Added MySqlRandom Sort & invalidated collections upon adding custom sorts

Author: samnotsowise

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Change Log
 
+### 1.8.8
+
+* Fixed: Custom sorts now invalidate collections
+* Added: MySqlRandom Sort
+
 ### 1.8.7
 
 * Fixed:   Added value inspection to determine type when unit testing and no column

src/Collections/Collection.php

@@ -363,6 +363,7 @@ final public function replaceCustomSort(Sort $sort)
     final public function addCustomSort(Sort $sort)
     {
         $this->sorts[] = $sort;
+        $this->invalidate();
     }
 
     /**

src/Repositories/MySql/Sorts/MySqlRandom.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Rhubarb\Stem\Repositories\MySql\Sorts;
+
+use Rhubarb\Stem\Collections\Sort;
+use Rhubarb\Stem\Sql\ExpressesSqlInterface;
+
+class MySqlRandom extends Sort implements ExpressesSqlInterface {
+    public function getSqlExpression()
+    {
+        return 'RAND()';
+    }
+}

tests/unit/Repositories/MySql/Sorts/MySqlRandomTest.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Rhubarb\Stem\Tests\unit\Repositories\MySql\Sorts;
+
+use Rhubarb\Crown\Tests\Fixtures\TestCases\RhubarbTestCase;
+use Rhubarb\Stem\Repositories\MySql\Sorts\MySqlRandom;
+
+class MySqlRandomTest extends RhubarbTestCase
+{
+    public function testCustomSortSQL()
+    {
+        $this->assertEquals('RAND()', (new MySqlRandom())->getSqlExpression());
+    }
+}