1 files changed, 104 insertions, 0 deletions
diff --git a/js/src/tests/non262/async-functions/syntax-arrow.js b/js/src/tests/non262/async-functions/syntax-arrow.js
new file mode 100644
index 0000000000..a2c96e7dd9
--- /dev/null
+++ b/js/src/tests/non262/async-functions/syntax-arrow.js
@@ -0,0 +1,104 @@
+var BUGNUMBER = 1185106;
+var summary = "async arrow function syntax";
+
+print(BUGNUMBER + ": " + summary);
+
+if (typeof Reflect !== "undefined" && Reflect.parse) {
+    // Parameters.
+    Reflect.parse("async () => 1");
+    Reflect.parse("async a => 1");
+    Reflect.parse("async (a) => 1");
+    Reflect.parse("async async => 1");
+    Reflect.parse("async (async) => 1");
+    Reflect.parse("async ([a]) => 1");
+    Reflect.parse("async ([a, b]) => 1");
+    Reflect.parse("async ({a}) => 1");
+    Reflect.parse("async ({a, b}) => 1");
+
+    assertThrowsInstanceOf(() => Reflect.parse("async await => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async (await) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ([await]) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ({await}) => 1"), SyntaxError);
+
+    assertThrowsInstanceOf(() => Reflect.parse("async (a=await) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ([a=await]) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ({a=await}) => 1"), SyntaxError);
+
+    assertThrowsInstanceOf(() => Reflect.parse("async (a=await 1) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ([a=await 1]) => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async ({a=await 1}) => 1"), SyntaxError);
+
+    assertThrowsInstanceOf(() => Reflect.parse("async [a] => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async [a, b] => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async {a} => 1"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async {a: b} => 1"), SyntaxError);
+
+    // Expression body.
+    Reflect.parse("async a => a == b");
+
+    // Expression body with nested async function.
+    Reflect.parse("async a => async");
+    Reflect.parse("async a => async b => c");
+    Reflect.parse("async a => async function() {}");
+    Reflect.parse("async a => async function b() {}");
+
+    assertThrowsInstanceOf(() => Reflect.parse("async a => async b"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async a => async function"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async a => async function()"), SyntaxError);
+
+    // Expression body with `await`.
+    Reflect.parse("async a => await 1");
+    Reflect.parse("async a => await await 1");
+    Reflect.parse("async a => await await await 1");
+
+    assertThrowsInstanceOf(() => Reflect.parse("async a => await"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("async a => await await"), SyntaxError);
+
+    // `await` is Unary Expression and it cannot have `async` function as an
+    // operand.
+    assertThrowsInstanceOf(() => Reflect.parse("async a => await async X => Y"), SyntaxError);
+    Reflect.parse("async a => await (async X => Y)");
+    // But it can have `async` identifier as an operand.
+    Reflect.parse("async async => await async");
+
+    // Block body.
+    Reflect.parse("async X => {yield}");
+
+    // `yield` handling.
+    Reflect.parse("async X => yield");
+    Reflect.parse("async yield => X");
+    Reflect.parse("async yield => yield");
+    Reflect.parse("async X => {yield}");
+
+    Reflect.parse("async X => {yield}");
+    Reflect.parse("async yield => {X}");
+    Reflect.parse("async yield => {yield}");
+    Reflect.parse("function* g() { async X => yield }");
+
+    assertThrowsInstanceOf(() => Reflect.parse("'use strict'; async yield => X"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("'use strict'; async (yield) => X"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("'use strict'; async X => yield"), SyntaxError);
+    assertThrowsInstanceOf(() => Reflect.parse("'use strict'; async X => {yield}"), SyntaxError);
+
+    assertThrows(() => Reflect.parse("function* g() { async yield => X }"));
+    assertThrows(() => Reflect.parse("function* g() { async (yield) => X }"));
+    assertThrows(() => Reflect.parse("function* g() { async ([yield]) => X }"));
+    assertThrows(() => Reflect.parse("function* g() { async ({yield}) => X }"));
+
+    // Not async functions.
+    Reflect.parse("async ()");
+    Reflect.parse("async (a)");
+    Reflect.parse("async (async)");
+    Reflect.parse("async ([a])");
+    Reflect.parse("async ([a, b])");
+    Reflect.parse("async ({a})");
+    Reflect.parse("async ({a, b})");
+
+    // Async arrow function is assignment expression.
+    Reflect.parse("a ? async () => {1} : b");
+    Reflect.parse("a ? b : async () => {1}");
+    assertThrowsInstanceOf(() => Reflect.parse("async () => {1} ? a : b"), SyntaxError);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);