1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/elements/class-field-is-observable-by-proxy.js b/js/src/tests/test262/language/statements/class/elements/class-field-is-observable-by-proxy.js
new file mode 100644
index 0000000000..9585324332
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/elements/class-field-is-observable-by-proxy.js
@@ -0,0 +1,48 @@
+// Copyright (C) 2019 Caio Lima. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Public class fields initialization calls [[DefineOwnProperty]]
+esid: sec-define-field
+info: |
+  DefineField(receiver, fieldRecord)
+    ...
+    8. If fieldName is a Private Name,
+      a. Perform ? PrivateFieldAdd(fieldName, receiver, initValue).
+    9. Else,
+      a. Assert: IsPropertyKey(fieldName) is true.
+      b. Perform ? CreateDataPropertyOrThrow(receiver, fieldName, initValue).
+    10. Return.
+includes: [compareArray.js]
+features: [class, class-fields-public, Proxy]
+---*/
+
+let arr = [];
+let expectedTarget = null;
+function ProxyBase() {
+  expectedTarget = this;
+  return new Proxy(this, {
+    defineProperty: function (target, key, descriptor) {
+      arr.push(key);
+      arr.push(descriptor.value);
+      arr.push(target);
+      assert.sameValue(descriptor.enumerable, true);
+      assert.sameValue(descriptor.configurable, true);
+      assert.sameValue(descriptor.writable, true);
+      return Reflect.defineProperty(target, key, descriptor);
+    }
+  });
+}
+
+class Test extends ProxyBase {
+  f = 3;
+  g = "Test262";
+}
+
+let t = new Test();
+assert.sameValue(t.f, 3);
+assert.sameValue(t.g, "Test262");
+
+assert.compareArray(arr, ["f", 3, expectedTarget, "g", "Test262", expectedTarget]);
+
+reportCompare(0, 0);