1 files changed, 20 insertions, 0 deletions
diff --git a/tests/specs/run/private_field_presence/private_field_presence.ts b/tests/specs/run/private_field_presence/private_field_presence.ts
new file mode 100644
index 000000000..7ce2840d8
--- /dev/null
+++ b/tests/specs/run/private_field_presence/private_field_presence.ts
@@ -0,0 +1,20 @@
+export class Person {
+  #name: string;
+  constructor(name: string) {
+    this.#name = name;
+  }
+
+  equals(other: unknown) {
+    return other &&
+      typeof other === "object" &&
+      #name in other &&
+      this.#name === other.#name;
+  }
+}
+
+const a = new Person("alice");
+const b = new Person("bob");
+const c = new Person("alice");
+
+console.log(a.equals(b));
+console.log(a.equals(c));