Fix undefined variable in condition statement

pug-php/pug#186

Author: kylekatarnls

composer.json

@@ -22,7 +22,7 @@
     "require": {
         "php": ">=5.5.0",
         "phug/util": "^0.4.0",
-        "phug/formatter": "^0.5.0",
+        "phug/formatter": "^0.5.37",
         "phug/dependency-injection": "^1.1.2",
         "phug/parser": "^0.5.0"
     },

src/Phug/Compiler/NodeCompiler/ConditionalNodeCompiler.php

@@ -26,6 +26,6 @@ public function compileNode(NodeInterface $node, ElementInterface $parent = null
             $subject = '!('.$subject.')';
         }
 
-        return $this->wrapStatement($node, $name, $subject);
+        return $this->wrapStatement($node, $name, $subject)->check();
     }
 }

tests/Phug/Compiler/NodeCompiler/ConditionalNodeCompilerTest.php

@@ -20,11 +20,11 @@ public function testCompile()
     {
         $this->assertCompile(
             [
-                '<?php if ($foo > 50) { ?>',
+                '<?php if ((isset($foo) ? $foo : null) > 50) { ?>',
                 '<p>Huge foo</p>',
-                '<?php } elseif ($foo > 20) { ?>',
+                '<?php } elseif ((isset($foo) ? $foo : null) > 20) { ?>',
                 '<p>Big foo</p>',
-                '<?php } elseif ($foo > 10) { ?>',
+                '<?php } elseif ((isset($foo) ? $foo : null) > 10) { ?>',
                 '<p>Medium foo</p>',
                 '<?php } else { ?>',
                 '<p>Small foo</p>',
@@ -43,7 +43,7 @@ public function testCompile()
         );
         $this->assertCompile(
             [
-                '<?php if (!($foo % 1)) { ?>',
+                '<?php if (!((isset($foo) ? $foo : null) % 1)) { ?>',
                 '<p>Even foo</p>',
                 '<?php } else { ?>',
                 '<p>Odd foo</p>',

tests/Phug/Compiler/NodeCompiler/EachNodeCompilerTest.php

@@ -36,7 +36,7 @@ public function testCompile()
                 '<?php $__pug_temp_empty = false ?>',
                 '<p><?= $item ?></p>',
                 '<?php } ?>',
-                '<?php if ($__pug_temp_empty) { ?>',
+                '<?php if ((isset($__pug_temp_empty) ? $__pug_temp_empty : null)) { ?>',
                 '<p>no items</p>',
                 '<?php } ?>',
             ],

tests/Phug/Compiler/NodeCompiler/ForNodeCompilerTest.php

@@ -42,7 +42,7 @@ public function testCompile()
                 '<?php $__pug_temp_empty = false ?>',
                 '<p><?= $item ?></p>',
                 '<?php } ?>',
-                '<?php if ($__pug_temp_empty) { ?>',
+                '<?php if ((isset($__pug_temp_empty) ? $__pug_temp_empty : null)) { ?>',
                 '<p>no items</p>',
                 '<?php } ?>',
             ],
@@ -59,7 +59,7 @@ public function testCompile()
                 '<?php $__pug_temp_empty = false ?>',
                 '<p><?= $item ?></p>',
                 '<?php } ?>',
-                '<?php if ($__pug_temp_empty) { ?>',
+                '<?php if ((isset($__pug_temp_empty) ? $__pug_temp_empty : null)) { ?>',
                 '<p>no items</p>',
                 '<?php } ?>',
             ],