fixed I18N handling of special param values and broken message tags

framework/yii/i18n/I18N.php

@@ -10,7 +10,6 @@ namespace yii\i18n;
 use Yii;
 use yii\base\Component;
 use yii\base\InvalidConfigException;
-use yii\base\InvalidParamException;
 use yii\log\Logger;
 
 /**
@@ -73,25 +72,27 @@ class I18N extends Component
 	public function translate($category, $message, $params, $language)
 	{
 		$message = $this->getMessageSource($category)->translate($category, $message, $language);
-		if (empty($params)) {
+
+		$params = (array)$params;
+		if ($params === array()) {
 			return $message;
 		}
 
-		$params = (array)$params;
 		if (class_exists('MessageFormatter', false) && preg_match('~{\s*[\d\w]+\s*,~u', $message)) {
 			$formatter = new MessageFormatter($language, $message);
 			if ($formatter === null) {
-				\Yii::$app->getLog()->log("$language message from category $category is invalid. Message is: $message.", Logger::LEVEL_WARNING, 'application');
-			} else {
+				Yii::warning("$language message from category $category is invalid. Message is: $message.");
+				return $message;
+			}
 			$result = $formatter->format($params);
 			if ($result === false) {
 				$errorMessage = $formatter->getErrorMessage();
-					\Yii::$app->getLog()->log("$language message from category $category failed with error: $errorMessage. Message is: $message.", Logger::LEVEL_WARNING, 'application');
+				Yii::warning("$language message from category $category failed with error: $errorMessage. Message is: $message.");
+				return $message;
 			} else {
 				return $result;
 			}
 		}
-		}
 
 		$p = array();
 		foreach($params as $name => $value) {

tests/unit/framework/i18n/GettextMessageSourceTest.php

@@ -12,6 +12,6 @@ class GettextMessageSourceTest extends TestCase
 {
 	public function testLoadMessages()
 	{
-		$this->markTestSkipped();
+		$this->markTestIncomplete();
 	}
 }

tests/unit/framework/i18n/I18NTest.php

@@ -7,6 +7,7 @@
 
 namespace yiiunit\framework\i18n;
 
+use yii\base\Model;
 use yii\i18n\I18N;
 use yii\i18n\MessageFormatter;
 use yii\i18n\PhpMessageSource;
@@ -62,4 +63,23 @@ class I18NTest extends TestCase
 		$this->assertEquals('Er heißt DA VINCI und ist 42 km/h schnell.', $this->i18n->translate('test', $msg, $params, 'de_DE'));
 	}
 
+	public function testSpecialParams()
+	{
+		$msg = 'His speed is about {0} km/h.';
+
+		$this->assertEquals('His speed is about 0 km/h.', $this->i18n->translate('test', $msg, 0, 'en_US'));
+		$this->assertEquals('His speed is about 42 km/h.', $this->i18n->translate('test', $msg, 42, 'en_US'));
+		$this->assertEquals('His speed is about {0} km/h.', $this->i18n->translate('test', $msg, null, 'en_US'));
+		$this->assertEquals('His speed is about {0} km/h.', $this->i18n->translate('test', $msg, array(), 'en_US'));
+
+		$msg = 'His name is {name} and he is {age} years old.';
+		$model = new ParamModel();
+		$this->assertEquals('His name is peer and he is 5 years old.', $this->i18n->translate('test', $msg, $model, 'en_US'));
+	}
+}
+
+class ParamModel extends Model
+{
+	public $name = 'peer';
+	public $age = 5;
 }