1 files changed, 74 insertions, 0 deletions
diff --git a/testing/web-platform/tests/IndexedDB/idbindex_keyPath.any.js b/testing/web-platform/tests/IndexedDB/idbindex_keyPath.any.js
new file mode 100644
index 0000000000..40721462a3
--- /dev/null
+++ b/testing/web-platform/tests/IndexedDB/idbindex_keyPath.any.js
@@ -0,0 +1,74 @@
+// META: title=IndexedDB: IDBIndex keyPath attribute
+// META: script=resources/support.js
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store', {keyPath: ['a', 'b']});
+    store.createIndex('index', ['a', 'b']);
+  },
+  (t, db) => {
+    const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    const store = tx.objectStore('store');
+    const index = store.index('index');
+    assert_equals(typeof index.keyPath, 'object', 'keyPath is an object');
+    assert_true(Array.isArray(index.keyPath), 'keyPath is an array');
+
+    assert_equals(
+      index.keyPath, index.keyPath,
+      'Same object instance is returned each time keyPath is inspected');
+
+    const tx2 = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    const store2 = tx2.objectStore('store');
+    const index2 = store2.index('index');
+
+    assert_not_equals(
+      index.keyPath, index2.keyPath,
+      'Different instances are returned from different index instances.');
+
+    t.done();
+  },
+  `IDBIndex's keyPath attribute returns the same object.`);
+
+  indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store', {autoIncrement: true});
+    store.createIndex('index', ['a']);
+
+    store.add({a: 1, b: 2, c: 3})
+  },
+  (t, db) => {
+    const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    const store = tx.objectStore('store');
+    const index = store.index('index');
+    const cursorReq = index.openCursor();
+
+    cursorReq.onsuccess = t.step_func_done((e) => {
+      const expectedKeyValue = [1];
+      const actualKeyValue = e.target.result.key;
+
+      assert_array_equals(actualKeyValue, expectedKeyValue, "An array keypath should yield an array key");
+    });
+  },
+  `IDBIndex's keyPath array with a single value`);
+
+  indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store', {autoIncrement: true});
+    store.createIndex('index', ['a', 'b']);
+
+    store.add({a: 1, b: 2, c: 3})
+  },
+  (t, db) => {
+    const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
+    const store = tx.objectStore('store');
+    const index = store.index('index');
+    const cursorReq = index.openCursor();
+
+    cursorReq.onsuccess = t.step_func_done((e) => {
+      const expectedKeyValue = [1, 2];
+      const actualKeyValue = e.target.result.key;
+
+      assert_array_equals(actualKeyValue, expectedKeyValue, "An array keypath should yield an array key");
+    });
+  },
+  `IDBIndex's keyPath array with multiple values`);