SERVER-57178 add js test for verifying in-memory paths for compound multikey index

This test updates multikey paths for multiple indexed fields in a compound index
using different documents inserted within the same storage transaction, before
running a full validation to ensure the in-memory paths are correctly updated to
provided the necessary coverage for queries.

(cherry picked from commit de1fa178269c8cc55ad2012a786074c1d32109a9)

1 files changed, 53 insertions, 0 deletions

diff --git a/jstests/noPassthrough/validate_multikey_compound_batch.js b/jstests/noPassthrough/validate_multikey_compound_batch.js
new file mode 100644
index 00000000000..2a36cafb4a9
--- /dev/null
+++ b/jstests/noPassthrough/validate_multikey_compound_batch.js
@@ -0,0 +1,53 @@
+/**
+ * Validates multikey compound index in a collection with a single insert command
+ * containing documents that update different paths in the multikey index.
+ *
+ * @tags: [
+ *     requires_replication,
+ * ]
+ */
+(function() {
+'use strict';
+
+const rst = new ReplSetTest({nodes: 1});
+rst.startSet();
+rst.initiate();
+
+let primary = rst.getPrimary();
+let testColl = primary.getCollection('test.validate_multikey_compound_batch');
+
+assert.commandWorked(testColl.getDB().createCollection(testColl.getName()));
+
+assert.commandWorked(testColl.createIndex({a: 1, b: 1}));
+
+// Insert 2 documents. Only the first and last documents are valid.
+assert.commandWorked(
+    testColl.insert([{_id: 0, a: [1, 2, 3], b: 'abc'}, {_id: 1, a: 456, b: ['d', 'e', 'f']}]));
+
+jsTestLog('Checking documents in collection');
+let docs = testColl.find().sort({_id: 1}).toArray();
+assert.eq(2, docs.length, 'too many docs in collection: ' + tojson(docs));
+assert.eq(0, docs[0]._id, 'unexpected document content in collection: ' + tojson(docs));
+assert.eq(1, docs[1]._id, 'unexpected document content in collection: ' + tojson(docs));
+
+jsTestLog('Validating collection');
+const result = assert.commandWorked(testColl.validate({full: true}));
+
+jsTestLog('Validation result: ' + tojson(result));
+assert.eq(testColl.getFullName(), result.ns, tojson(result));
+assert.eq(0, result.nInvalidDocuments, tojson(result));
+assert.eq(2, result.nrecords, tojson(result));
+assert.eq(2, result.nIndexes, tojson(result));
+
+// Check non-multikey indexes.
+assert.eq(2, result.keysPerIndex._id_, tojson(result));
+assert(result.indexDetails._id_.valid, tojson(result));
+
+// Check multikey index.
+assert.eq(6, result.keysPerIndex.a_1_b_1, tojson(result));
+assert(result.indexDetails.a_1_b_1.valid, tojson(result));
+
+assert(result.valid, tojson(result));
+
+rst.stopSet();
+})();