assert: inspect getters

While asserting two objects the descriptor is not taken into account.
Therefore getters will be triggered as such. This makes sure they
are also highlighted in the error message instead of potentially
looking identical while the return value of the getter is actually
different.

PR-URL: #25004
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

lib/internal/assert.js

@@ -56,7 +56,9 @@ function inspectValue(val) {
       breakLength: Infinity,
       // Assert does not detect proxies currently.
       showProxy: false,
-      sorted: true
+      sorted: true,
+      // Inspect getters as we also check them when comparing entries.
+      getters: true
     }
   );
 }

test/parallel/test-assert-deep.js

@@ -24,7 +24,8 @@ function re(literals, ...values) {
       customInspect: false,
       maxArrayLength: Infinity,
       breakLength: Infinity,
-      sorted: true
+      sorted: true,
+      getters: true
     });
     // Need to escape special characters.
     result += str;
@@ -1049,3 +1050,24 @@ assert.throws(
   });
   assertDeepAndStrictEqual(a, b);
 }
+
+// Check getters.
+{
+  const a = {
+    get a() { return 5; }
+  };
+  const b = {
+    get a() { return 6; }
+  };
+  assert.throws(
+    () => assert.deepStrictEqual(a, b),
+    {
+      code: 'ERR_ASSERTION',
+      name: 'AssertionError [ERR_ASSERTION]',
+      message: /a: \[Getter: 5]\n-   a: \[Getter: 6]\n  /
+    }
+  );
+
+  // The descriptor is not compared.
+  assertDeepAndStrictEqual(a, { a: 5 });
+}