feat(perfectprivacy): port forwarding support (#2378)

internal/provider/perfectprivacy/portforward_test.go

@@ -0,0 +1,33 @@
+package perfectprivacy
+
+import (
+	"net/netip"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_internalIPToPorts(t *testing.T) {
+	t.Parallel()
+
+	testCases := map[string]struct {
+		internalIP netip.Addr
+		ports      []uint16
+	}{
+		"example_case": {
+			internalIP: netip.AddrFrom4([4]byte{10, 0, 203, 88}),
+			ports:      []uint16{12904, 22904, 32904},
+		},
+	}
+
+	for name, testCase := range testCases {
+		testCase := testCase
+		t.Run(name, func(t *testing.T) {
+			t.Parallel()
+
+			ports := internalIPToPorts(testCase.internalIP)
+
+			assert.Equal(t, testCase.ports, ports)
+		})
+	}
+}