Fix broken snake-case conversion of __call use-cases (#18)

src/Nodes/AbstractNode.php

@@ -369,13 +369,13 @@ public function __call(string $methodName, array $arguments)
          */
         foreach ($arguments as $arg) {
             if ($arg instanceof PathExp || $arg instanceof self) {
-                $rule = new LazyRuleStringify($methodName, $arguments);
+                $rule = new LazyRuleStringify($ruleName, $arguments);
                 break;
             }
         }
 
         if (!$rule instanceof LazyRuleStringify) {
-            $rule = sprintf('%s:%s', $methodName, implode(',', $arguments));
+            $rule = sprintf('%s:%s', $ruleName, implode(',', $arguments));
         }
 
         $this->rules[] = $rule;

tests/AutoSnakeCaseTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Square\Hyrule\Tests;
+
+use Monolog\Test\TestCase;
+use Square\Hyrule\Hyrule;
+use Square\Hyrule\Nodes\StringNode;
+
+class AutoSnakeCaseTest extends TestCase
+{
+    /**
+     * @param string $camelCase
+     * @param array<mixed> $args
+     * @param string $expected
+     * @return void
+     * @dataProvider data
+     */
+    public function testAutoSnakeCase(string $camelCase, array $args, string $expected): void
+    {
+        $node = Hyrule::create()
+            ->string('foo')
+            ->$camelCase(...$args);
+        assert($node instanceof StringNode);
+        $rules = $node->build();
+        $this->assertEquals($expected, $rules['foo'][1]);
+    }
+
+    /**
+     * @return array<mixed>
+     */
+    public static function data(): array
+    {
+        return [
+            [
+                'hello',
+                [],
+                'hello',
+            ],
+            [
+                'helloWorld',
+                [],
+                'hello_world',
+            ],
+            [
+                'helloWorld',
+                [1, 2, 3],
+                'hello_world:1,2,3',
+            ],
+            [
+                'helloBeautifulWorld',
+                [],
+                'hello_beautiful_world',
+            ],
+            [
+                'helloBeautifulWorld',
+                ['a', 'b', 'c'],
+                'hello_beautiful_world:a,b,c',
+            ],
+        ];
+    }
+}