1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testArrayBufferSlice.js b/js/src/jit-test/tests/basic/testArrayBufferSlice.js
new file mode 100644
index 0000000000..3b1f353def
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testArrayBufferSlice.js
@@ -0,0 +1,57 @@
+function testSlice() {
+    function test(subBuf, starts, size) {
+        var byteLength = size;
+        var subBuffer = eval(subBuf);
+        var subArray = new Int8Array(subBuffer);
+        assertEq(subBuffer.byteLength, byteLength);
+        for (var i = 0; i < size; ++i)
+            assertEq(starts + i, subArray[i]);
+    }
+
+    var buffer = new ArrayBuffer(32);
+    var array = new Int8Array(buffer);
+    for (var i = 0; i < 32; ++i)
+        array[i] = i;
+
+    test("buffer.slice(0)", 0, 32);
+    test("buffer.slice(16)", 16, 16);
+    test("buffer.slice(24)", 24, 8);
+    test("buffer.slice(32)", 32, 0);
+    test("buffer.slice(40)", 32, 0);
+    test("buffer.slice(80)", 32, 0);
+
+    test("buffer.slice(-8)", 24, 8);
+    test("buffer.slice(-16)", 16, 16);
+    test("buffer.slice(-24)", 8, 24);
+    test("buffer.slice(-32)", 0, 32);
+    test("buffer.slice(-40)", 0, 32);
+    test("buffer.slice(-80)", 0, 32);
+
+    test("buffer.slice(0, 32)", 0, 32);
+    test("buffer.slice(0, 16)", 0, 16);
+    test("buffer.slice(8, 24)", 8, 16);
+    test("buffer.slice(16, 32)", 16, 16);
+    test("buffer.slice(24, 16)", 24, 0);
+
+    test("buffer.slice(16, -8)", 16, 8);
+    test("buffer.slice(-20, 30)", 12, 18);
+
+    test("buffer.slice(-8, -20)", 24, 0);
+    test("buffer.slice(-20, -8)", 12, 12);
+    test("buffer.slice(-40, 16)", 0, 16);
+    test("buffer.slice(-40, 40)", 0, 32);
+
+    gczeal(7, 100000);
+    var nurseryBuf = new ArrayBuffer(32);
+    var arr = new Int8Array(nurseryBuf);
+    arr[0] = 77;
+
+    // tenure nurseryBuf during the slice operation
+    nurseryBuf.slice; // Creates an object
+    schedulegc(1);
+    var newbuf = nurseryBuf.slice(0);
+    var arr2 = new Int8Array(newbuf);
+    assertEq(arr2[0], 77);
+}
+
+testSlice();