1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/try/optional-catch-binding-lexical.js b/js/src/tests/test262/language/statements/try/optional-catch-binding-lexical.js
new file mode 100644
index 0000000000..a9d9f55ae5
--- /dev/null
+++ b/js/src/tests/test262/language/statements/try/optional-catch-binding-lexical.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2017 Lucas Azzola. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Lucas Azzola
+esid: pending
+description: lexical environment runtime semantics for optional catch binding
+features: [optional-catch-binding]
+info: |
+  Runtime Semantics: CatchClauseEvaluation
+
+  Catch : catch Block
+    Let oldEnv be the running execution context's LexicalEnvironment.
+    Let catchEnv be NewDeclarativeEnvironment(oldEnv).
+    Set the running execution context's LexicalEnvironment to catchEnv.
+    (...)
+    Set the running execution context's LexicalEnvironment to oldEnv.
+    Return Completion(B).
+---*/
+
+let x = 1;
+let ranCatch = false;
+
+try {
+    x = 2;
+    throw new Error();
+} catch {
+    let x = 3;
+    let y = true;
+    ranCatch = true;
+}
+
+assert(ranCatch, 'executed `catch` block');
+assert.sameValue(x, 2);
+
+assert.throws(ReferenceError, function() {
+    y;
+});
+
+reportCompare(0, 0);