1 files changed, 55 insertions, 0 deletions
diff --git a/testing/web-platform/tests/IndexedDB/transaction-scheduling-within-database.any.js b/testing/web-platform/tests/IndexedDB/transaction-scheduling-within-database.any.js
new file mode 100644
index 0000000000..a9a20bae3a
--- /dev/null
+++ b/testing/web-platform/tests/IndexedDB/transaction-scheduling-within-database.any.js
@@ -0,0 +1,55 @@
+// META: script=resources/support.js
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store');
+    store.put('value', 'key');
+  },
+
+  (t, db) => {
+    let transaction1GetSuccess = false;
+    let transaction2GetSuccess = false;
+
+    const onTransactionComplete = barrier_func(2, t.step_func_done(() => {
+      assert_true(transaction1GetSuccess,
+                  'transaction1 should have executed at least one request');
+      assert_true(transaction2GetSuccess,
+                  'transaction1 should have executed at least one request');
+    }));
+
+    const transaction1 = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    transaction1.onabort = t.unreached_func('transaction1 should not abort');
+    transaction1.oncomplete = t.step_func(onTransactionComplete);
+
+    const transaction2 = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    transaction2.onabort = t.unreached_func('transaction2 should not abort');
+    transaction2.oncomplete = t.step_func(onTransactionComplete);
+
+    // Keep both transactions alive until each has reported at least one
+    // successful operation
+
+    function doTransaction1Get() {
+      const request = transaction1.objectStore('store').get('key');
+      request.onerror = t.unreached_func('request should not fail');
+      request.onsuccess = t.step_func(() => {
+        transaction1GetSuccess = true;
+        if (!transaction2GetSuccess)
+          doTransaction1Get();
+      });
+    }
+
+    function doTransaction2Get() {
+      // NOTE: No logging since execution order is not deterministic.
+      const request = transaction2.objectStore('store').get('key');
+      request.onerror = t.unreached_func('request should not fail');
+      request.onsuccess = t.step_func(() => {
+        transaction2GetSuccess = true;
+        if (!transaction1GetSuccess)
+          doTransaction2Get();
+      });
+    }
+
+    doTransaction1Get();
+    doTransaction2Get();
+  },
+  'Check that read-only transactions within a database can run in parallel.');