Improve transformers and tests

tests/Unit/Transformers/AvailableBudgetTransformerTest.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * AvailableBudgetTransformerTest.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Transformers;
+
+use FireflyIII\Models\AvailableBudget;
+use FireflyIII\Transformers\AvailableBudgetTransformer;
+use Symfony\Component\HttpFoundation\ParameterBag;
+use Tests\TestCase;
+
+/**
+ * Class AvailableBudgetTransformerTest
+ */
+class AvailableBudgetTransformerTest extends TestCase
+{
+    /**
+     * Test basic transformer
+     *
+     * @covers \FireflyIII\Transformers\AvailableBudgetTransformer
+     */
+    public function testBasic(): void
+    {
+        /** @var AvailableBudget $availableBudget */
+        $availableBudget = AvailableBudget::first();
+        $currency        = $availableBudget->transactionCurrency;
+        // make transformer
+        $transformer = app(AvailableBudgetTransformer::class);
+        $transformer->setParameters(new ParameterBag);
+        $result = $transformer->transform($availableBudget);
+
+        // test results
+        $this->assertEquals($availableBudget->id, $result['id']);
+        $this->assertEquals($currency->id, $result['currency_id']);
+        $this->assertEquals($availableBudget->start_date->format('Y-m-d'), $result['start']);
+        $this->assertEquals(round($availableBudget->amount, 2), $result['amount']);
+
+    }
+
+}