How to write junit test for main method which accepts file as arugment

Asked Nov 26 '19 at 00:03

Active Nov 26 '19 at 00:10

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I have a file say input.txt while has commands:

load demo.png 
save test.png

my main method handles these lines perfectly and calls the appropriate controller. Now I have to write junit test cases for the main method. I have no idea how to approach this. I tried solution mentioned here- Testing main method by junit but it did not work.

asked Nov 26 '19 at 00:03

ajay singh

1

Try to implement the logic contained in the main function in another function and test this function. – Harry Coder Nov 26 '19 at 00:26
Calling the main method with proper parameters is trivial; the difficult here may be in how to check if the result is right or wrong. Would it be easy? – Little Santi Nov 26 '19 at 00:34
my main method generates image, so i can manually see whether image is generated correctly or not – ajay singh Nov 26 '19 at 00:37
@HarryCoder I will try that – ajay singh Nov 26 '19 at 00:37

How to write junit test for main method which accepts file as arugment

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