NamingConventions/ValidFunctionName: rename test case file

This is necessary to be able to create more test case files with syntax errors in a future commit.

WordPress/Tests/NamingConventions/ValidFunctionNameUnitTest.php

@@ -25,9 +25,13 @@ final class ValidFunctionNameUnitTest extends AbstractSniffUnitTest {
 	/**
 	 * Returns the lines where errors should occur.
 	 *
+	 * @param string $testFile The name of the file being tested.
+	 *
 	 * @return array<int, int> Key is the line number, value is the number of expected errors.
 	 */
-	public function getErrorList() {
+	public function getErrorList( $testFile = '' ) {
+		switch ( $testFile ) {
+			case 'ValidFunctionNameUnitTest.1.inc':
 				return array(
 					3   => 1,
 					9   => 1,
@@ -57,6 +61,10 @@ final class ValidFunctionNameUnitTest extends AbstractSniffUnitTest {
 					223 => function_exists( 'mb_strtolower' ) ? 1 : 0,
 					224 => 1,
 				);
+
+			default:
+				return array();
+		}
 	}
 
 	/**