Module OUnitDiffSource

Unit tests for collection of elements

This module allows to define a more precise way to display differences between collection of elements. When collection differ, the tester is interested by what are the missing/extra elements. This module provides a diff operation to spot the difference quickly between two sets of elements.

Example:

open OUnit;;

module EInt =
struct
  type t = int
  let compare = ( - )
  let pp_printer = Format.pp_print_int
  let pp_print_sep = OUnitDiff.pp_comma_separator
end

module ListInt = OUnitDiff.ListSimpleMake(EInt);;

let test_diff () =
  ListInt.assert_equal
    [1; 2; 3; 4; 5]
    [1; 2; 5; 4]
;;

let _ =
  run_test_tt_main ("test_diff" >:: test_diff)
;;

when run this test outputs:

OUnit: expected: 1, 2, 3, 4, 5 but got: 1, 2, 5, 4
differences: element number 2 differ (3 <> 5)

• since 1.1.0

• author Sylvain Le Gall

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Implementations