Add TestCase for EuropeanCentralBankExchange

tests/Library/Economy/Currency/EuropeanCentralBankExchangeTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Tests\Library\Economy\Currency;
+
+use App\Library\Economy\Currency\EuropeanCentralBankExchange;
+use PHPUnit\Framework\TestCase;
+
+class EuropeanCentralBankExchangeTest extends TestCase
+{
+    public function testGetsData()
+    {
+        $exchange = new EuropeanCentralBankExchange;
+        $exchangeData = $exchange->getData();
+
+        $this->assertIsArray($exchangeData);
+        $this->assertArrayHasKey('Cube', $exchangeData);
+        $this->assertArrayHasKey('@attributes', $exchangeData);
+    }
+
+    public function testStoresDataInApcuCache()
+    {
+        $exchange = new EuropeanCentralBankExchange;
+        // Data should be available on instantiation
+
+        $data = \apcu_fetch($exchange::ECB_DATA);
+
+        $this->assertNotFalse($data);
+
+        $exchangeData = \json_decode($data, true);
+        
+        $this->assertIsArray($exchangeData);
+        $this->assertArrayHasKey('Cube', $exchangeData);
+        $this->assertArrayHasKey('@attributes', $exchangeData);
+    }
+}