Allow \Blade::stringable() to be called on native Iterables (#49591)

Author: tsjason

src/Illuminate/View/Compilers/Concerns/CompilesEchos.php

@@ -162,6 +162,10 @@ public function applyEchoHandler($value)
             return call_user_func($this->echoHandlers[get_class($value)], $value);
         }
 
+        if (is_iterable($value) && isset($this->echoHandlers['iterable'])) {
+            return call_user_func($this->echoHandlers['iterable'], $value);
+        }
+
         return $value;
     }
 }

tests/View/Blade/BladeEchoHandlerTest.php

@@ -80,6 +80,34 @@ public static function handlerLogicDataProvider()
         ];
     }
 
+    /**
+     * @dataProvider handlerWorksWithIterableDataProvider
+     */
+    public function testHandlerWorksWithIterables($blade, $closure, $expectedOutput)
+    {
+        $this->compiler->stringable('iterable', $closure);
+
+        app()->singleton('blade.compiler', function () {
+            return $this->compiler;
+        });
+
+        ob_start();
+        eval(Str::of($this->compiler->compileString($blade))->remove(['<?php', '?>']));
+        $output = ob_get_contents();
+        ob_end_clean();
+
+        $this->assertSame($expectedOutput, $output);
+    }
+
+    public static function handlerWorksWithIterableDataProvider()
+    {
+        return [
+            ['{{[1,"two",3]}}', function(iterable $arr) {
+                return implode(', ', $arr);
+            }, "1, two, 3"],
+        ];
+    }
+
     /**
      * @dataProvider nonStringableDataProvider
      */