Check valid input or import for daily expense distribution

[jay412]

Task: 1) if wrong file type is uploaded using the file upload option, display the text "file type not supported" 2) if multiple expense fields are added using the add an expense button, check through all of the fields when display graph button is clicked 3) if any of the fields are empty, show an alert message to prompt that fields are missing

[jay412]

Task test: 1) Navigate to Expense Tracker page 2) Choose a non html file to import for daily expense distribution 3) An error message should be displayed to indicate the file type is wrong 4) Create several expense fields to input by clicking the Add an expense button 5) Leave some fields blank 6) Click on Display Graph button 7) An alert dialog should pop up indicating some fields are empty and should be filled out

[kotinos]

tested. passed