Add Decoy::hasEl()

Returns a boolean for whether an Element key exists in the elements yaml file(s).  Closes #64

classes/Helpers.php

@@ -210,6 +210,20 @@ public function el($key)
         return app('decoy.elements')->localize($this->locale())->get($key);
     }
 
+    /**
+     * Check if the Element key exists
+     *
+     * @param  string $key
+     * @return boolean
+     */
+    public function hasEl($key)
+    {
+        return app('decoy.elements')
+            ->localize($this->locale())
+            ->hydrate()
+            ->has($key);
+    }
+
     /**
      * Is Decoy handling the request?  Check if the current path is exactly "admin" or if
      * it contains admin/*

phpunit.xml

@@ -10,9 +10,12 @@
          stopOnFailure="false">
 
     <testsuites>
-        <testsuite name="Integrtion Tests">
+        <testsuite name="Integration Tests">
             <directory suffix="Test.php">./tests/Integration</directory>
         </testsuite>
+        <testsuite name="Unit Tests">
+            <directory suffix="Test.php">./tests/Unit</directory>
+        </testsuite>
     </testsuites>
 
     <filter>

tests/Unit/ElementsTest.php

@@ -0,0 +1,21 @@
+<?php
+namespace Tests\Unit;
+
+use Bkwld\Decoy\Helpers;
+use Tests\TestCase;
+
+class ElementsTest extends TestCase
+{
+
+    /**
+     * Test `Decoy::hasEl()`
+     *
+     * @return [type] [description]
+     */
+    public function testHasEl()
+    {
+        $this->assertTrue((new Helpers)->hasEl('homepage.marquee.title'));
+        $this->assertFalse((new Helpers)->hasEl('homepage.fake.title'));
+    }
+
+}