/global_index_sharding_catalog_collection_upgrade_downgrade.js b/jstests/sharding/global_index_sharding_catalog_collection_upgrade_downgrade.js
new file mode 100644
index 00000000000..3e6a660f594
--- /dev/null
+++ b/jstests/sharding/global_index_sharding_catalog_collection_upgrade_downgrade.js
@@ -0,0 +1,53 @@
+/**
+ * Tests that the global indexes collections are dropped on FCV downgrade and recreated after
+ * upgrading.
+ *
+ * @tags: [multiversion_incompatible, featureFlagGlobalIndexesShardingCatalog]
+ */
+
+(function() {
+'use strict';
+
+const st = new ShardingTest({shards: 1});
+
+const csrsIndexesCollection = 'csrs.indexes';
+const shardIndexesCollection = 'shard.indexes';
+
+const CSRSIndexes = st.configRS.getPrimary()
+                        .getDB('config')
+                        .runCommand({listIndexes: csrsIndexesCollection})
+                        .cursor.firstBatch;
+assert.eq(2, CSRSIndexes.length);
+
+const shardIndexes = st.rs0.getPrimary()
+                         .getDB('config')
+                         .runCommand({listIndexes: shardIndexesCollection})
+                         .cursor.firstBatch;
+assert.eq(2, shardIndexes.length);
+
+st.s.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV});
+
+assert.commandFailedWithCode(
+    st.configRS.getPrimary().getDB('config').runCommand({listIndexes: csrsIndexesCollection}),
+    ErrorCodes.NamespaceNotFound);
+
+assert.commandFailedWithCode(
+    st.rs0.getPrimary().getDB('config').runCommand({listIndexes: shardIndexesCollection}),
+    ErrorCodes.NamespaceNotFound);
+
+st.s.adminCommand({setFeatureCompatibilityVersion: latestFCV});
+
+const afterUpgradeCSRSIndexes = st.configRS.getPrimary()
+                                    .getDB('config')
+                                    .runCommand({listIndexes: csrsIndexesCollection})
+                                    .cursor.firstBatch;
+assert.eq(2, afterUpgradeCSRSIndexes.length);
+
+const afterUpgradeShardIndexes = st.rs0.getPrimary()
+                                     .getDB('config')
+                                     .runCommand({listIndexes: shardIndexesCollection})
+                                     .cursor.firstBatch;
+assert.eq(2, afterUpgradeShardIndexes.length);
+
+st.stop();
+})();