README.md

logic

Parses logic expressions to produce a truth table and MC/DC cases.

Installation

gem install logic

Usage

By default, you get a truth table and a list of MC/DC pairs:

logic '(apple or bongo) and (cat or dog)'

Gives you:

a <= apple
b <= bongo
c <= cat
d <= dog

     a b c d | output
  1) 0 0 0 0 |   0
  2) 0 0 0 1 |   0
  3) 0 0 1 0 |   0
  4) 0 0 1 1 |   0
  5) 0 1 0 0 |   0
  6) 0 1 0 1 |   1
  7) 0 1 1 0 |   1
  8) 0 1 1 1 |   1
  9) 1 0 0 0 |   0
 10) 1 0 0 1 |   1
 11) 1 0 1 0 |   1
 12) 1 0 1 1 |   1
 13) 1 1 0 0 |   0
 14) 1 1 0 1 |   1
 15) 1 1 1 0 |   1
 16) 1 1 1 1 |   1

a => [[2, 10], [3, 11], [4, 12]]
b => [[2, 6], [3, 7], [4, 8]]
c => [[5, 7], [9, 11], [13, 15]]
d => [[5, 6], [9, 10], [13, 14]]

Options

-l, --[no-]truth_table           Show the truth table for the decision
-m, --[no-]mcdc_pairs            Show MC/DC test case pairs

Operators

The syntax understands: and, &&, or, ||, xor, ^, not, !, and parenthesis.