1 files changed, 84 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/slice-memcpy.js b/js/src/tests/non262/TypedArray/slice-memcpy.js
new file mode 100644
index 0000000000..a20010ed16
--- /dev/null
+++ b/js/src/tests/non262/TypedArray/slice-memcpy.js
@@ -0,0 +1,84 @@
+const otherGlobal = newGlobal();
+
+// Create with new ArrayBuffer and offset.
+for (var constructor of typedArrayConstructors) {
+    const elementSize = constructor.BYTES_PER_ELEMENT;
+    let ab = new constructor(10).map((v, i) => i).buffer;
+    let ta = new constructor(ab, 2 * elementSize, 6);
+    ta.constructor = {
+        [Symbol.species]: function(len) {
+            return new constructor(new ArrayBuffer((len + 4) * elementSize), 4 * elementSize);
+        }
+    };
+    let tb = ta.slice(0);
+
+    assertEqArray(ta, [2, 3, 4, 5, 6, 7]);
+    assertEqArray(tb, [2, 3, 4, 5, 6, 7]);
+}
+
+// Source and target arrays use the same ArrayBuffer, target range before source range.
+for (var constructor of typedArrayConstructors) {
+    const elementSize = constructor.BYTES_PER_ELEMENT;
+    let ab = new constructor(10).map((v, i) => i).buffer;
+    let ta = new constructor(ab, 2 * elementSize, 6);
+    ta.constructor = {
+        [Symbol.species]: function(len) {
+            return new constructor(ab, 0, len);
+        }
+    };
+    let tb = ta.slice(0);
+
+    assertEqArray(ta, [4, 5, 6, 7, 6, 7]);
+    assertEqArray(tb, [2, 3, 4, 5, 6, 7]);
+    assertEqArray(new constructor(ab), [2, 3, 4, 5, 6, 7, 6, 7, 8, 9]);
+}
+
+// Source and target arrays use the same ArrayBuffer, target range after source range.
+for (var constructor of typedArrayConstructors) {
+    const elementSize = constructor.BYTES_PER_ELEMENT;
+    let ab = new constructor(10).map((v, i) => i + 1).buffer;
+    let ta = new constructor(ab, 0, 6);
+    ta.constructor = {
+        [Symbol.species]: function(len) {
+            return new constructor(ab, 2 * elementSize, len);
+        }
+    };
+    let tb = ta.slice(0);
+
+    assertEqArray(ta, [1, 2, 1, 2, 1, 2]);
+    assertEqArray(tb, [1, 2, 1, 2, 1, 2]);
+    assertEqArray(new constructor(ab), [1, 2, 1, 2, 1, 2, 1, 2, 9, 10]);
+}
+
+// Tricky: Same as above, but with SharedArrayBuffer and different compartments.
+if (this.setSharedObject && this.SharedArrayBuffer) {
+    for (var constructor of typedArrayConstructors) {
+        const elementSize = constructor.BYTES_PER_ELEMENT;
+        let ts = new constructor(new SharedArrayBuffer(10 * elementSize));
+        for (let i = 0; i < ts.length; i++) {
+            ts[i] = i + 1;
+        }
+        let ab = ts.buffer;
+        let ta = new constructor(ab, 0, 6);
+        ta.constructor = {
+            [Symbol.species]: function(len) {
+                setSharedObject(ab);
+                try {
+                    return otherGlobal.eval(`
+                        new ${constructor.name}(getSharedObject(), ${2 * elementSize}, ${len});
+                    `);
+                } finally {
+                    setSharedObject(null);
+                }
+            }
+        };
+        let tb = ta.slice(0);
+
+        assertEqArray(ta, [1, 2, 1, 2, 1, 2]);
+        assertEqArray(tb, [1, 2, 1, 2, 1, 2]);
+        assertEqArray(new constructor(ab), [1, 2, 1, 2, 1, 2, 1, 2, 9, 10]);
+    }
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);