1 files changed, 30 insertions, 0 deletions
diff --git a/tests/unit/network_interfaces_test.ts b/tests/unit/network_interfaces_test.ts
new file mode 100644
index 000000000..160efbfe6
--- /dev/null
+++ b/tests/unit/network_interfaces_test.ts
@@ -0,0 +1,30 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import { assert } from "./test_util.ts";
+
+Deno.test(
+  {
+    name: "Deno.networkInterfaces",
+    permissions: { sys: ["networkInterfaces"] },
+  },
+  () => {
+    const networkInterfaces = Deno.networkInterfaces();
+    assert(Array.isArray(networkInterfaces));
+    assert(networkInterfaces.length > 0);
+    for (
+      const { name, family, address, netmask, scopeid, cidr, mac }
+        of networkInterfaces
+    ) {
+      assert(typeof name === "string");
+      assert(family === "IPv4" || family === "IPv6");
+      assert(typeof address === "string");
+      assert(typeof netmask === "string");
+      assert(
+        (family === "IPv6" && typeof scopeid === "number") ||
+          (family === "IPv4" && scopeid === null),
+      );
+      assert(typeof cidr === "string");
+      assert(typeof mac === "string");
+    }
+  },
+);