Support guard

Author: VincentLanglet

src/Parser.php

@@ -494,11 +494,28 @@ public function getTest(int $line): TwigTest
             // try 2-words tests
             $name = $name.' '.$this->getCurrentToken()->getValue();
 
-            if ($test = $this->env->getTest($name)) {
+            try {
+                $test = $this->env->getTest($name);
+            } catch (SyntaxError $e) {
+                if (!$this->shouldIgnoreUnknownTwigCallables()) {
+                    throw $e;
+                }
+
+                $test = null;
+            }
+            if ($test) {
                 $this->stream->next();
             }
         } else {
-            $test = $this->env->getTest($name);
+            try {
+                $test = $this->env->getTest($name);
+            } catch (SyntaxError $e) {
+                if (!$this->shouldIgnoreUnknownTwigCallables()) {
+                    throw $e;
+                }
+
+                $test = null;
+            }
         }
 
         if (!$test) {

src/Test/IntegrationTestCase.php

@@ -101,6 +101,14 @@ protected function getUndefinedFunctionCallbacks(): array
         return [];
     }
 
+    /**
+     * @return array<callable(string): (TwigTest|false)>
+     */
+    protected function getUndefinedTestCallbacks(): array
+    {
+        return [];
+    }
+
     /**
      * @return array<callable(string): (TokenParserInterface|false)>
      */

tests/Fixtures/tags/guard/throwing_handler.test

@@ -14,9 +14,18 @@
 {% else -%}
     The throwing_undefined_function function doesn't exist
 {% endguard %}
+
+{% guard function throwing_undefined_test -%}
+    NEVER
+    {{ 'a' is throwing_undefined_test('b') }}
+{% else -%}
+    The throwing_undefined_test function doesn't exist
+{% endguard %}
 --DATA--
 return []
 --EXPECT--
 The throwing_undefined_filter filter doesn't exist
 
 The throwing_undefined_function function doesn't exist
+
+The throwing_undefined_test function doesn't exist

tests/IntegrationTest.php

@@ -72,6 +72,19 @@ static function (string $name) {
         ];
     }
 
+    protected function getUndefinedTestCallbacks(): array
+    {
+        return [
+            static function (string $name) {
+                if ('throwing_undefined_test' === $name) {
+                    throw new SyntaxError('This test is undefined in the tests.');
+                }
+
+                return false;
+            },
+        ];
+    }
+
     protected function getUndefinedTokenParserCallbacks(): array
     {
         return [