[TASK] Add tests that cover the fixed edge case

.github/workflows/tests.yml

@@ -1,10 +1,6 @@
 name: Tests
 
-on:
-  push:
-  pull_request:
-  schedule:
-    - cron:  '13 4 * * *'
+on: [ push, pull_request ]
 
 jobs:
   build:

.gitignore

@@ -1,4 +1,5 @@
+/.ddev
 /.php_cs.cache
 /.idea
-/vendor
 /composer.lock
+/vendor

src/ClassAliasLoader.php

@@ -120,7 +120,9 @@ public function loadClassWithAlias($className)
     {
         $originalClassName = $this->getOriginalClassName($className);
 
-        return $originalClassName ? $this->loadOriginalClassAndSetAliases($originalClassName) : $this->loadClass($className);
+        return $originalClassName
+            ? $this->loadOriginalClassAndSetAliases($originalClassName)
+            : $this->loadClass($className);
     }
 
     /**
@@ -149,19 +151,19 @@ protected function getOriginalClassName($aliasOrClassName)
     {
         // Is an original class which has an alias
         if (array_key_exists($aliasOrClassName, $this->aliasMap['classNameToAliasMapping'])) {
-            if ($this->aliasMap['classNameToAliasMapping'][$aliasOrClassName] === null) {
-                return null;
-            }
-            return $aliasOrClassName;
+            return $this->aliasMap['classNameToAliasMapping'][$aliasOrClassName] === array()
+                ? null
+                : $aliasOrClassName
+                ;
         }
-
-        // Is an alias (we're graceful regarding casing for alias definitions)
+        // Is an alias (we're graceful ignoring casing for alias definitions)
         $lowerCasedClassName = strtolower($aliasOrClassName);
         if (array_key_exists($lowerCasedClassName, $this->aliasMap['aliasToClassNameMapping'])) {
             return $this->aliasMap['aliasToClassNameMapping'][$lowerCasedClassName];
         }
         // No alias registered for this class name, return and remember that info
-        return $this->aliasMap['classNameToAliasMapping'][$aliasOrClassName] = null;
+        $this->aliasMap['classNameToAliasMapping'][$aliasOrClassName] = array();
+        return null;
     }
 
     /**

tests/Unit/ClassAliasLoaderTest.php

@@ -11,6 +11,7 @@
  */
 
 use Composer\Autoload\ClassLoader as ComposerClassLoader;
+use PHPUnit\Framework\MockObject\MockObject;
 use TYPO3\ClassAliasLoader\ClassAliasLoader;
 
 /**
@@ -24,7 +25,7 @@ class ClassAliasLoaderTest extends BaseTestCase
     protected $subject;
 
     /**
-     * @var ComposerClassLoader|\PHPUnit_Framework_MockObject_MockObject
+     * @var ComposerClassLoader|MockObject|PHPUnit_Framework_MockObject_MockObject
      */
     protected $composerClassLoaderMock;
 
@@ -97,6 +98,19 @@ public function loadsClassIfNoAliasIsFound()
         $this->assertTrue(class_exists($testClassName, false));
     }
 
+    /**
+     * @test
+     */
+    public function callingLoadClassMultipleTimesInEdgeCasesWillStillWork()
+    {
+        $this->composerClassLoaderMock
+            ->expects($this->exactly(2))
+            ->method('loadClass')
+            ->willReturnOnConsecutiveCalls(false, true);
+        $this->assertFalse($this->subject->loadClassWithAlias('TestClass'));
+        $this->assertTrue($this->subject->loadClassWithAlias('TestClass'));
+    }
+
     /**
      * @test
      */