Add m-esr52 at 52.6.0

1 files changed, 48 insertions, 0 deletions

diff --git a/js/src/jsapi-tests/testExternalArrayBuffer.cpp b/js/src/jsapi-tests/testExternalArrayBuffer.cpp
new file mode 100644
index 000000000..cb864d37c
--- /dev/null
+++ b/js/src/jsapi-tests/testExternalArrayBuffer.cpp
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ */
+
+#include "jsfriendapi.h"
+#include "jsapi-tests/tests.h"
+#include "vm/ArrayBufferObject.h"
+
+char test_data[] = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+static void GC(JSContext* cx)
+{
+    JS_GC(cx);
+    // Trigger another to wait for background finalization to end.
+    JS_GC(cx);
+}
+
+BEGIN_TEST(testExternalArrayBuffer)
+{
+    size_t length = sizeof(test_data);
+    JS::RootedObject obj(cx, JS_NewArrayBufferWithExternalContents(cx, length, test_data));
+    GC(cx);
+    CHECK(VerifyObject(obj, length));
+    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));
+    CHECK(data);
+    CHECK(test_data == data);
+
+    return true;
+}
+
+END_TEST(testExternalArrayBuffer)