TASK: Add new tests for filter setting on model

Tests/Unit/Domain/Model/SearchRequestTest.php

@@ -0,0 +1,80 @@
+<?php
+namespace Codappix\SearchCore\Tests\Unit\Domain\Model;
+
+/*
+ * Copyright (C) 2017  Daniel Siepmann <coding@daniel-siepmann.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+use Codappix\SearchCore\Domain\Model\SearchRequest;
+use Codappix\SearchCore\Tests\Unit\AbstractUnitTestCase;
+
+class SearchRequestTest extends AbstractUnitTestCase
+{
+    /**
+     * @test
+     * @dataProvider possibleEmptyFilter
+     */
+    public function emptyFilterWillNotBeSet(array $filter)
+    {
+        $searchRequest = new SearchRequest();
+        $searchRequest->setFilter($filter);
+
+        $this->assertSame(
+            [],
+            $searchRequest->getFilter(),
+            'Empty filter were set, even if they should not.'
+        );
+    }
+
+    public function possibleEmptyFilter()
+    {
+        return [
+            'Complete empty Filter' => [
+                'filter' => [],
+            ],
+            'Single filter with empty value' => [
+                'filter' => [
+                    'someFilter' => '',
+                ],
+            ],
+            'Single filter with empty recursive values' => [
+                'filter' => [
+                    'someFilter' => [
+                        'someKey' => '',
+                    ],
+                ],
+            ],
+        ];
+    }
+
+    /**
+     * @test
+     */
+    public function filterIsSet()
+    {
+        $filter = ['someField' => 'someValue'];
+        $searchRequest = new SearchRequest();
+        $searchRequest->setFilter($filter);
+
+        $this->assertSame(
+            $filter,
+            $searchRequest->getFilter(),
+            'Filter was not set.'
+        );
+    }
+}