Unit test for appgroup prepaid balance (#451)

Author: divya-intelli

tests/Api/ApigeeX/Controller/AppGroupPrepaidBalanceControllerTest.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Apigee\Edge\Tests\Api\ApigeeX\Controller;
+
+use Apigee\Edge\Api\ApigeeX\Controller\AppGroupPrepaidBalanceController;
+use Apigee\Edge\ClientInterface;
+use Apigee\Edge\Tests\Test\Controller\EntityControllerTester;
+use Apigee\Edge\Tests\Test\Controller\EntityControllerTesterInterface;
+
+/**
+ * Class AppGroupPrepaidBalanceControllerTest.
+ *
+ * @group controller
+ * @group monetization
+ */
+class AppGroupPrepaidBalanceControllerTest extends PrepaidBalanceControllerTestBase
+{
+    protected static $appGroupName = 'phpunit';
+
+    /**
+     * {@inheritdoc}
+     */
+    protected static function entityController(?ClientInterface $client = null): EntityControllerTesterInterface
+    {
+        $client = $client ?? static::defaultAPIClient();
+
+        return new EntityControllerTester(new AppGroupPrepaidBalanceController(self::$appGroupName, static::defaultTestOrganization($client), $client));
+    }
+}

tests/offline-test-data/v1/organizations/phpunit/appgroups/phpunit/balance/GET.json

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+{
+    "wallets": [
+        {
+            "balance": {
+                "currencyCode": "USD",
+                "units": "30",
+                "nanos": 200000000
+            },
+            "lastCreditTime": "1633595340380"
+        }
+    ]
+}

tests/offline-test-data/v1/organizations/phpunit/appgroups/phpunit/balance:credit/GET_expand=true.json

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+{
+    "wallets": [
+        {
+            "balance": {
+                "currencyCode": "AUD",
+                "units": "15",
+                "nanos": 200000000
+            },
+            "lastCreditTime": "1643317863972",
+            "id" : "AUD"
+        },
+        {
+            "balance": {
+                "currencyCode": "USD",
+                "units": "12",
+                "nanos": 345000000
+            },
+            "lastCreditTime": "1643038805286",
+            "id" : "USD"
+        }
+    ]
+}