1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Class/outerBinding.js b/js/src/tests/ecma_6/Class/outerBinding.js
new file mode 100644
index 000000000..e0f88a494
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/outerBinding.js
@@ -0,0 +1,45 @@
+// |reftest| skip-if(!xulRuntime.shell)
+//
+// The above skip-if is because global lexicals aren't yet implemented. Remove
+// that and the |evaluate| call below once they are.
+//
+// A class statement creates a mutable lexical outer binding.
+
+class Foo { constructor() { } }
+assertEq(typeof Foo, "function");
+Foo = 5;
+assertEq(Foo, 5);
+
+{
+    class foo { constructor() { } }
+    assertEq(typeof foo, "function");
+    foo = 4;
+    assertEq(foo, 4);
+}
+
+{
+    class PermanentBinding { constructor() { } }
+    delete PermanentBinding;
+    // That...didn't actually work, right?
+    assertEq(typeof PermanentBinding, "function");
+}
+
+evaluate("const globalConstant = 0; var earlyError = true;");
+
+try {
+    evaluate("earlyError = false; class globalConstant { constructor() { } }");
+} catch (e if e instanceof SyntaxError) { }
+assertEq(earlyError, true);
+
+function strictEvalShadows() {
+    "use strict";
+    let x = 4;
+    eval(`class x { constructor() { } }
+           assertEq(typeof x, "function");
+         `);
+    assertEq(x, 4);
+}
+strictEvalShadows()
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "OK");