.

src/arenas/tron/test/DirectionTest.php

@@ -1 +1,64 @@
 <?php
+use PHPUnit\Framework\TestCase;
+require_once '../Direction.php';
+
+class Directiontest extends TestCase {
+  public function invalidStrings() {
+    return array(
+      array('jhgjhg'),
+      array('X+'),
+      array(4)
+    );
+   }
+    /**
+      * @dataProvider invalidStrings
+      * @expectedException invalidDirectionException
+      */
+  public function testRejectInvalidString($invalidString){
+    Direction::make($invalidString);
+  }
+  public function validStrings(){
+    return array(
+      array('x+'),
+      array('y+'),
+      array('x-'),
+      array('y-'),
+    );
+  }
+  
+  /**
+    * @dataProvider validStrings
+    */
+  public function testAcceptValidString($validString){
+    $this->assertInstanceOf(Direction::class,Direction::make($validString));
+  }
+  
+  /**
+    * @dataProvider validStrings
+    */
+  public function testToString($validString){
+    $this->assertTrue(Direction::make($validString) == $validString);
+  }
+  
+  /**
+    * @dataProvider validStrings
+    */
+  public function testOpposite($validString){
+    $dir = Direction::make($validString);
+    $op = $dir->opposite();
+    
+    $this->assertInstanceOf(Direction::class,$op);
+    $this->assertFalse($dir == $op);
+  }
+  
+  /**
+    * @dataProvider validStrings
+    */  
+  public function testOppositeOpposite($validString){
+    $dir = Direction::make($validString);
+    $opop = $dir->opposite()->opposite();
+    $this->assertTrue($dir == $opop);
+  }
+  
+
+}