1 files changed, 28 insertions, 0 deletions
diff --git a/jstests/core/index_bigkeys_validation.js b/jstests/core/index_bigkeys_validation.js
new file mode 100644
index 00000000000..88e2816fc8d
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+++ b/jstests/core/index_bigkeys_validation.js
@@ -0,0 +1,28 @@
+// Tests that index validation succeeds for long keys when failIndexKeyTooLong is set to false.
+// See: SERVER-22234
+'use strict';
+
+(function() {
+    var coll = db.longindex;
+    coll.drop();
+
+    var longVal = new Array(1025).join('x'); // Keys >= 1024 bytes cannot be indexed.
+
+    assert.commandWorked(db.adminCommand({setParameter: 1, failIndexKeyTooLong: false}));
+
+    assert.writeOK(coll.insert({_id: longVal}));
+    // Verify that validation succeeds when the failIndexKeyTooLong parameter is set to false,
+    // even when there are fewer index keys than documents.
+    var res = coll.validate({full: true, scandata: true});
+    assert.commandWorked(res);
+    assert(res.valid, tojson(res));
+
+    // Change failIndexKeyTooLong back to the default value.
+    assert.commandWorked(db.adminCommand({setParameter: 1, failIndexKeyTooLong: true}));
+
+    // Verify that validation fails when the failIndexKeyTooLong parameter is
+    // reverted to its old value and there are mismatched index keys and documents.
+    res = coll.validate({full: true, scandata: true});
+    assert.commandWorked(res);
+    assert.eq(res.valid, false, tojson(res));
+})();