Add contains string to FlipAssertRector (#444)

* add failing fixture

* add contains string to flip assert

* [ci-review] Rector Rectify

---------

Co-authored-by: GitHub Action <actions@github.com>

Author: TomasVotruba

rules-tests/CodeQuality/Rector/MethodCall/FlipAssertRector/Fixture/cover_static_call.php.inc

@@ -0,0 +1,33 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\FlipAssertRector\Fixture;
+
+use PHPUnit\Framework\Assert;
+
+final class CoverStaticCall extends \PHPUnit\Framework\TestCase
+{
+    public function test()
+    {
+        $result = '...';
+        Assert::assertStringContainsString($result, 'expected');
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\FlipAssertRector\Fixture;
+
+use PHPUnit\Framework\Assert;
+
+final class CoverStaticCall extends \PHPUnit\Framework\TestCase
+{
+    public function test()
+    {
+        $result = '...';
+        Assert::assertStringContainsString('expected', $result);
+    }
+}
+
+?>

rules/CodeQuality/Rector/MethodCall/FlipAssertRector.php

@@ -78,7 +78,10 @@ public function getNodeTypes(): array
      */
     public function refactor(Node $node): ?Node
     {
-        if (! $this->testsNodeAnalyzer->isPHPUnitMethodCallNames($node, ['assertSame', 'assertEquals'])) {
+        if (! $this->testsNodeAnalyzer->isPHPUnitMethodCallNames(
+            $node,
+            ['assertSame', 'assertEquals', 'assertStringContainsString']
+        )) {
             return null;
         }