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vendor/phpoffice/math/tests/Math/Element/AbstractGroupElementTest.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\PhpOffice\Math\Element;
+
+use PhpOffice\Math\Element;
+use PHPUnit\Framework\TestCase;
+
+class AbstractGroupElementTest extends TestCase
+{
+    public function testConstruct(): void
+    {
+        $row = new Element\Row();
+
+        $this->assertIsArray($row->getElements());
+        $this->assertCount(0, $row->getElements());
+    }
+
+    public function testAdd(): void
+    {
+        $identifierA = new Element\Identifier('a');
+        $row = new Element\Row();
+
+        $this->assertCount(0, $row->getElements());
+
+        $this->assertInstanceOf(Element\AbstractGroupElement::class, $row->add($identifierA));
+
+        $this->assertCount(1, $row->getElements());
+        $this->assertEquals([$identifierA], $row->getElements());
+    }
+
+    public function testRemove(): void
+    {
+        $identifierA = new Element\Identifier('a');
+
+        $row = new Element\Row();
+        $row->add($identifierA);
+
+        $this->assertCount(1, $row->getElements());
+
+        $this->assertInstanceOf(Element\AbstractGroupElement::class, $row->remove($identifierA));
+
+        $this->assertCount(0, $row->getElements());
+    }
+}