Added new ArrayDataSet for unit tests purposes

tests/ArrayDataSet.php

@@ -0,0 +1,62 @@
+<?php
+/**
+ * @link https://github.com/creocoder/yii2-nested-sets-behavior
+ * @copyright Copyright (c) 2015 Alexander Kochetov
+ * @license http://opensource.org/licenses/BSD-3-Clause
+ */
+
+namespace tests;
+
+/**
+ * ArrayDataSet
+ */
+class ArrayDataSet extends \PHPUnit_Extensions_Database_DataSet_AbstractDataSet
+{
+    /**
+     * @var array
+     */
+    protected $tables = array();
+
+    /**
+     * @param array $data
+     */
+    public function __construct(array $data)
+    {
+        foreach ($data AS $tableName => $rows) {
+            $columns = array();
+
+            if (isset($rows[0])) {
+                $columns = array_keys($rows[0]);
+            }
+
+            $metaData = new \PHPUnit_Extensions_Database_DataSet_DefaultTableMetaData($tableName, $columns);
+            $table = new \PHPUnit_Extensions_Database_DataSet_DefaultTable($metaData);
+
+            foreach ($rows AS $row) {
+                $table->addRow($row);
+            }
+
+            $this->tables[$tableName] = $table;
+        }
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function createIterator($reverse = false)
+    {
+        return new \PHPUnit_Extensions_Database_DataSet_DefaultTableIterator($this->tables, $reverse);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getTable($tableName)
+    {
+        if (!isset($this->tables[$tableName])) {
+            throw new \InvalidArgumentException("$tableName is not a table in the current database.");
+        }
+
+        return $this->tables[$tableName];
+    }
+}