Added Console helper mock, updated DbSessionTest::testMigration() to hide migration process output

tests/framework/web/DbSessionTest.php

@@ -120,7 +120,10 @@ class DbSessionTest extends TestCase
                 ]
             ],
         ]);
-        
+
+        $consoleClass = Yii::$classMap['yii\helpers\Console'];
+        Yii::$classMap['yii\helpers\Console'] = Yii::getAlias('@yiiunit/framework/web/mocks/ConsoleMock.php');
+
         $history = $this->runMigrate('history');
         $this->assertEquals(['base'], $history);
 
@@ -129,5 +132,7 @@ class DbSessionTest extends TestCase
 
         $history = $this->runMigrate('down');
         $this->assertEquals(['base'], $history);
+
+        Yii::$classMap['yii\helpers\Console'] = $consoleClass;
     }
 }

tests/framework/web/mocks/ConsoleMock.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace yii\helpers;
+
+/**
+ * Mock of Console class
+ * @package yii\helpers
+ */
+class Console extends BaseConsole
+{
+    /**
+     * Prints a string to output buffer instead of STOUT
+     *
+     * @param string $string the string to print
+     * @return integer|boolean Number of bytes printed or false on error
+     */
+    public static function stdout($string)
+    {
+        echo $string;
+        return mb_strlen($string);
+    }
+
+    /**
+     * Prints a string to output buffer instead of STDERR
+     *
+     * @param string $string the string to print
+     * @return integer|boolean Number of bytes printed or false on error
+     */
+    public static function stderr($string)
+    {
+        echo $string;
+        return mb_strlen($string);
+    }
+}