Added first test

.travis.yml

@@ -21,6 +21,7 @@ matrix:
 before_install:
   - if [[ $EXECUTE_COVERAGE != 'true' ]]; then phpenv config-rm xdebug.ini || return 0 ; fi
   - composer self-update
+  - if [[ $EXECUTE_COVERAGE == 'true' ]]; then composer require --no-update satooshi/php-coveralls:dev-master ; fi
 
 install:
   - travis_retry composer install --no-interaction --ignore-platform-reqs

phpunit.xml.dist

@@ -5,7 +5,7 @@
         </testsuite>
     </testsuites>
     <filter>
-        <whitelist>
+        <whitelist processUncoveredFilesFromWhitelist="true">
             <directory suffix=".php">src</directory>
         </whitelist>
     </filter>

tests/JsonApi/Schema/LinkTest.php

@@ -0,0 +1,31 @@
+<?php
+namespace WoohooLabsTest\Yin\JsonApi\Schema;
+
+use PHPUnit_Framework_TestCase;
+use WoohooLabs\Yin\JsonApi\Schema\Link;
+
+class LinkTest extends PHPUnit_Framework_TestCase
+{
+    public function testGetHref()
+    {
+        $link = $this->createLink("http://example.com");
+        $this->assertEquals("http://example.com", $link->getHref());
+    }
+
+    public function testAbsoluteLinkTransform()
+    {
+        $link = $this->createLink("http://example.com");
+        $this->assertEquals("http://example.com", $link->transform(""));
+    }
+
+    public function testRelativeLinkTransform()
+    {
+        $link = $this->createLink("/api/users");
+        $this->assertEquals("http://example.com/api/users", $link->transform("http://example.com"));
+    }
+
+    private function createLink($href)
+    {
+        return new Link($href);
+    }
+}