Update src/Map/tests/Cluster/GridClusteringAlgorithmTest.php

Co-authored-by: Hugo Alliaume <hugo@alliau.me>

Author: smnandre

src/Map/tests/Cluster/GridClusteringAlgorithmTest.php

@@ -58,11 +58,9 @@ public function testPointsInDifferentGridsAreNotClustered(): void
         $point2 = new Point(-10.0, -20.0); // Far away
         $algorithm = new GridClusteringAlgorithm();
 
-        // High zoom
-        // Expect two separate clusters
         $clusters = $algorithm->cluster([$point1, $point2], 5.0);
 
-        $this->assertCount(2, $clusters);
+        $this->assertCount(2, $clusters, 'Two clusters should have created due to the high zoom value.');
     }
 
     public function testEmptyPointsArray(): void