Add test cases for trait method collision resolution with insteadof and as alias

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

tests/PHPStan/Rules/Classes/data/trait-method-collisions.php

@@ -75,3 +75,44 @@ class PartialCollision
 {
 	use TraitC, TraitD;
 }
+
+trait TraitE
+{
+	public function smallTalk(): void
+	{
+	}
+
+	public function bigTalk(): void
+	{
+	}
+}
+
+trait TraitF
+{
+	public function smallTalk(): void
+	{
+	}
+
+	public function bigTalk(): void
+	{
+	}
+}
+
+// Should not report - all collisions resolved via insteadof in both directions
+class Talker
+{
+	use TraitE, TraitF {
+		TraitF::smallTalk insteadof TraitE;
+		TraitE::bigTalk insteadof TraitF;
+	}
+}
+
+// Should not report - collisions resolved via insteadof with alias
+class AliasedTalker
+{
+	use TraitE, TraitF {
+		TraitF::smallTalk insteadof TraitE;
+		TraitE::bigTalk insteadof TraitF;
+		TraitF::bigTalk as talk;
+	}
+}