MC-37476: mismatching strict type

Author: Oleksandr Iegorov

app/code/Magento/PageBuilder/Test/Unit/Plugin/Filter/TemplatePluginTest.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\PageBuilder\Test\Unit\Plugin\Filter;
+
+use Magento\PageBuilder\Model\Filter\Template as TemplateFilter;
+use Magento\Framework\Filter\Template as FrameworkTemplateFilter;
+use Magento\PageBuilder\Plugin\Filter\TemplatePlugin;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test for page builder template filter plugin
+ */
+class TemplatePluginTest extends TestCase
+{
+    /**
+     * @var FrameworkTemplateFilter|MockObject
+     */
+    private $frameworkTemplateFilter;
+
+    /**
+     * @var TemplateFilter|MockObject
+     */
+    private $templateFilter;
+
+    /**
+     * @var TemplatePlugin
+     */
+    private $templatePlugin;
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->frameworkTemplateFilter = $this->createMock(FrameworkTemplateFilter::class);
+        $this->templateFilter = $this->createMock(TemplateFilter::class);
+        $this->templatePlugin = new TemplatePlugin($this->templateFilter);
+    }
+
+    public function testAfterFilter(): void
+    {
+        $result = null;
+        $this->templateFilter->expects($this->once())
+            ->method('filter')
+            ->with('')
+            ->willReturn('');
+        $this->assertSame('', $this->templatePlugin->afterFilter($this->frameworkTemplateFilter, $result));
+    }
+
+    /**
+     * @return array
+     */
+    public function afterLoginDataProvider(): array
+    {
+        return [
+            [false],
+            [true],
+        ];
+    }
+}