From d4b8e23d94287788513688c93d8e02429e234788 Mon Sep 17 00:00:00 2001
From: James Elliott <james-d-elliott@users.noreply.github.com>
Date: Sat, 19 Aug 2023 12:15:50 +1000
Subject: [PATCH] test: add test case for 750

This adds a test case proving #750
---
 authorize_helper_whitebox_test.go | 66 +++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 authorize_helper_whitebox_test.go

diff --git a/authorize_helper_whitebox_test.go b/authorize_helper_whitebox_test.go
new file mode 100644
index 00000000..de3a37c3
--- /dev/null
+++ b/authorize_helper_whitebox_test.go
@@ -0,0 +1,66 @@
+package fosite
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsLookbackAddress(t *testing.T) {
+	testCases := []struct {
+		name     string
+		have     string
+		expected bool
+	}{
+		{
+			"ShouldReturnTrueIPv4Loopback",
+			"127.0.0.1",
+			true,
+		},
+		{
+			"ShouldReturnTrueIPv4LoopbackWithPort",
+			"127.0.0.1:1230",
+			true,
+		},
+		{
+			"ShouldReturnTrueIPv6Loopback",
+			"[::1]",
+			true,
+		},
+		{
+			"ShouldReturnTrueIPv6LoopbackWithPort",
+			"[::1]:1230",
+			true,
+		}, {
+			"ShouldReturnFalse12700255",
+			"127.0.0.255",
+			false,
+		},
+		{
+			"ShouldReturnTrue12700255WithPort",
+			"127.0.0.255:1230",
+			false,
+		},
+		{
+			"ShouldReturnFalseInvalidFourthOctet",
+			"127.0.0.11230",
+			false,
+		},
+		{
+			"ShouldReturnFalseInvalidIPv4",
+			"127x0x0x11230",
+			false,
+		},
+		{
+			"ShouldReturnFalseInvalidIPv6",
+			"[::1]1230",
+			false,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			assert.Equal(t, tc.expected, isLoopbackAddress(tc.have))
+		})
+	}
+}