diff --git a/tests/anchor.test.php b/tests/anchor.test.php
index 61cd84c..236ef60 100644
--- a/tests/anchor.test.php
+++ b/tests/anchor.test.php
@@ -1,5 +1,46 @@
 <?php
 
-test('example', function () {
-    expect(true)->toBeTrue();
+use Leaf\Anchor;
+
+test('set config', function () {
+    Anchor::config(['SECRET' => 'item']);
+    $config = Anchor::config();
+
+    expect($config['SECRET'])->toBe('item');
+});
+
+test('sanitize', function () {
+    $html = '<b>Hello World</b>';
+
+    expect(Anchor::sanitize($html))->toBe(htmlspecialchars($html));
+});
+
+test('sanitize array', function () {
+    $html = ['<b>Hello World</b>', '<b>Hello World</b>'];
+
+    expect(Anchor::sanitize($html))->toBe([
+        htmlspecialchars('<b>Hello World</b>'),
+        htmlspecialchars('<b>Hello World</b>'),
+    ]);
+});
+
+test('sanitize assoc array', function () {
+    $html = ['key' => '<b>Hello World</b>'];
+
+    expect(Anchor::sanitize($html))->toBe(['key' => htmlspecialchars('<b>Hello World</b>')]);
+});
+
+test('generate token', function () {
+    expect(Anchor::generateToken())->toBeString();
+});
+
+test('secret in token', function () {
+    $anchorSecret = 'SOMETHING';
+    Anchor::config(['SECRET' => $anchorSecret]);
+
+    expect(strpos(hex2bin(Anchor::generateToken()), $anchorSecret))->toBe(0);
+});
+
+test('errors', function () {
+    expect(Anchor::errors())->toBeArray();
 });