Attractor

Attractor is a single function unit test framework written in C11.

Installation

Copy attractor.c and attractor.h in your test folder.

Usage

Attractor provide a ATT_ASSERT macro that you can use to test your code. The macro outputs a number different from zero if the test passes:

ATT_ASSERT(the_value_to_test, the_expected_value, "description")

The ATT_ASSERT macro accept these types:

1. char
2. unsigned char
3. char*
4. short
5. unsigned short
6. int
7. unsigned int
8. long
9. unsigned long
10. long long
11. unsigned long long
12. float
13. double
14. long double
15. void*
16. _Bool

In case of unknown type the input is assumed to be int.

API

1. ATT_ASSERT(value, expected, description) you pass the value to test, the expected one and a description of the test.
2. unsigned int att_get_valid_tests(void) return the count of valid tests.
3. unsigned int att_get_total_tests(void) return the count of run tests.
4. void att_set_verbose(unsigned int verbose) set the verbose.

Examples

#include <attractor.h>

int var_to_test_1 = 1;
float var_to_test_2 = 2.0;

ATT_ASSERT(var_to_test_1, 1, "one == one")
ATT_ASSERT(var_to_test_2, 2.0, "2.0 == 2.0")
ATT_ASSERT(3ll, 3ll, "long long 3 == long long 3")

printf("\nTests valid/run: %d/%d\n", att_get_valid_tests(), att_get_total_tests());

The code does not output anything by default. But you can change this using:

// By defining:
#define ATT_VERBOSE 1 // 0, 1, 2

// Or by calling:
att_set_verbose(1); // 0, 1, 2

With verbose = 1 the code output . for a valid test and F for a failed test:

...
Tests valid/run: 3/3

With verbose = 2 the code output:

[%d] one == one:                                                              OK
[%f] 2.0 == 2.0:                                                              OK
[%lld] long long 3 == long long 3:                                            OK

Tests valid/run: 3/3

Examples with errors

If we change var_to_test_2 in 1.0 this is the output with verbose = 1:

.F
Expected 2.000000, got 3.000000

.
Tests valid/run: 2/3

And with verbose = 2:

[%d] one == one:                                                              OK
[%f] 2.0 == 2.0:                                                            FAIL
Expected 2.000000, got 3.000000

[%lld] long long 3 == long long 3:                                            OK

Tests valid/run: 2/3

Advance usage

Attractor treats strings as strings. So the content of the string is output to the terminal as it is in case of error. By defining #define ATT_STRING_AS_POINTERS 1, it will simply output the pointer address.

Check tests/test.c for an advanced example that uses multi-threaded tests.