SERVER-25136 allow index types which do not support collation on a collection with a non-simple default collation

The application must use {locale: "simple"} to override the
default in this case.

1 files changed, 15 insertions, 0 deletions

diff --git a/jstests/core/collation.js b/jstests/core/collation.js
index ac1ed93d406..bb16e4ab0c4 100644
--- a/jstests/core/collation.js
+++ b/jstests/core/collation.js
@@ -245,6 +245,21 @@
         assert(planHasStage(explainRes.queryPlanner.winningPlan, "IXSCAN"));
     }
 
+    // Should not be possible to create a text index with an explicit non-simple collation.
+    coll.drop();
+    assert.commandFailed(coll.createIndex({a: "text"}, {collation: {locale: "en"}}));
+
+    // Text index builds which inherit a non-simple default collation should fail.
+    coll.drop();
+    assert.commandWorked(db.createCollection(coll.getName(), {collation: {locale: "en"}}));
+    assert.commandFailed(coll.createIndex({a: "text"}));
+
+    // Text index build should succeed on a collection with a non-simple default collation if it
+    // explicitly overrides the default with {locale: "simple"}.
+    coll.drop();
+    assert.commandWorked(db.createCollection(coll.getName(), {collation: {locale: "en"}}));
+    assert.commandWorked(coll.createIndex({a: "text"}, {collation: {locale: "simple"}}));
+
     //
     // Collation tests for aggregation.
     //