ACP2E-3172: Import button missing

Author: Chhandak.Barua

app/code/Magento/ImportExport/Test/Unit/Controller/Adminhtml/Import/ValidateTest.php

@@ -327,6 +327,10 @@ public function testFileVerifiedWithImport()
             ->method('getErrorsCount')
             ->willReturn(2);
 
+        $errorAggregatorMock->expects($this->once())
+            ->method('getAllErrors')
+            ->willReturn($errorAggregatorMock);
+
         $this->resultFactoryMock->expects($this->any())
             ->method('create')
             ->with(ResultFactory::TYPE_LAYOUT)