Add m-esr52 at 52.6.0

1 files changed, 45 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/LexicalEnvironment/eval-has-lexical-environment.js b/js/src/tests/ecma_6/LexicalEnvironment/eval-has-lexical-environment.js
new file mode 100644
index 000000000..16ffb06d1
--- /dev/null
+++ b/js/src/tests/ecma_6/LexicalEnvironment/eval-has-lexical-environment.js
@@ -0,0 +1,45 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var gTestfile = "eval-has-lexical-environment.js"
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 1193583;
+var summary =
+  "Eval always has a lexical environment";
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+eval(`
+let foo = 42;
+const kay = foo;
+var bar = 84;
+function f() {
+  return foo + kay;
+}
+     `);
+
+(1, eval)(`
+let foo2 = 42;
+const kay2 = foo2;
+`);
+
+// Lexical declarations should not have escaped eval.
+assertEq(typeof foo, "undefined");
+assertEq(typeof kay, "undefined");
+assertEq(typeof foo2, "undefined");
+assertEq(typeof kay2, "undefined");
+
+// Eval'd functions can close over lexical bindings.
+assertEq(f(), 84);
+
+// Var can escape direct eval.
+assertEq(bar, 84);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");