You can check out the “previous date problem” program along with its tested test cases here.

First let’s identify the output domain for the previous date problem.

O₁ = Previous date
O₂ = Invalid date

Coming to Input domain,

I₁ = {1 <= date <=31 }
I₂ = {date<0 }
I₃ = {date>31}
I₄ = {1<= month <=12 }
I₅ = {month<1 }
I₆ = {month >31}
I₇ = {2000<= year <=2050}
I₈ = {year<2000 }
I₉ = {year>2050}

In this problem, we can clearly see 2 test cases for output and 9 test cases for input are made.