1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Array/from_realms.js b/js/src/tests/ecma_6/Array/from_realms.js
new file mode 100644
index 000000000..e3a863606
--- /dev/null
+++ b/js/src/tests/ecma_6/Array/from_realms.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+if (typeof newGlobal === 'function') {
+    // G.Array.from, where G is any global, produces an array whose prototype
+    // is G.Array.prototype.
+    var g = newGlobal();
+    var ga = g.Array.from([1, 2, 3]);
+    assertEq(ga instanceof g.Array, true);
+
+    // Even if G.Array is not passed in as the 'this' value to the call.
+    var from = g.Array.from
+    var ga2 = from([1, 2, 3]);
+    assertEq(ga2 instanceof g.Array, true);
+
+    // Array.from can be applied to a constructor from another realm.
+    var p = Array.from.call(g.Array, [1, 2, 3]);
+    assertEq(p instanceof g.Array, true);
+    var q = g.Array.from.call(Array, [3, 4, 5]);
+    assertEq(q instanceof Array, true);
+
+    // The default 'this' value received by a non-strict mapping function is
+    // that function's global, not Array.from's global or the caller's global.
+    var h = newGlobal(), result = undefined;
+    h.mainGlobal = this;
+    h.eval("function f() { mainGlobal.result = this; }");
+    g.Array.from.call(Array, [5, 6, 7], h.f);
+    // (Give each global in the test a name, for better error messages.  But use
+    // globalName, because window.name is complicated.)
+    this.globalName = "main";
+    g.globalName = "g";
+    h.globalName = "h";
+    assertEq(result.globalName, "h");
+}
+
+if (typeof reportCompare === 'function')
+    reportCompare(0, 0);