Adding unloadDict() method

Author: mwatson

src/BoggleSolver.php

@@ -276,6 +276,11 @@ public function findWordsFromOneTile($boardPtr, $dictPtr = null, &$words = array
         return $words;
     }
 
+    public function unloadDict()
+    {
+        $this->dict = array();
+    }
+
     // @codeCoverageIgnoreStart
     public function getDictFileContents()
     {

tests/BoggleSolver/BoggleSolverTest.php

@@ -53,6 +53,11 @@ public function testLoadDictBuildsDictionary()
         );
 
         $this->assertEquals($expectedDict, $solverMock->dict);
+
+        // lazy
+        $solverMock->unloadDict();
+
+        $this->assertEquals(array(), $solverMock->dict);
     }
 
     public function testLoadBoardLoadsBoard()