1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/import/import-attributes/json-idempotency.js b/js/src/tests/test262/language/import/import-attributes/json-idempotency.js
new file mode 100644
index 0000000000..1cadd19aae
--- /dev/null
+++ b/js/src/tests/test262/language/import/import-attributes/json-idempotency.js
@@ -0,0 +1,22 @@
+// |reftest| skip module async -- json-modules is not supported
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-parse-json-module
+description: The same object representation is returned to all import sites
+flags: [module, async]
+features: [import-attributes, json-modules, globalThis, dynamic-import]
+---*/
+
+import viaStaticImport1 from './json-idempotency_FIXTURE.json' with { type: 'json' };
+import {default as viaStaticImport2} from './json-idempotency_FIXTURE.json' with { type: 'json' };
+import './json-idempotency-indirect_FIXTURE.js';
+
+assert.sameValue(viaStaticImport1, viaStaticImport2);
+assert.sameValue(globalThis.viaSecondModule, viaStaticImport1);
+
+import('./json-idempotency_FIXTURE.json', { with: { type: 'json' } })
+  .then(function(viaDynamicImport) {
+    assert.sameValue(viaDynamicImport.default, viaStaticImport1);
+  })
+  .then($DONE, $DONE);