Add m-esr52 at 52.6.0

1 files changed, 38 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Class/derivedConstructorArrowEvalEscapeUninitialized.js b/js/src/tests/ecma_6/Class/derivedConstructorArrowEvalEscapeUninitialized.js
new file mode 100644
index 000000000..970beb043
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/derivedConstructorArrowEvalEscapeUninitialized.js
@@ -0,0 +1,38 @@
+let superArrow;
+let thisArrow;
+
+let thisStash;
+
+class base {
+    constructor() {
+        // We run this constructor twice as part of the double init check
+        if (!thisStash)
+            thisStash = {prop:45};
+        return thisStash;
+    }
+}
+
+class foo extends base {
+    constructor() {
+        superArrow = (()=>super());
+        thisArrow = ()=>this;
+    }
+}
+
+// Populate the arrow function saves. Since we never invoke super(), we throw
+assertThrowsInstanceOf(()=>new foo(), ReferenceError);
+
+// No |this| binding in the closure, yet
+assertThrowsInstanceOf(thisArrow, ReferenceError);
+
+// call super()
+superArrow();
+
+// Can't call it twice
+assertThrowsInstanceOf(superArrow, ReferenceError);
+
+// Oh look, |this| is populated, now.
+assertEq(thisArrow(), thisStash);
+
+if (typeof reportCompare === 'function')
+    reportCompare(0,0,"OK");