diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..48e0074
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,2 @@
+<phpunit bootstrap="tests/phpunit.php" colors="true">
+</phpunit>
\ No newline at end of file
diff --git a/tests/Base.php b/tests/Base.php
new file mode 100644
index 0000000..e8103da
--- /dev/null
+++ b/tests/Base.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace Tests;
+
+class Base extends \PHPUnit_Framework_TestCase {
+    
+}
\ No newline at end of file
diff --git a/tests/ObfuscateTest.php b/tests/ObfuscateTest.php
new file mode 100644
index 0000000..a960337
--- /dev/null
+++ b/tests/ObfuscateTest.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Tests;
+
+class ObfuscateTest extends Base {
+
+    const AFTER_PATH    = "/after";
+    const BEFORE_PATH   = "/before";
+    const EXPECTED_PATH = "/expected";
+
+    protected function tearDown() {
+        $files = glob(__DIR__ . self::AFTER_PATH . "/*");
+        foreach ($files as $file) {
+            unlink($file);
+        }
+        rmdir(__DIR__ . self::AFTER_PATH);
+    }
+
+    public function testObfuscate() {
+        shell_exec("./bin/obfuscate obfuscate " . __DIR__ . self::BEFORE_PATH . " " . __DIR__ . self::AFTER_PATH . " --config=" . __DIR__ . "/config.yml");
+        $expectedFileNames = scandir(__DIR__ . self::EXPECTED_PATH);
+        foreach ($expectedFileNames as $expectedFileName) {
+            if ($expectedFileName === '.' || $expectedFileName === '..') {
+                continue;
+            }
+            if (!file_exists(__DIR__ . self::AFTER_PATH . "/" . $expectedFileName)) {
+                $this->fail("{$expectedFileName} not found");
+            }
+            $this->assertEquals(file_get_contents(__DIR__ . self::EXPECTED_PATH . "/" . $expectedFileName), file_get_contents(__DIR__ . self::AFTER_PATH . "/" . $expectedFileName));
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/before/Functions.php b/tests/before/Functions.php
new file mode 100644
index 0000000..9d71efe
--- /dev/null
+++ b/tests/before/Functions.php
@@ -0,0 +1,16 @@
+<?php
+
+
+function functionA($argumentVar) {
+    $localVarA = 3;
+    return $argumentVar + $localVarA;
+}
+
+function functionB() {
+    $localVarB = 5;
+    return functionB($localVarB);
+}
+
+$localVarMainA = "local value";
+$localVarMainB = functionB();
+$localVarMainA = functionA($localVarMainA);
\ No newline at end of file
diff --git a/tests/before/MultipleClasses.php b/tests/before/MultipleClasses.php
new file mode 100644
index 0000000..f499458
--- /dev/null
+++ b/tests/before/MultipleClasses.php
@@ -0,0 +1,38 @@
+<?php
+
+class FirstClass {
+
+    protected $_protectedProperty;
+    public $publicProperty;
+
+    protected function _protectedMethod() {
+        echo "This is protected method of first class";
+    }
+
+    public function publicMethod() {
+        echo "This is public method of first class";
+    }
+}
+
+class SecondClass extends FirstClass {
+
+    private $_privateProperty;
+
+    protected function _protectedMethod() {
+        parent::_protectedMethod();
+        echo "This is protected method of second class";
+        $this->_privateProperty = parent::$_protectedProperty;
+    }
+
+    public function publicMethod() {
+        parent::publicMethod();
+        echo "This is public method of second class";
+        $this->_privateProperty = parent::$publicProperty;
+    }
+}
+
+class ThirdClass {
+    public function __construct(SecondClass $secondObject) {
+        $secondObject->publicMethod();
+    }
+}
\ No newline at end of file
diff --git a/tests/before/Namespaces.php b/tests/before/Namespaces.php
new file mode 100644
index 0000000..a0fa731
--- /dev/null
+++ b/tests/before/Namespaces.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace namespaceA;
+
+class classA {
+
+}
+
+namespace namespaceB;
+
+use namespaceA;
+
+class classB {
+    private $_objectA;
+
+    public function __construct() {
+        $this->_objectA = new namespaceA\classA();
+    }
+}
\ No newline at end of file
diff --git a/tests/before/SimpleClass.php b/tests/before/SimpleClass.php
new file mode 100644
index 0000000..e18cb00
--- /dev/null
+++ b/tests/before/SimpleClass.php
@@ -0,0 +1,34 @@
+<?php
+
+class SimpleClass {
+
+    private $_privateProperty;
+    protected $_protectedProperty;
