Added unit tests.

Author: hostep

app/code/Magento/MediaStorage/Test/Unit/Service/ImageResizeTest.php

@@ -247,6 +247,9 @@ public function testResizeFromThemesMediaStorageDatabase()
         $this->databaseMock->expects($this->any())
             ->method('checkDbUsage')
             ->will($this->returnValue(true));
+        $this->databaseMock->expects($this->any())
+            ->method('fileExists')
+            ->will($this->returnValue(false));
 
         $this->productImageMock->expects($this->any())
             ->method('getCountUsedProductImages')
@@ -287,6 +290,9 @@ public function testResizeFromImageNameMediaStorageDatabase()
         $this->databaseMock->expects($this->any())
             ->method('checkDbUsage')
             ->will($this->returnValue(true));
+        $this->databaseMock->expects($this->any())
+            ->method('fileExists')
+            ->will($this->returnValue(false));
 
         $this->mediaDirectoryMock->expects($this->any())
             ->method('isFile')
@@ -316,4 +322,65 @@ public function testResizeFromImageNameMediaStorageDatabase()
 
         $this->service->resizeFromImageName($this->testfilename);
     }
+
+    public function testSkipResizingAlreadyResizedImageOnDisk()
+    {
+        $this->databaseMock->expects($this->any())
+            ->method('checkDbUsage')
+            ->will($this->returnValue(false));
+
+        $this->mediaDirectoryMock->expects($this->any())
+            ->method('isFile')
+            ->will($this->returnValue(true));
+
+        $this->themeCollectionMock->expects($this->any())
+            ->method('loadRegisteredThemes')
+            ->willReturn(
+                [ new DataObject(['id' => '0']) ]
+            );
+        $this->themeCustomizationConfigMock->expects($this->any())
+            ->method('getStoresByThemes')
+            ->willReturn(
+                ['0' => []]
+            );
+
+        $this->imageFactoryMock->expects($this->never())
+            ->method('create');
+
+        $this->service->resizeFromImageName($this->testfilename);
+    }
+
+    public function testSkipResizingAlreadyResizedImageInDatabase()
+    {
+        $this->databaseMock->expects($this->any())
+            ->method('checkDbUsage')
+            ->will($this->returnValue(true));
+        $this->databaseMock->expects($this->any())
+            ->method('fileExists')
+            ->will($this->returnValue(true));
+
+        $this->mediaDirectoryMock->expects($this->any())
+            ->method('isFile')
+            ->with($this->testfilepath)
+            ->willReturnOnConsecutiveCalls(
+                $this->returnValue(false),
+                $this->returnValue(true)
+            );
+
+        $this->themeCollectionMock->expects($this->any())
+            ->method('loadRegisteredThemes')
+            ->willReturn(
+                [ new DataObject(['id' => '0']) ]
+            );
+        $this->themeCustomizationConfigMock->expects($this->any())
+            ->method('getStoresByThemes')
+            ->willReturn(
+                ['0' => []]
+            );
+
+        $this->databaseMock->expects($this->never())
+            ->method('saveFile');
+
+        $this->service->resizeFromImageName($this->testfilename);
+    }
 }