1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testArrayBufferWithUserOwnedContents.cpp b/js/src/jsapi-tests/testArrayBufferWithUserOwnedContents.cpp
new file mode 100644
index 0000000000..9a360e38be
--- /dev/null
+++ b/js/src/jsapi-tests/testArrayBufferWithUserOwnedContents.cpp
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+
+#include <stdint.h>  // uint32_t
+
+#include "js/ArrayBuffer.h"  // JS::{DetachArrayBuffer,GetArrayBuffer{ByteLength,Data},IsArrayBufferObject,NewArrayBufferWithUserOwnedContents}
+#include "js/GCAPI.h"        // JS::AutoCheckCannotGC, JS_GC
+#include "js/RootingAPI.h"   // JS::Rooted
+#include "jsapi-tests/tests.h"
+#include "vm/ArrayBufferObject.h"
+
+char testData[] =
+    "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+constexpr size_t testDataLength = sizeof(testData);
+
+static void GC(JSContext* cx) {
+  JS_GC(cx);
+  // Trigger another to wait for background finalization to end.
+  JS_GC(cx);
+}
+
+BEGIN_TEST(testArrayBufferWithUserOwnedContents) {
+  JS::Rooted<JSObject*> obj(cx, JS::NewArrayBufferWithUserOwnedContents(
+                                    cx, testDataLength, testData));
+  GC(cx);
+  CHECK(VerifyObject(obj, testDataLength));
+  GC(cx);
+  JS::DetachArrayBuffer(cx, obj);
+  GC(cx);
+  CHECK(VerifyObject(obj, 0));
+
+  return true;
+}
+
+bool VerifyObject(JS::HandleObject obj, uint32_t length) {
+  JS::AutoCheckCannotGC nogc;
+
+  CHECK(obj);
+  CHECK(JS::IsArrayBufferObject(obj));
+  CHECK_EQUAL(JS::GetArrayBufferByteLength(obj), length);
+  bool sharedDummy;
+  const char* data = reinterpret_cast<const char*>(
+      JS::GetArrayBufferData(obj, &sharedDummy, nogc));
+  if (length == testDataLength) {
+    CHECK(data);
+    CHECK(testData == data);
+  }
+
+  return true;
+}
+
+END_TEST(testArrayBufferWithUserOwnedContents)