MAGETWO-37720: Cover Tango modules w. unit tests S2 (+0.7% from current 13.6%)

- Fixed some bugs

Author: Bohdan Korablov

app/code/Magento/Cms/Test/Unit/Block/Widget/Page/LinkTest.php

@@ -44,7 +44,7 @@ protected function setUp()
 
     protected function tearDown()
     {
-        $this->linkElement == null;
+        $this->linkElement = null;
     }
 
     public function testGetHrefEmpty()

app/code/Magento/Cms/Test/Unit/Helper/Wysiwyg/ImagesTest.php

@@ -157,7 +157,7 @@ protected function tearDown()
     }
 
     /**
-     * @param $path
+     * @param string $path
      * @return string
      */
     protected function getAbsolutePath($path)
@@ -369,7 +369,9 @@ public function testGetCurrentPathThrowException()
             ->willReturn(false);
         $this->directoryWriteMock->expects($this->any())
             ->method('create')
-            ->willThrowException(new \Magento\Framework\Exception\FileSystemException(__('')));
+            ->willThrowException(
+                new \Magento\Framework\Exception\FileSystemException(__('Could not create directory.'))
+            );
 
         $this->imagesHelper->getCurrentPath();
 
@@ -412,7 +414,7 @@ public function testGetCurrentUrl()
 
     /**
      * @param string $baseUrl
-     * @param string $filename
+     * @param string $fileName
      * @param bool $isUsingStaticUrls
      * @param string $expectedHtml
      * @dataProvider providerGetImageHtmlDeclarationRenderingAsTag