ISSUE #1557: Fix A LineString must be composed of at least 2 points

Author: robiningelbrecht

tests/Domain/Activity/Stream/ActivityStreamTest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Tests\Domain\Activity\Stream;
+
+use PHPUnit\Framework\TestCase;
+
+class ActivityStreamTest extends TestCase
+{
+    public function testApplySimpleMovingAverage(): void
+    {
+        $activityStream = ActivityStreamBuilder::fromDefaults()
+            ->withData([])
+            ->build();
+
+        $this->assertEquals(
+            $activityStream,
+            $activityStream->applySimpleMovingAverage(10),
+        );
+    }
+}