1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/generators/es6-syntax.js b/js/src/jit-test/tests/generators/es6-syntax.js
new file mode 100644
index 0000000000..e805a0b62b
--- /dev/null
+++ b/js/src/jit-test/tests/generators/es6-syntax.js
@@ -0,0 +1,34 @@
+// Test interactions between ES6 generators and not-yet-standard
+// features.
+
+function assertSyntaxError(str) {
+    var msg;
+    var evil = eval;
+    try {
+        // Non-direct eval.
+        evil(str);
+    } catch (exc) {
+        if (exc instanceof SyntaxError)
+            return;
+        msg = "Assertion failed: expected SyntaxError, got " + exc;
+    }
+    if (msg === undefined)
+        msg = "Assertion failed: expected SyntaxError, but no exception thrown";
+    throw new Error(msg + " - " + str);
+}
+
+// Destructuring binding.
+assertSyntaxError("function* f(x = yield) {}");
+assertSyntaxError("function* f(x = yield 17) {}");
+assertSyntaxError("function* f([yield]) {}");
+assertSyntaxError("function* f({ yield }) {}");
+assertSyntaxError("function* f(...yield) {}");
+
+// For each.
+assertSyntaxError("for yield");
+assertSyntaxError("for yield (;;) {}");
+assertSyntaxError("for yield (x of y) {}");
+assertSyntaxError("for yield (var i in o) {}");
+
+// Expression bodies.
+assertSyntaxError("function* f() yield 7");