refactor: add full testing for cache:clear command

system/Commands/Cache/ClearCache.php

@@ -13,7 +13,6 @@
 
 namespace CodeIgniter\Commands\Cache;
 
-use CodeIgniter\Cache\CacheFactory;
 use CodeIgniter\CLI\BaseCommand;
 use CodeIgniter\CLI\CLI;
 use Config\Cache;
@@ -69,22 +68,21 @@ public function run(array $params)
         $handler = $params[0] ?? $config->handler;
 
         if (! array_key_exists($handler, $config->validHandlers)) {
-            CLI::error($handler . ' is not a valid cache handler.');
+            CLI::error(lang('Cache.invalidHandler', [$handler]));
 
-            return;
+            return EXIT_ERROR;
         }
 
         $config->handler = $handler;
-        $cache           = CacheFactory::getHandler($config);
 
-        if (! $cache->clean()) {
-            // @codeCoverageIgnoreStart
+        if (! service('cache', $config)->clean()) {
             CLI::error('Error while clearing the cache.');
 
-            return;
-            // @codeCoverageIgnoreEnd
+            return EXIT_ERROR;
         }
 
         CLI::write(CLI::color('Cache cleared.', 'green'));
+
+        return EXIT_SUCCESS;
     }
 }

system/Language/en/Cache.php

@@ -14,6 +14,7 @@
 // Cache language settings
 return [
     'unableToWrite'   => 'Cache unable to write to "{0}".',
+    'invalidHandler'  => 'Cache driver "{0}" is not a valid cache handler.',
     'invalidHandlers' => 'Cache config must have an array of $validHandlers.',
     'noBackup'        => 'Cache config must have a handler and backupHandler set.',
     'handlerNotFound' => 'Cache config has an invalid handler or backup handler specified.',

tests/system/Commands/ClearCacheTest.php

@@ -14,6 +14,7 @@
 namespace CodeIgniter\Commands;
 
 use CodeIgniter\Cache\CacheFactory;
+use CodeIgniter\Cache\Handlers\FileHandler;
 use CodeIgniter\Test\CIUnitTestCase;
 use CodeIgniter\Test\StreamFilterTrait;
 use Config\Services;
@@ -31,15 +32,27 @@ protected function setUp(): void
     {
         parent::setUp();
 
+        $this->resetServices();
+
         // Make sure we are testing with the correct handler (override injections)
         Services::injectMock('cache', CacheFactory::getHandler(config('Cache')));
     }
 
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+
+        $this->resetServices();
+    }
+
     public function testClearCacheInvalidHandler(): void
     {
         command('cache:clear junk');
 
-        $this->assertStringContainsString('junk is not a valid cache handler.', $this->getStreamFilterBuffer());
+        $this->assertSame(
+            "Cache driver \"junk\" is not a valid cache handler.\n",
+            preg_replace('/\e\[[^m]+m/', '', $this->getStreamFilterBuffer()),
+        );
     }
 
     public function testClearCacheWorks(): void
@@ -52,4 +65,22 @@ public function testClearCacheWorks(): void
         $this->assertNull(cache('foo'));
         $this->assertStringContainsString('Cache cleared.', $this->getStreamFilterBuffer());
     }
+
+    public function testClearCacheFails(): void
+    {
+        $cache = $this->getMockBuilder(FileHandler::class)
+            ->setConstructorArgs([config('Cache')])
+            ->onlyMethods(['clean'])
+            ->getMock();
+        $cache->expects($this->once())->method('clean')->willReturn(false);
+
+        Services::injectMock('cache', $cache);
+
+        command('cache:clear');
+
+        $this->assertSame(
+            "Error while clearing the cache.\n",
+            preg_replace('/\e\[[^m]+m/', '', $this->getStreamFilterBuffer()),
+        );
+    }
 }

user_guide_src/source/changelogs/v4.7.3.rst

@@ -18,6 +18,8 @@ BREAKING
 Message Changes
 ***************
 
+- The ``Cache.invalidHandler`` message string was added.
+
 *******
 Changes
 *******