add some new tests & update README for code coverage :)

Author: PapiHack

README.md

@@ -1,6 +1,6 @@
 # PayTech - PHP API Client (installable with Composer)
 
-[![Coverage Status](https://img.shields.io/badge/coverage-100%25-success)](https://coveralls.io/github/PapiHack/paytech-php-client?branch=master)
+[![Coverage Status](https://img.shields.io/badge/coverage-99.25%25-success)](https://coveralls.io/github/PapiHack/paytech-php-client?branch=master)
 ![Issues](https://img.shields.io/github/issues/PapiHack/paytech-php-client)
 ![PR](https://img.shields.io/github/issues-pr/PapiHack/paytech-php-client)
 [![Latest Stable Version](https://poser.pugx.org/papihack/paytech-php-client/v)](//packagist.org/packages/papihack/paytech-php-client)

src/Utils/Check.php

@@ -31,6 +31,6 @@ public static function isCurrencyAllowed($currency)
 
     public static function isEnvAllowed($env) 
     {
-        return array_search(strtoupper($env), self::autorizedEnv);
+        return in_array(strtoupper($env), self::autorizedEnv);
     }
 }

tests/Unit/PayTech/ConfigTest.php

@@ -58,4 +58,14 @@
  it('Should raise an CurrencyException when currency is not allowed', function () {
      $this->expectException(\PayTech\Exceptions\CurrencyException::class);
      Config::setCurrency('dummy currency');
- });
+ });
+
+ it('Should raise an Exception when env is not allowed', function () {
+     $this->expectException(\Exception::class);
+     Config::setEnv('dummyEnv');
+ });
+
+ it('Should set Env when env is allowed', function () {
+    Config::setEnv(\PayTech\Enums\Environment::TEST);
+    $this->assertIsString(Config::getEnv());
+});