How to check PDF text in automatic test?

Question

Software testing

I would like to learn the best practices from the world of testing.
If the input is
1) the expected content for verification
2) PDF as a byte array or a string with a
path
Master Text | Prefix | Suffix
m1 | p1 | s1
m2 | p2 | s2
.
.
.
mN
In the future, I would like to complicate the rules without losing simplicity. Please share your experience-practices on how you test PDF