feat: add SessionDriver

tests/Unit/Drivers/SessionDriverTest.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+use Wearepixel\Cart\Drivers\SessionDriver;
+use Wearepixel\Cart\Tests\Helpers\SessionMock;
+
+describe('SessionDriver', function () {
+    beforeEach(function () {
+        $this->session = new SessionMock;
+        $this->driver = new SessionDriver($this->session, 'test-session');
+    });
+
+    test('returns its session key', function () {
+        expect($this->driver->getSessionKey())->toBe('test-session');
+    });
+
+    test('returns session as driver name', function () {
+        expect($this->driver->getDriverName())->toBe('session');
+    });
+
+    test('starts with empty items', function () {
+        expect($this->driver->getItems())->toBe([]);
+    });
+
+    test('stores and retrieves items', function () {
+        $items = [['id' => 1, 'name' => 'Widget', 'price' => 10.0]];
+        $this->driver->putItems($items);
+        expect($this->driver->getItems())->toBe($items);
+    });
+
+    test('starts with empty conditions', function () {
+        expect($this->driver->getConditions())->toBe([]);
+    });
+
+    test('stores and retrieves conditions', function () {
+        $conditions = [['name' => 'GST', 'type' => 'tax', 'value' => '10%']];
+        $this->driver->putConditions($conditions);
+        expect($this->driver->getConditions())->toBe($conditions);
+    });
+
+    test('clearItems removes items from session', function () {
+        $this->driver->putItems([['id' => 1]]);
+        $this->driver->putConditions([['name' => 'GST']]);
+        $this->driver->clearItems();
+
+        expect($this->driver->getItems())->toBe([]);
+        expect($this->driver->getConditions())->toBe([['name' => 'GST']]);
+    });
+
+    test('flush removes items and conditions from session', function () {
+        $this->driver->putItems([['id' => 1]]);
+        $this->driver->putConditions([['name' => 'GST']]);
+        $this->driver->flush();
+
+        expect($this->driver->getItems())->toBe([]);
+        expect($this->driver->getConditions())->toBe([]);
+    });
+
+    test('setSessionKey migrates data to new key', function () {
+        $this->driver->putItems([['id' => 1]]);
+        $this->driver->putConditions([['name' => 'GST']]);
+        $this->driver->setSessionKey('new-key');
+
+        expect($this->driver->getSessionKey())->toBe('new-key');
+        expect($this->driver->getItems())->toBe([['id' => 1]]);
+        expect($this->driver->getConditions())->toBe([['name' => 'GST']]);
+    });
+
+    test('getSessionModel returns null', function () {
+        expect($this->driver->getSessionModel())->toBeNull();
+    });
+});