1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/non262/async-functions/EarlyErrors.js b/js/src/tests/non262/async-functions/EarlyErrors.js
new file mode 100644
index 0000000000..eeac4b2541
--- /dev/null
+++ b/js/src/tests/non262/async-functions/EarlyErrors.js
@@ -0,0 +1,51 @@
+var BUGNUMBER = 1185106;
+var summary = "EarlyErrors for async function";
+
+print(BUGNUMBER + ": " + summary);
+
+function assertThrowsSE(code) {
+  assertThrowsInstanceOf(() => Reflect.parse(code), SyntaxError);
+}
+
+if (typeof Reflect !== "undefined" && Reflect.parse) {
+    // If FormalParameters Contains AwaitExpression is true.
+    assertThrowsSE("async function a(k = await 3) {}");
+    assertThrowsSE("(async function(k = await 3) {})");
+    assertThrowsSE("(async function a(k = await 3) {})");
+
+    // If BindingIdentifier is `eval` or `arguments`.
+    assertThrowsSE("'use strict'; async function eval() {}");
+    assertThrowsSE("'use strict'; (async function eval() {})");
+
+    assertThrowsSE("'use strict'; async function arguments() {}");
+    assertThrowsSE("'use strict'; (async function arguments() {})");
+
+    // If any element of the BoundNames of FormalParameters also occurs in the
+    // LexicallyDeclaredNames of AsyncFunctionBody.
+    assertThrowsSE("async function a(x) { let x; }");
+    assertThrowsSE("(async function(x) { let x; })");
+    assertThrowsSE("(async function a(x) { let x; })");
+
+    // If FormalParameters contains SuperProperty is true.
+    assertThrowsSE("async function a(k = super.prop) { }");
+    assertThrowsSE("(async function(k = super.prop) {})");
+    assertThrowsSE("(async function a(k = super.prop) {})");
+
+    // If AsyncFunctionBody contains SuperProperty is true.
+    assertThrowsSE("async function a() { super.prop(); }");
+    assertThrowsSE("(async function() { super.prop(); })");
+    assertThrowsSE("(async function a() { super.prop(); })");
+
+    // If FormalParameters contains SuperCall is true.
+    assertThrowsSE("async function a(k = super()) {}");
+    assertThrowsSE("(async function(k = super()) {})");
+    assertThrowsSE("(async function a(k = super()) {})");
+
+    // If AsyncFunctionBody contains SuperCall is true.
+    assertThrowsSE("async function a() { super(); }");
+    assertThrowsSE("(async function() { super(); })");
+    assertThrowsSE("(async function a() { super(); })");
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);