From d2ccc2d15ef4bf6ee21786b1328c77cd4c3aed00 Mon Sep 17 00:00:00 2001
From: Dennis Eichhorn <spl1nes.com@googlemail.com>
Date: Sun, 13 Sep 2020 20:38:03 +0200
Subject: [PATCH] add test for invalid item

---
 .../Marketing/ArticleCorrelationAffinityTest.php | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/Business/Marketing/ArticleCorrelationAffinityTest.php b/tests/Business/Marketing/ArticleCorrelationAffinityTest.php
index 9f53e484a..203beadfc 100644
--- a/tests/Business/Marketing/ArticleCorrelationAffinityTest.php
+++ b/tests/Business/Marketing/ArticleCorrelationAffinityTest.php
@@ -68,4 +68,20 @@ class ArticleCorrelationAffinityTest extends \PHPUnit\Framework\TestCase
             0.001
         );
     }
+
+    /**
+     * @testdox The affinity of a new article is empty
+     * @group framework
+     */
+    public function testInvalidItemAffinity() : void
+    {
+        $orders = [
+            ['A' => 1, 'B' => 1, 'C' => 0, 'D' => 0],
+            ['A' => 0, 'B' => 1, 'C' => 0, 'D' => 0],
+        ];
+
+        $aff = new ArticleCorrelationAffinity($orders);
+
+        self::assertEquals([], $aff->getAffinity('Z'));
+    }
 }