Adding the ability to clean out the compile dir

Author: mtdowling

src/Env.php

@@ -45,4 +45,22 @@ public static function createRuntime()
             default: return new CompilerRuntime($compileDir);
         }
     }
+
+    /**
+     * Delete all previously compiled JMESPath files from the JP_COMPILE_DIR
+     * directory or sys_get_temp_dir().
+     *
+     * @return int Returns the number of deleted files.
+     */
+    public static function cleanCompileDir()
+    {
+        $total = 0;
+        $compileDir = getenv(self::COMPILE_DIR) ?: sys_get_temp_dir();
+        foreach (glob("{$compileDir}/jmespath_*.php") as $file) {
+            $total++;
+            unlink($file);
+        }
+
+        return $total;
+    }
 }

tests/EnvTest.php

@@ -1,18 +1,31 @@
 <?php
 namespace JmesPath\Tests;
 
+use JmesPath\Env;
+use JmesPath\CompilerRuntime;
+
 class EnvTest extends \PHPUnit_Framework_TestCase
 {
     public function testSearchesInput()
     {
         $data = array('foo' => 123);
-        $this->assertEquals(123, \JmesPath\Env::search('foo', $data));
-        $this->assertEquals(123, \JmesPath\Env::search('foo', $data));
+        $this->assertEquals(123, Env::search('foo', $data));
+        $this->assertEquals(123, Env::search('foo', $data));
     }
 
     public function testSearchesWithFunction()
     {
         $data = array('foo' => 123);
         $this->assertEquals(123, \JmesPath\search('foo', $data));
     }
+
+    public function testCleansCompileDir()
+    {
+        $dir = sys_get_temp_dir();
+        $runtime = new CompilerRuntime($dir);
+        $runtime('@', []);
+        $this->assertNotEmpty(glob($dir . '/jmespath_*.php'));
+        $this->assertGreaterThan(0, Env::cleanCompileDir());
+        $this->assertEmpty(glob($dir . '/jmespath_*.php'));
+    }
 }