1 files changed, 32 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg_parser-spread-expression.js b/devtools/client/debugger/test/mochitest/browser_dbg_parser-spread-expression.js
new file mode 100644
index 000000000..4b7d93d2f
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg_parser-spread-expression.js
@@ -0,0 +1,32 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that spread expressions work both in arrays and function calls.
+ */
+
+"use strict";
+
+function test() {
+  let { Parser, SyntaxTreeVisitor } =
+    Cu.import("resource://devtools/shared/Parser.jsm", {});
+
+  const SCRIPTS = ["[...a]", "foo(...a)"];
+
+  for (let script of SCRIPTS) {
+    info(`Testing spread expression in '${script}'`);
+    let ast = Parser.reflectionAPI.parse(script);
+    let nodes = SyntaxTreeVisitor.filter(ast,
+      e => e.type == "SpreadExpression");
+    ok(nodes && nodes.length === 1, "Found the SpreadExpression node");
+
+    let expr = nodes[0].expression;
+    ok(expr, "The SpreadExpression node has the sub-expression");
+    is(expr.type, "Identifier", "The sub-expression is an Identifier");
+    is(expr.name, "a", "The sub-expression identifier has a correct name");
+  }
+
+  finish();
+}