Handle namespaced classes that do not extend TestCase

Author: sebastianbergmann

src/Runner/TestSuiteLoader.php

@@ -12,7 +12,6 @@
 use function array_diff;
 use function array_values;
 use function basename;
-use function class_exists;
 use function get_declared_classes;
 use function realpath;
 use function str_ends_with;
@@ -77,11 +76,13 @@ public function load(string $suiteClassFile): ReflectionClass
             throw $e;
         }
 
-        if (!class_exists($suiteClassName)) {
-            throw new ClassCannotBeFoundException($suiteClassName, $suiteClassFile);
+        foreach ($loadedClasses as $className) {
+            if (str_ends_with(strtolower($className), strtolower($suiteClassName))) {
+                throw new ClassDoesNotExtendTestCaseException($className, $suiteClassFile);
+            }
         }
 
-        throw new ClassDoesNotExtendTestCaseException($suiteClassName, $suiteClassFile);
+        throw new ClassCannotBeFoundException($suiteClassName, $suiteClassFile);
     }
 
     private function classNameFromFileName(string $suiteClassFile): string

tests/end-to-end/regression/5364.phpt

@@ -19,7 +19,7 @@ Time: %s, Memory: %s
 
 There was 1 PHPUnit test runner warning:
 
-1) Class BarTest cannot be found in %sBarTest.php
+1) Class PHPUnit\TestFixture\Issue5364\BarTest declared in %sBarTest.php does not extend PHPUnit\Framework\TestCase
 
 WARNINGS!
 Tests: 1, Assertions: 1, Warnings: 1.