test(Str): add testWrapEdgeCases covering wrap edge scenarios (#57861)

Author: miladev95

tests/Support/SupportStrTest.php

@@ -560,6 +560,17 @@ public function testWrap()
         $this->assertEquals('foo-bar-baz', Str::wrap('-bar-', 'foo', 'baz'));
     }
 
+    public function testWrapEdgeCases()
+    {
+        $this->assertSame('[]mid[]', Str::wrap('mid', '[]'));
+        $this->assertSame('(mid', Str::wrap('mid', '(', ''));
+        $this->assertSame('<mid<', Str::wrap('mid', '<'));
+        $this->assertSame('value', Str::wrap('value', ''));
+        $this->assertSame('[][]', Str::wrap('', '[]'));
+        $this->assertSame('«値»', Str::wrap('値', '«', '»'));
+        $this->assertSame('🧪X🧪', Str::wrap('X', '🧪'));
+    }
+
     public function testUnwrap()
     {
         $this->assertEquals('value', Str::unwrap('"value"', '"'));