From d010c2aeab88ecc300eac377ef653fbf721ab188 Mon Sep 17 00:00:00 2001
From: Blair Zajac <blair@orcaware.com>
Date: Mon, 30 Apr 2018 16:27:34 -0700
Subject: [PATCH] node: add util.isDeepStrictEqual() for v9 and v10. (#25408)

---
 types/node/index.d.ts       | 1 +
 types/node/node-tests.ts    | 3 +++
 types/node/v9/index.d.ts    | 1 +
 types/node/v9/node-tests.ts | 3 +++
 4 files changed, 8 insertions(+)

diff --git a/types/node/index.d.ts b/types/node/index.d.ts
index 8c132f3799..04e074da29 100644
--- a/types/node/index.d.ts
+++ b/types/node/index.d.ts
@@ -6079,6 +6079,7 @@ declare module "util" {
     /** @deprecated since v4.0.0 - use `value === undefined` instead. */
     export function isUndefined(object: any): object is undefined;
     export function deprecate<T extends Function>(fn: T, message: string): T;
+    export function isDeepStrictEqual(val1: any, val2: any): boolean;
 
     export interface CustomPromisify<TCustom extends Function> extends Function {
         __promisify__: TCustom;
diff --git a/types/node/node-tests.ts b/types/node/node-tests.ts
index 7a055c620e..efc00ef201 100644
--- a/types/node/node-tests.ts
+++ b/types/node/node-tests.ts
@@ -851,6 +851,9 @@ namespace util_tests {
         util.deprecate(foo, 'foo() is deprecated, use bar() instead');
         // $ExpectType <T extends Function>(fn: T, message: string) => T
         util.deprecate(util.deprecate, 'deprecate() is deprecated, use bar() instead');
+
+        // util.isDeepStrictEqual
+        util.isDeepStrictEqual({foo: 'bar'}, {foo: 'bar'});
     }
 }
 
diff --git a/types/node/v9/index.d.ts b/types/node/v9/index.d.ts
index 50a17ddb76..d238a3c80b 100644
--- a/types/node/v9/index.d.ts
+++ b/types/node/v9/index.d.ts
@@ -5554,6 +5554,7 @@ declare module "util" {
     export function isSymbol(object: any): object is symbol;
     export function isUndefined(object: any): object is undefined;
     export function deprecate<T extends Function>(fn: T, message: string): T;
+    export function isDeepStrictEqual(val1: any, val2: any): boolean;
 
     export interface CustomPromisify<TCustom extends Function> extends Function {
         __promisify__: TCustom;
diff --git a/types/node/v9/node-tests.ts b/types/node/v9/node-tests.ts
index 7a055c620e..efc00ef201 100644
--- a/types/node/v9/node-tests.ts
+++ b/types/node/v9/node-tests.ts
@@ -851,6 +851,9 @@ namespace util_tests {
         util.deprecate(foo, 'foo() is deprecated, use bar() instead');
         // $ExpectType <T extends Function>(fn: T, message: string) => T
         util.deprecate(util.deprecate, 'deprecate() is deprecated, use bar() instead');
+
+        // util.isDeepStrictEqual
+        util.isDeepStrictEqual({foo: 'bar'}, {foo: 'bar'});
     }
 }