Support custom inspection of objects (#2791)

1 files changed, 19 insertions, 2 deletions

diff --git a/js/console_test.ts b/js/console_test.ts
index 8070ee0f0..a2f9280a1 100644
--- a/js/console_test.ts
+++ b/js/console_test.ts
@@ -3,8 +3,15 @@ import { assert, assertEquals, test } from "./test_util.ts";
 
 // Some of these APIs aren't exposed in the types and so we have to cast to any
 // in order to "trick" TypeScript.
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-const { Console, stringifyArgs, inspect, write, stdout } = Deno as any;
+const {
+  Console,
+  customInspect,
+  stringifyArgs,
+  inspect,
+  write,
+  stdout
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+} = Deno as any;
 
 function stringify(...args: unknown[]): string {
   return stringifyArgs(args).replace(/\n$/, "");
@@ -173,6 +180,16 @@ test(function consoleTestStringifyWithDepth(): void {
   );
 });
 
+test(function consoleTestWithCustomInspector(): void {
+  class A {
+    [customInspect](): string {
+      return "b";
+    }
+  }
+
+  assertEquals(stringify(new A()), "b");
+});
+
 test(function consoleTestWithIntegerFormatSpecifier(): void {
   assertEquals(stringify("%i"), "%i");
   assertEquals(stringify("%i", 42.0), "42");