release: v3.1.0 premium smart core engines and 14 new accessibility rules

tests/Core/VisualDiffGeneratorTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Tests\Core;
+
+use PHPUnit\Framework\TestCase;
+use YakNet\AccessibilityConsole\Core\Diff\VisualDiffGenerator;
+
+class VisualDiffGeneratorTest extends TestCase
+{
+    public function testGeneratesVisualDiff(): void
+    {
+        $generator = new VisualDiffGenerator();
+        $original = "hello world\nfoo\n";
+        $fixed = "hello world\nbar\n";
+
+        $diff = $generator->generate($original, $fixed);
+
+        $this->assertStringContainsString('--- Original', $diff);
+        $this->assertStringContainsString('+++ Healed', $diff);
+        $this->assertStringContainsString('<fg=red>-foo', $diff);
+        $this->assertStringContainsString('<fg=green>+bar', $diff);
+    }
+}