Add unit tests for AddressBook functionality

tests/Socialbox/AddressBookTest.php

@@ -0,0 +1,39 @@
+<?php
+
+    namespace Socialbox;
+
+    use Helper;
+    use PHPUnit\Framework\TestCase;
+    use Socialbox\Enums\Types\InformationFieldName;
+    use Socialbox\Exceptions\CryptographyException;
+    use Socialbox\Exceptions\DatabaseOperationException;
+    use Socialbox\Exceptions\ResolutionException;
+    use Socialbox\Exceptions\RpcException;
+
+    class AddressBookTest extends TestCase
+    {
+        /**
+         * @throws ResolutionException
+         * @throws RpcException
+         * @throws CryptographyException
+         * @throws DatabaseOperationException
+         */
+        public function testAddressBookAdd(): void
+        {
+            $johnClient = Helper::generateRandomClient(TEAPOT_DOMAIN, prefix: 'johnAddressBookTest');
+            $johnClient->settingsAddInformationField(InformationFieldName::DISPLAY_NAME, 'John Doe');
+            $johnClient->settingsSetPassword('SecretTestingPassword123');
+            $this->assertTrue($johnClient->getSessionState()->isAuthenticated());
+
+            $aliceClient = Helper::generateRandomClient(COFFEE_DOMAIN, prefix: 'aliceAddressBookTest');
+            $aliceClient->settingsAddInformationField(InformationFieldName::DISPLAY_NAME, 'Alice Smith');
+            $aliceClient->settingsSetPassword('SecretTestingPassword123');
+            $this->assertTrue($aliceClient->getSessionState()->isAuthenticated());
+
+            $johnClient->addressBookAddContact($aliceClient->getIdentifiedAs());
+            $this->assertTrue($johnClient->addressBookContactExists($aliceClient->getIdentifiedAs()));
+
+            $aliceClient->addressBookAddContact($johnClient->getIdentifiedAs());
+            $this->assertTrue($aliceClient->addressBookContactExists($johnClient->getIdentifiedAs()));
+        }
+    }