up

internal/fingerprint/fingerprint_test.go

@@ -0,0 +1,19 @@
+package fingerprint
+
+import "testing"
+
+// TestFingerprint_Basic ensures the Fingerprint function executes without error
+// and returns a Result with the default OS placeholder.
+func TestFingerprint_Basic(t *testing.T) {
+	res, err := Fingerprint("127.0.0.1")
+	if err != nil {
+		t.Fatalf("Fingerprint returned error: %v", err)
+	}
+	if res == nil {
+		t.Fatalf("Fingerprint returned nil result")
+	}
+	if res.OS != "Unknown" {
+		t.Fatalf("Expected OS to be 'Unknown', got %s", res.OS)
+	}
+	// The test does not require any open ports; an empty OpenPorts slice is acceptable.
+}