TypeHintHelper: Fixed internal error

Author: kukulich

SlevomatCodingStandard/Helpers/TypeHintHelper.php

@@ -103,6 +103,10 @@ public static function isTemplate(File $phpcsFile, int $docCommentOpenPointer, s
 
 		$classPointer = ClassHelper::getClassPointer($phpcsFile, $pointerToFindClass);
 
+		if ($classPointer === null) {
+			return false;
+		}
+
 		$classDocCommentOpenPointer = DocCommentHelper::findDocCommentOpenToken($phpcsFile, $classPointer);
 		if ($classDocCommentOpenPointer === null) {
 			return false;

tests/Helpers/TypeHintHelperTest.php

@@ -3,6 +3,7 @@
 namespace SlevomatCodingStandard\Helpers;
 
 use function preg_split;
+use const T_DOC_COMMENT_OPEN_TAG;
 
 class TypeHintHelperTest extends TestCase
 {
@@ -283,4 +284,30 @@ public function testMethodParameterTypeHintWithoutNamespace(): void
 		self::assertSame('\Doctrine\ORM\Mapping\Id', TypeHintHelper::getFullyQualifiedTypeHint($phpcsFile, $methodPointer, $parameterTypeHint->getTypeHint()));
 	}
 
+	/**
+	 * @return mixed[][]
+	 */
+	public function dataIsTemplate(): array
+	{
+		return [
+			['Whatever', false],
+		];
+	}
+
+	/**
+	 * @dataProvider dataIsTemplate
+	 * @param string $typeHintName
+	 * @param bool $isTemplate
+	 */
+	public function testIsTemplate(string $typeHintName, bool $isTemplate): void
+	{
+		$phpcsFile = $this->getCodeSnifferFile(__DIR__ . '/data/typeHintTemplates.php');
+
+		$docCommentOpenPointer = $this->findPointerByLineAndType($phpcsFile, 3, T_DOC_COMMENT_OPEN_TAG);
+
+		self::assertNotNull($docCommentOpenPointer);
+
+		self::assertSame($isTemplate, TypeHintHelper::isTemplate($phpcsFile, $docCommentOpenPointer, $typeHintName));
+	}
+
 }

tests/Helpers/data/typeHintTemplates.php

@@ -0,0 +1,8 @@
+<?php
+
+/**
+ * @return Whatever
+ */
+function simpleFunction() {
+
+}