#7674 Add a test

tests/PHPUnit/Integration/Tracker/Visit/ReferrerSpamFilterTest.php

+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Tests\Integration\Tracker\Visit;
+
+use Piwik\Option;
+use Piwik\Tests\Framework\TestCase\IntegrationTestCase;
+use Piwik\Tracker\Request;
+use Piwik\Tracker\Visit\ReferrerSpamFilter;
+
+/**
+ * @group Tracker
+ * @group Visit
+ */
+class ReferrerSpamFilterTest extends IntegrationTestCase
+{
+    /**
+     * @var ReferrerSpamFilter
+     */
+    private $filter;
+
+    public function setUp()
+    {
+        parent::setUp();
+        $this->filter = new ReferrerSpamFilter;
+    }
+
+    /**
+     * @test
+     */
+    public function should_detect_spam()
+    {
+        $request = new Request(array(
+            'urlref' => 'semalt.com',
+        ));
+
+        $this->assertTrue($this->filter->isSpam($request));
+    }
+
+    /**
+     * @test
+     */
+    public function should_ignore_valid_referrers()
+    {
+        $request = new Request(array(
+            'urlref' => 'google.com',
+        ));
+
+        $this->assertFalse($this->filter->isSpam($request));
+    }
+
+    /**
+     * @test
+     */
+    public function should_ignore_requests_with_empty_referrers()
+    {
+        $request = new Request(array());
+
+        $this->assertFalse($this->filter->isSpam($request));
+    }
+
+    /**
+     * @test
+     */
+    public function should_load_spammer_list_from_options_if_exists()
+    {
+        // We store google.com in the spammer blacklist
+        $list = serialize(array(
+            'google.com',
+        ));
+        Option::set(ReferrerSpamFilter::OPTION_STORAGE_NAME, $list);
+
+        $request = new Request(array(
+            'urlref' => 'semalt.com',
+        ));
+        $this->assertFalse($this->filter->isSpam($request));
+
+        // Now Google is blacklisted
+        $request = new Request(array(
+            'urlref' => 'google.com',
+        ));
+        $this->assertTrue($this->filter->isSpam($request));
+
+        Option::delete(ReferrerSpamFilter::OPTION_STORAGE_NAME);
+    }
+}