1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/tests/non262/async-functions/await-in-parameters-of-async-func.js b/js/src/tests/non262/async-functions/await-in-parameters-of-async-func.js
new file mode 100644
index 0000000000..ef4b84d99b
--- /dev/null
+++ b/js/src/tests/non262/async-functions/await-in-parameters-of-async-func.js
@@ -0,0 +1,67 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor: 
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 1478910;
+var summary = 'JSMSG_AWAIT_IN_PARAMETER error for incomplete await expr in async function/generator parameter';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus(summary);
+
+  let testAwaitInDefaultExprOfAsyncFunc = (code) => {
+  	assertThrowsInstanceOf(() => eval(code), SyntaxError, "await expression can't be used in parameter");
+  };
+
+  let testNoException = (code) => {
+  	assertEq(completesNormally(code), true);
+  };
+
+  // https://www.ecma-international.org/ecma-262/9.0/
+
+  // Async Generator Function Definitions : AsyncGeneratorDeclaration & AsyncGeneratorExpression
+  // async function* f() {}
+  // f = async function*() {}
+  testAwaitInDefaultExprOfAsyncFunc("async function* f(a = await) {}");
+  testAwaitInDefaultExprOfAsyncFunc("let f = async function*(a = await) {}");
+
+  testAwaitInDefaultExprOfAsyncFunc("function f(a = async function*(a = await) {}) {}");
+  testAwaitInDefaultExprOfAsyncFunc("function f() { a = async function*(a = await) {}; }");
+
+  testAwaitInDefaultExprOfAsyncFunc("async function* f() { a = async function*(a = await) {}; }");
+  testNoException("async function* f() { let a = function(a = await) {}; }");
+
+  testNoException("async function* f(a = async function*() { await 1; }) {}");
+
+  // Async Function Definitions : AsyncFunctionDeclaration & AsyncFunctionExpression
+  // async function f() {}
+  // f = async function() {}
+  testAwaitInDefaultExprOfAsyncFunc("async function f(a = await) {}");
+  testAwaitInDefaultExprOfAsyncFunc("let f = async function(a = await) {}");
+
+  testAwaitInDefaultExprOfAsyncFunc("function f(a = async function(a = await) {}) {}");
+  testAwaitInDefaultExprOfAsyncFunc("function f() { a = async function(a = await) {}; }");
+
+  testAwaitInDefaultExprOfAsyncFunc("async function f() { a = async function(a = await) {}; }");
+  testNoException("async function f() { let a = function(a = await) {}; }");
+
+  testNoException("async function f(a = async function() { await 1; }) {}");
+
+  // Async Arrow Function Definitions : AsyncArrowFunction
+  // async () => {}
+  testAwaitInDefaultExprOfAsyncFunc("async (a = await) => {}");
+
+  testNoException("async (a = async () => { await 1; }) => {}");
+
+  reportCompare(true, true, summary);
+}