Add tests for Batch Extension.

Fix bug in Batch Extension.

src/League/Plates/Extension/URI.php

@@ -47,7 +47,7 @@ public function runUri($var1 = null, $var2 = null, $var3 = null, $var4 = null)
             if ($this->parts[$var1] === $var2) {
                 return $var3;
             } else {
-                return $var3;
+                return $var4;
             }
         }
 

tests/League/Plates/Extension/URITest.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace League\Plates\Extension;
+
+class URITest extends \PHPUnit_Framework_TestCase
+{
+    private $extension;
+
+    public function setUp()
+    {
+        $this->extension = new URI('/green/red/blue');
+    }
+
+    public function testCanCreateExtension()
+    {
+        $this->assertInstanceOf('League\Plates\Extension\URI', $this->extension);
+    }
+
+    public function testGetFunctionsReturnsAnArray()
+    {
+        $this->assertInternalType('array', $this->extension->getFunctions());
+    }
+
+    public function testGetFunctionsReturnsAtLeastOneRecord()
+    {
+        $this->assertTrue(count($this->extension->getFunctions()) > 0);
+    }
+
+    public function testGetUrl()
+    {
+        $this->assertTrue($this->extension->runUri() === '/green/red/blue');
+    }
+
+    public function testGetSpecifiedSegment()
+    {
+        $this->assertTrue($this->extension->runUri(1) === 'green');
+        $this->assertTrue($this->extension->runUri(2) === 'red');
+        $this->assertTrue($this->extension->runUri(3) === 'blue');
+    }
+
+    public function testSegmentMatch()
+    {
+        $this->assertTrue($this->extension->runUri(1, 'green'));
+        $this->assertFalse($this->extension->runUri(1, 'red'));
+    }
+
+    public function testSegmentMatchSuccessResponse()
+    {
+        $this->assertTrue($this->extension->runUri(1, 'green', 'success') === 'success');
+    }
+
+    public function testSegmentMatchFailureResponse()
+    {
+        $this->assertTrue($this->extension->runUri(1, 'red', 'success', 'fail') === 'fail');
+    }
+
+    public function testRegexMatch()
+    {
+        $this->assertTrue($this->extension->runUri('/[a-z]+/red/blue'));
+    }
+
+    public function testRegexMatchSuccessResponse()
+    {
+        $this->assertTrue($this->extension->runUri('/[a-z]+/red/blue', 'success') === 'success');
+    }
+
+    public function testRegexMatchFailureResponse()
+    {
+        $this->assertTrue($this->extension->runUri('/[0-9]+/red/blue', 'success', 'fail') === 'fail');
+    }
+}