Initial commit，修正

vendor/yiisoft/yii2-bootstrap5/tests/ButtonGroupTest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace yiiunit\extensions\bootstrap5;
+
+use yii\bootstrap5\Button;
+use yii\bootstrap5\ButtonGroup;
+
+/**
+ * @group bootstrap5
+ */
+class ButtonGroupTest extends TestCase
+{
+    public function testContainerOptions()
+    {
+        ButtonGroup::$counter = 0;
+        $out = ButtonGroup::widget([
+            'buttons' => [
+                ['label' => 'button-A'],
+                ['label' => 'button-B', 'visible' => true],
+                ['label' => 'button-C', 'visible' => false],
+                Button::widget(['label' => 'button-D']),
+            ],
+        ]);
+
+        $expected = <<<HTML
+<div id="w1" class="btn-group" role="group"><button type="button" id="w2" class="btn">button-A</button>
+<button type="button" id="w3" class="btn">button-B</button>
+<button id="w0" class="btn">button-D</button></div>
+HTML;
+
+
+        $this->assertEqualsWithoutLE($expected, $out);
+    }
+}