-Test process

1. Test program gives the first text field(the number of choose field) a value of “2”

2. Test program generates a png image

-Pass condition

1. Test program verifies the second text field(result field) has a value of “world” 500ms after the first text field was given the value

AND

2. The test program verifies the output image equals the input test image in every pixel

-Test purpose

1. The “world” is the 2nd member of the list. The output logic is implemented by Adobe FormCalc script(described in Adobe FormCalc User Reference). This test aims to test Pdfium core’s correct interpretation of FormCalc script.