Testing And Benchmarking in COBOL

Here’s the translation of the Go testing and benchmarking example to COBOL, with explanations adapted for COBOL:

       IDENTIFICATION DIVISION.
       PROGRAM-ID. INTMIN-TEST.

       ENVIRONMENT DIVISION.
       INPUT-OUTPUT SECTION.
       FILE-CONTROL.
           SELECT PRINT-FILE ASSIGN TO PRINTER.

       DATA DIVISION.
       FILE SECTION.
       FD PRINT-FILE.
       01 PRINT-LINE PIC X(80).

       WORKING-STORAGE SECTION.
       01 WS-A PIC S9(4) COMP.
       01 WS-B PIC S9(4) COMP.
       01 WS-RESULT PIC S9(4) COMP.
       01 WS-EXPECTED PIC S9(4) COMP.
       01 WS-TEST-CASE PIC 9(2).
       01 WS-TEST-CASES.
          05 FILLER PIC X(12) VALUE "000100000000".
          05 FILLER PIC X(12) VALUE "010000000000".
          05 FILLER PIC X(12) VALUE "0202-2-20000".
          05 FILLER PIC X(12) VALUE "00-1-1000000".
          05 FILLER PIC X(12) VALUE "-100-1000000".
       01 WS-TEST-TABLE REDEFINES WS-TEST-CASES.
          05 WS-TEST OCCURS 5 TIMES.
             10 WS-TEST-A PIC S9(4) COMP.
             10 WS-TEST-B PIC S9(4) COMP.
             10 WS-TEST-EXPECTED PIC S9(4) COMP.

       PROCEDURE DIVISION.
       MAIN-PROCEDURE.
           PERFORM TEST-INTMIN-BASIC
           PERFORM TEST-INTMIN-TABLE-DRIVEN
           STOP RUN.

       INTMIN.
           IF WS-A < WS-B
               MOVE WS-A TO WS-RESULT
           ELSE
               MOVE WS-B TO WS-RESULT.

       TEST-INTMIN-BASIC.
           MOVE 2 TO WS-A
           MOVE -2 TO WS-B
           PERFORM INTMIN
           IF WS-RESULT NOT = -2
               DISPLAY "Test failed: IntMin(2, -2) = " WS-RESULT
                       " expected -2"
           ELSE
               DISPLAY "Test passed: IntMin(2, -2) = -2".

       TEST-INTMIN-TABLE-DRIVEN.
           PERFORM VARYING WS-TEST-CASE FROM 1 BY 1 
                   UNTIL WS-TEST-CASE > 5
               MOVE WS-TEST-A(WS-TEST-CASE) TO WS-A
               MOVE WS-TEST-B(WS-TEST-CASE) TO WS-B
               MOVE WS-TEST-EXPECTED(WS-TEST-CASE) TO WS-EXPECTED
               PERFORM INTMIN
               IF WS-RESULT NOT = WS-EXPECTED
                   DISPLAY "Test case " WS-TEST-CASE " failed: "
                           "IntMin(" WS-A "," WS-B ") = " WS-RESULT
                           " expected " WS-EXPECTED
               ELSE
                   DISPLAY "Test case " WS-TEST-CASE " passed".

In COBOL, we don’t have built-in testing frameworks like in Go. Instead, we’ve implemented a simple testing structure within the program itself. Here’s an explanation of the key parts:

We define the INTMIN procedure, which is the function we’re testing. It takes two parameters (WS-A and WS-B) and returns the result in WS-RESULT.
TEST-INTMIN-BASIC is a simple test case, similar to TestIntMinBasic in the Go version. It tests a single scenario and reports whether it passed or failed.
TEST-INTMIN-TABLE-DRIVEN is our table-driven test, similar to TestIntMinTableDriven in Go. We define a table of test cases in the WS-TEST-CASES and WS-TEST-TABLE structures, then loop through them, running each test case and reporting the results.
We don’t have an exact equivalent to Go’s benchmarking in COBOL. Performance testing in COBOL typically involves measuring the execution time of the entire program or specific sections using the system clock.

To run these tests:

Compile the COBOL program:
```
$ cobc -x INTMIN-TEST.cob
```
Run the compiled program:
```
$ ./INTMIN-TEST
```

This will execute all the tests and display the results.

Note that COBOL doesn’t have built-in unit testing or benchmarking tools like Go does. In a real-world scenario, you might use a COBOL unit testing framework or create more sophisticated custom testing routines. The approach shown here is a simplified representation to demonstrate the concept of testing in COBOL.

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Testing And Benchmarking in COBOL