1 files changed, 65 insertions, 0 deletions
diff --git a/js/src/tests/non262/async-functions/cover-init-name-syntax.js b/js/src/tests/non262/async-functions/cover-init-name-syntax.js
new file mode 100644
index 0000000000..cb7858a67a
--- /dev/null
+++ b/js/src/tests/non262/async-functions/cover-init-name-syntax.js
@@ -0,0 +1,65 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// CoverInitName in async arrow parameters.
+async ({a = 1}) => {};
+async ({a = 1}, {b = 2}) => {};
+async ({a = 1}, {b = 2}, {c = 3}) => {};
+async ({a = 1} = {}, {b = 2}, {c = 3}) => {};
+async ({a = 1} = {}, {b = 2} = {}, {c = 3}) => {};
+async ({a = 1} = {}, {b = 2} = {}, {c = 3} = {}) => {};
+
+// CoverInitName nested in array destructuring.
+async ([{a = 0}]) => {};
+
+// CoverInitName nested in rest pattern.
+async ([...[{a = 0}]]) => {};
+
+// CoverInitName nested in object destructuring.
+async ({p: {a = 0}}) => {};
+
+// CoverInitName in CoverCallExpressionAndAsyncArrowHead, but not AsyncArrowHead.
+assertThrowsInstanceOf(() => eval(`
+    NotAsync({a = 1});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    NotAsync({a = 1}, {b = 2}, {c = 3});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    NotAsync({a = 1}, {b = 2}, {c = 3} = {});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    NotAsync({a = 1}, {b = 2} = {}, {c = 3} = {});
+`), SyntaxError);
+
+// Starts with "async", but not called from AssignmentExpression.
+assertThrowsInstanceOf(() => eval(`
+    typeof async({a = 1});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    typeof async({a = 1}, {b = 2}, {c = 3});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    typeof async({a = 1}, {b = 2}, {c = 3} = {});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    typeof async({a = 1}, {b = 2} = {}, {c = 3} = {});
+`), SyntaxError);
+
+// CoverInitName in CoverCallExpressionAndAsyncArrowHead, but not AsyncArrowHead.
+assertThrowsInstanceOf(() => eval(`
+    obj.async({a = 1});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    obj.async({a = 1}, {b = 2}, {c = 3});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    obj.async({a = 1}, {b = 2}, {c = 3} = {});
+`), SyntaxError);
+assertThrowsInstanceOf(() => eval(`
+    obj.async({a = 1}, {b = 2} = {}, {c = 3} = {});
+`), SyntaxError);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);