From 2200d3538563477af556cef98816525df9edb142 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 18 Jan 2019 09:34:38 -0800
Subject: [PATCH] Add tests

---
 .../restParameters/readonlyRestParameters.ts  | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 tests/cases/conformance/es6/restParameters/readonlyRestParameters.ts

diff --git a/tests/cases/conformance/es6/restParameters/readonlyRestParameters.ts b/tests/cases/conformance/es6/restParameters/readonlyRestParameters.ts
new file mode 100644
index 00000000000..99b939dfd57
--- /dev/null
+++ b/tests/cases/conformance/es6/restParameters/readonlyRestParameters.ts
@@ -0,0 +1,29 @@
+// @strict: true
+// @declaration: true
+
+function f0(a: string, b: string) {
+    f0(a, b);
+    f1(a, b);
+    f2(a, b);
+}
+
+function f1(...args: readonly string[]) {
+    f0(...args);  // Error
+    f1('abc', 'def');
+    f1('abc', ...args);
+    f1(...args);
+}
+
+function f2(...args: readonly [string, string]) {
+    f0(...args);
+    f1('abc', 'def');
+    f1('abc', ...args);
+    f1(...args);
+    f2('abc', 'def');
+    f2('abc', ...args);  // Error
+    f2(...args);
+}
+
+function f4(...args: readonly string[]) {
+    args[0] = 'abc';  // Error
+}