1 files changed, 99 insertions, 0 deletions
diff --git a/testing/web-platform/tests/IndexedDB/idbindex-cross-realm-methods.html b/testing/web-platform/tests/IndexedDB/idbindex-cross-realm-methods.html
new file mode 100644
index 0000000000..1e431d3772
--- /dev/null
+++ b/testing/web-platform/tests/IndexedDB/idbindex-cross-realm-methods.html
@@ -0,0 +1,99 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Cross-realm IDBIndex methods from detached iframe work as expected</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=resources/support.js></script>
+
+<body>
+<script>
+"use strict";
+const INDEX_LOWER = 1000;
+const INDEX_UPPER = 1001;
+const INDEX_RANGE = IDBKeyRange.bound(INDEX_LOWER, INDEX_UPPER);
+
+const testCases = [
+    {
+        methodName: "get",
+        arguments: [INDEX_LOWER],
+        validateResult: e => {
+            assert_equals(e.target.result.indexedKey, INDEX_LOWER);
+        },
+    },
+    {
+        methodName: "getKey",
+        arguments: [INDEX_UPPER],
+        validateResult: e => {
+            assert_equals(e.target.result, INDEX_UPPER);
+        },
+    },
+    {
+        methodName: "getAll",
+        arguments: [INDEX_RANGE],
+        validateResult: e => {
+            assert_array_equals(e.target.result.map(v => v.indexedKey), [INDEX_LOWER, INDEX_UPPER]);
+        },
+    },
+    {
+        methodName: "getAllKeys",
+        arguments: [INDEX_RANGE],
+        validateResult: e => {
+            assert_array_equals(e.target.result, [INDEX_LOWER, INDEX_UPPER]);
+        },
+    },
+    {
+        methodName: "count",
+        arguments: [INDEX_RANGE],
+        validateResult: e => {
+            assert_equals(e.target.result, 2);
+        },
+    },
+    {
+        methodName: "openCursor",
+        arguments: [],
+        validateResult: e => {
+            const cursor = e.target.result;
+            assert_true(cursor instanceof IDBCursor);
+            assert_equals(cursor.value.indexedKey, INDEX_LOWER);
+        },
+    },
+    {
+        methodName: "openKeyCursor",
+        arguments: [],
+        validateResult: e => {
+            const cursor = e.target.result;
+            assert_true(cursor instanceof IDBCursor);
+            assert_equals(cursor.key, INDEX_LOWER);
+        },
+    },
+];
+
+for (const testCase of testCases) {
+    async_test(t => {
+        const iframe = document.createElement("iframe");
+        iframe.onload = t.step_func(() => {
+            const method = iframe.contentWindow.IDBIndex.prototype[testCase.methodName];
+            iframe.remove();
+
+            let db;
+            const open_rq = createdb(t);
+            open_rq.onupgradeneeded = t.step_func(e => {
+                db = e.target.result;
+                const objectStore = db.createObjectStore("store");
+                objectStore.createIndex("index", "indexedKey");
+                objectStore.add({ indexedKey: INDEX_LOWER }, INDEX_LOWER);
+                objectStore.add({ indexedKey: INDEX_UPPER }, INDEX_UPPER);
+            });
+
+            open_rq.onsuccess = t.step_func(() => {
+                const index = db.transaction("store", "readonly", {durability: 'relaxed'}).objectStore("store").index("index");
+                const rq = method.call(index, ...testCase.arguments);
+                rq.onsuccess = t.step_func_done(e => {
+                    testCase.validateResult(e);
+                });
+            });
+        });
+        document.body.append(iframe);
+    }, `Cross-realm IDBIndex::${testCase.methodName}() method from detached <iframe> works as expected`);
+}
+</script>