Add m-esr52 at 52.6.0

1 files changed, 38 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/arrow-functions/syntax-errors.js b/js/src/jit-test/tests/arrow-functions/syntax-errors.js
new file mode 100644
index 000000000..925fd5b89
--- /dev/null
+++ b/js/src/jit-test/tests/arrow-functions/syntax-errors.js
@@ -0,0 +1,38 @@
+// Check that we correctly throw SyntaxErrors for various syntactic near-misses.
+
+load(libdir + "asserts.js");
+
+var mistakes = [
+    "((a)) => expr",
+    "a + b => a",
+    "'' + a => a",
+    "...x",
+    "[x] => x",
+    "([x] => x)",
+    "{p: p} => p",
+    "({p: p} => p)",
+    "{p} => p",
+    "(...x => expr)",
+    "1 || a => a",
+    "'use strict' => {}",
+    "package => {'use strict';}",    // tricky: FutureReservedWord in strict mode code only
+    "'use strict'; arguments => 0",  // names banned in strict mode code
+    "'use strict'; eval => 0",
+    "a => {'use strict'; with (a) return x; }",
+    "a => yield a",
+    "a => { yield a; }",
+    "a => { { let x; yield a; } }",
+    "(a = yield 0) => a",
+    "for (;;) a => { break; };",
+    "for (;;) a => { continue; };",
+    "...rest) =>",
+    "2 + ...rest) =>"
+];
+
+for (var s of mistakes)
+    assertThrowsInstanceOf(function () { Function(s); }, SyntaxError);
+
+// Check that the tricky case is not an error in non-strict-mode code.
+var f = package => 0;
+assertEq(f(1), 0);
+