+    public $publicProperty;
+
+    private function _privateMethod() {
+        $localVar = "test";
+        $this->_privateProperty = $localVar;
+        $this->_protectedProperty = $localVar;
+        $this->publicProperty = $localVar;
+    }
+
+    protected function _protectedMethod() {
+        $localVar = "test";
+        $this->_privateProperty = $localVar;
+        $this->_protectedProperty = $localVar;
+        $this->publicProperty = $localVar;
+    }
+
+    public function publicMethod() {
+        $localVar = "test";
+        $this->_privateProperty = $localVar;
+        $this->_protectedProperty = $localVar;
+        $this->publicProperty = $localVar;
+        $this->_protectedMethod();
+        $this->_privateMethod();
+    }
+}
+
+$simpleObject = new SimpleClass();
+$simpleObject->publicMethod();
\ No newline at end of file
diff --git a/tests/config.yml b/tests/config.yml
new file mode 100644
index 0000000..1fe8f32
--- /dev/null
+++ b/tests/config.yml
@@ -0,0 +1,7 @@
+services:
+
+    # String scrambler
+    obfuscator.scrambler:
+        class: Naneau\Obfuscator\StringScrambler
+        arguments:
+            - 'salt'
\ No newline at end of file
diff --git a/tests/expected/Functions.php b/tests/expected/Functions.php
new file mode 100644
index 0000000..638da32
--- /dev/null
+++ b/tests/expected/Functions.php
@@ -0,0 +1,2 @@
+<?php
+function functionA($spc5a579) { $sp0edd21 = 3; return $spc5a579 + $sp0edd21; } function functionB() { $sp6a6761 = 5; return functionB($sp6a6761); } $sp8851f9 = 'local value'; $sp7f60ff = functionB(); $sp8851f9 = functionA($sp8851f9);
\ No newline at end of file
diff --git a/tests/expected/MultipleClasses.php b/tests/expected/MultipleClasses.php
new file mode 100644
index 0000000..cca2025
--- /dev/null
+++ b/tests/expected/MultipleClasses.php
@@ -0,0 +1,2 @@
+<?php
+class FirstClass { protected $_protectedProperty; public $publicProperty; protected function _protectedMethod() { echo 'This is protected method of first class'; } public function publicMethod() { echo 'This is public method of first class'; } } class SecondClass extends FirstClass { private $_privateProperty; protected function _protectedMethod() { parent::_protectedMethod(); echo 'This is protected method of second class'; $this->_privateProperty = parent::$_protectedProperty; } public function publicMethod() { parent::publicMethod(); echo 'This is public method of second class'; $this->_privateProperty = parent::$publicProperty; } } class ThirdClass { public function __construct(SecondClass $spb91639) { $spb91639->publicMethod(); } }
\ No newline at end of file
diff --git a/tests/expected/Namespaces.php b/tests/expected/Namespaces.php
new file mode 100644
index 0000000..3711777
--- /dev/null
+++ b/tests/expected/Namespaces.php
@@ -0,0 +1,2 @@
+<?php
+namespace namespaceA; class classA { } namespace namespaceB; use namespaceA; class classB { private $_objectA; public function __construct() { $this->_objectA = new namespaceA\classA(); } }
\ No newline at end of file
diff --git a/tests/expected/SimpleClass.php b/tests/expected/SimpleClass.php
new file mode 100644
index 0000000..8ca200b
--- /dev/null
+++ b/tests/expected/SimpleClass.php
@@ -0,0 +1,2 @@
+<?php
+class SimpleClass { private $_privateProperty; protected $_protectedProperty; public $publicProperty; private function sp51fa3f() { $spd8dce8 = 'test'; $this->_privateProperty = $spd8dce8; $this->_protectedProperty = $spd8dce8; $this->publicProperty = $spd8dce8; } protected function _protectedMethod() { $spd8dce8 = 'test'; $this->_privateProperty = $spd8dce8; $this->_protectedProperty = $spd8dce8; $this->publicProperty = $spd8dce8; } public function publicMethod() { $spd8dce8 = 'test'; $this->_privateProperty = $spd8dce8; $this->_protectedProperty = $spd8dce8; $this->publicProperty = $spd8dce8; $this->_protectedMethod(); $this->sp51fa3f(); } } $sp5de0e2 = new SimpleClass(); $sp5de0e2->publicMethod();
\ No newline at end of file
diff --git a/tests/phpunit.php b/tests/phpunit.php
new file mode 100644
index 0000000..6515b5c
--- /dev/null
+++ b/tests/phpunit.php
@@ -0,0 +1,9 @@
+<?php
+
+include __DIR__ . '/../vendor/autoload.php';
+
+function autoLoader($className) {
+    include __DIR__ . "\\..\\" . strtolower($className) . '.php';
+}
+
+spl_autoload_register('autoLoader');
\ No newline at end of file