1 files changed, 106 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/exponentiation-unparenthesised-unary.js b/js/src/tests/non262/expressions/exponentiation-unparenthesised-unary.js
new file mode 100644
index 0000000000..a673521264
--- /dev/null
+++ b/js/src/tests/non262/expressions/exponentiation-unparenthesised-unary.js
@@ -0,0 +1,106 @@
+const AsyncFunction = async function(){}.constructor;
+
+function assertNoError(f, msg) {
+  try {
+    f();
+  } catch (e) {
+    assertEq(true, false, `${msg}: ${e}`);
+  }
+}
+
+function assertSyntaxError(code) {
+  assertThrowsInstanceOf(function () { Function(code); }, SyntaxError, "Function:" + code);
+  assertThrowsInstanceOf(function () { AsyncFunction(code); }, SyntaxError, "AsyncFunction:" + code);
+}
+
+function assertNoSyntaxError(code) {
+  assertNoError(function () { Function(code); }, "Function:" + code);
+  assertNoError(function () { AsyncFunction(code); }, "AsyncFunction:" + code);
+}
+
+function assertNoSyntaxErrorAsyncContext(code) {
+  assertNoError(function () { AsyncFunction(code); }, "AsyncFunction:" + code);
+}
+
+const invalidTestCases = [
+  // UnaryExpression : delete UnaryExpression
+  //
+  // Test all possible `delete` expression kinds.
+  "delete a ** 0",
+  "delete a.prop ** 0",
+  "delete a[0] ** 0",
+  "delete a?.prop ** 0",
+  "delete 0 ** 0",
+
+  // UnaryExpression : void UnaryExpression
+  "void a ** 0",
+
+  // UnaryExpression : typeof UnaryExpression
+  //
+  // Test all possible `typeof` expression kinds.
+  "typeof a ** 0",
+  "typeof 0 ** 0",
+
+  // UnaryExpression : + UnaryExpression
+  "+a ** 0",
+
+  // UnaryExpression : - UnaryExpression
+  "-a ** 0",
+
+  // UnaryExpression : ~ UnaryExpression
+  "~a ** 0",
+
+  // UnaryExpression : ! UnaryExpression
+  "!a ** 0",
+
+  // UnaryExpression : AwaitExpression
+  "await a ** 0",
+];
+
+for (let source of invalidTestCases) {
+  assertSyntaxError(source);
+}
+
+const validTestCases = [
+  // UnaryExpression : delete UnaryExpression
+  "(delete a) ** 0",
+  "(delete a.prop) ** 0",
+  "(delete a[0]) ** 0",
+  "(delete a?.prop) ** 0",
+  "(delete 0) ** 0",
+
+  // UnaryExpression : void UnaryExpression
+  "(void a) ** 0",
+
+  // UnaryExpression : typeof UnaryExpression
+  "(typeof a) ** 0",
+  "(typeof 0) ** 0",
+
+  // UnaryExpression : + UnaryExpression
+  "(+a) ** 0",
+
+  // UnaryExpression : - UnaryExpression
+  "(-a) ** 0",
+
+  // UnaryExpression : ~ UnaryExpression
+  "(~a) ** 0",
+
+  // UnaryExpression : ! UnaryExpression
+  "(!a) ** 0",
+];
+
+for (let source of validTestCases) {
+  assertNoSyntaxError(source);
+}
+
+const validTestCasesAsync = [
+  // UnaryExpression : AwaitExpression
+  "(await a) ** 0",
+];
+
+for (let source of validTestCasesAsync) {
+  assertNoSyntaxErrorAsyncContext(source);
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);