Implement Identifiable Interface [#26]

Closes #26

phpunit.xml

@@ -69,6 +69,9 @@
         <testsuite name="FileCreation">
             <file>tests/FileCreationTest.php</file>
         </testsuite>
+        <testsuite name="General">
+            <file>tests/GeneralTest.php</file>
+        </testsuite>
     </testsuites>
     <filter>
         <whitelist>

src/Contracts/ResourceInterface.php

@@ -2,7 +2,8 @@
 
 namespace Bulldog\Strype\Contracts;
 
-interface ResourceInterface
+use Bulldog\Strype\Contracts\Support\Identifiable;
+
+interface ResourceInterface extends Identifiable
 {
-    public function getId(): string;
 }

src/Contracts/Support/Identifiable.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Bulldog\Strype\Contracts\Support;
+
+interface Identifiable
+{
+    public function getId(): string;
+}

tests/GeneralTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Strype;
+
+class GeneralTest extends TestCase
+{
+    public function testCustomerImplementsInterfaces()
+    {
+        $customer = $this->strype->customer()->create('levi@example.com', 'tok_mastercard');
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\Support\Identifiable);
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\ResourceInterface);
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\Traits\DeleteInterface);
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\Traits\UpdateInterface);
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\Traits\ListAllInterface);
+        $this->assertTrue($customer instanceof \Bulldog\Strype\Contracts\Traits\RetrieveInterface);
+    }
+}