Add m-esr52 at 52.6.0

1 files changed, 24 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Class/newTargetArrow.js b/js/src/tests/ecma_6/Class/newTargetArrow.js
new file mode 100644
index 000000000..548f75047
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/newTargetArrow.js
@@ -0,0 +1,24 @@
+// new.target is valid in any arrow function not in a global context.
+new Function('(() => new.target)()');
+
+// It's also good inside eval, but not global eval
+assertThrowsInstanceOf(() => eval('() => new.target'), SyntaxError);
+
+function assertNewTarget(expected) {
+    assertEq((()=>new.target)(), expected);
+    assertEq(eval('()=>new.target')(), expected);
+
+    // Make sure that arrow functions can escape their original context and
+    // still get the right answer.
+    return (() => new.target);
+}
+
+const ITERATIONS = 550;
+for (let i = 0; i < ITERATIONS; i++)
+    assertEq(assertNewTarget(undefined)(), undefined);
+
+for (let i = 0; i < ITERATIONS; i++)
+    assertEq(new assertNewTarget(assertNewTarget)(), assertNewTarget);
+
+if (typeof reportCompare === 'function')
+    reportCompare(0,0,"OK");