Shotgun Gorilla Bomber — ft_printf

日本語

"Testing shows the presence, not the absence of bugs." — Edsger W. Dijkstra

Whatever. 146,000 rounds should be enough to figure it out.

Other testers try to be smart. Gorilla is not smart. But gorilla tests everything.

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Does your ft_printf actually work? This tester brute-forces every flag combination × width × precision × edge case against the real printf. No thinking. Just fire. That's gorilla.

What it tests

• Specifiers: %d %i %c %s %p %x %X %u %%
• Flags: all 31 combinations of # 0 + - + no flags
• Width: (none), 0, 1, 3, 6, 7, 10, 15
• Precision: (none), ., .0, .1, .3, .10, .15
• Nasty values: INT_MAX, INT_MIN, LONG_MAX, LONG_MIN, ULONG_MAX, NULL, NUL char, empty string, width 50/100, text around specifiers

Everything is compared against printf. Mismatch = FAIL. That's it.

Usage

# Clone inside your ft_printf repository
cd path/to/ft_printf
make
git clone https://github.com/FindingMiGo/shotgun-gorilla-bomber-ft-printf.git
cd shotgun-gorilla-bomber-ft-printf
sh ft_printf_tester.sh

Directory layout:

ft_printf/           # your ft_printf
├── ft_printf.h
├── libftprintf.a
├── libft/           # if your ft_printf.h includes libft headers
└── shotgun-gorilla-bomber-ft-printf/
    ├── ft_printf_tester.c
    └── ft_printf_tester.sh

Output

All passed:

  Shotgun Gorilla Bomber — exhaustive ft_printf tester

  Results: ALL 146960 PASSED

Something broke:

  Shotgun Gorilla Bomber — exhaustive ft_printf tester

FAIL %#0x [15]
  out: "0xf" → "0XF"
  ret: 3 → 3

  Results: 146957 passed, 3 failed / 146960 total

Only failures are printed. Gorilla is kind.