test: add write tests

Author: mychidarko

tests/write.test.php

@@ -0,0 +1,36 @@
+<?php
+
+test('values can be added to session', function () {
+    $name = 'John Doe';
+
+    $session = new \Leaf\Http\Session();
+    $session->set('name', $name);
+
+    expect($_SESSION['name'] ?? null)->toBe($name);
+});
+
+test('multiple values can be set at once', function () {
+    $name = 'John Doe 2';
+    $age = 20;
+
+    $session = new \Leaf\Http\Session();
+    $session->set([
+        'name' => $name,
+        'age' => $age
+    ]);
+
+    expect($_SESSION['name'] ?? null)->toBe($name);
+    expect($_SESSION['age'] ?? null)->toBe($age);
+});
+
+test('values can be set using dot notation', function () {
+    $name = 'John Doe 3';
+    $age = 30;
+
+    $session = new \Leaf\Http\Session();
+    $session->set('user.name', $name);
+    $session->set('user.age', $age);
+
+    expect($_SESSION['user']['name'] ?? null)->toBe($name);
+    expect($_SESSION['user']['age'] ?? null)->toBe($age);
+});