1 files changed, 23 insertions, 0 deletions
diff --git a/toolkit/components/uniffi-fixtures/callbacks/src/lib.rs b/toolkit/components/uniffi-fixtures/callbacks/src/lib.rs
new file mode 100644
index 0000000000..9ada66bca5
--- /dev/null
+++ b/toolkit/components/uniffi-fixtures/callbacks/src/lib.rs
@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+trait Logger {
+    fn log(&self, message: String);
+    fn finished(&self);
+}
+
+fn log_even_numbers(logger: Box<dyn Logger>, items: Vec<i32>) {
+    for i in items {
+        if i % 2 == 0 {
+            logger.log(format!("Saw even number: {i}"))
+        }
+    }
+    logger.finished();
+}
+
+fn log_even_numbers_main_thread(logger: Box<dyn Logger>, items: Vec<i32>) {
+    log_even_numbers(logger, items)
+}
+
+include!(concat!(env!("OUT_DIR"), "/callbacks.uniffi.rs"));