Criterion/samples/asserts.cc

#include <criterion/criterion.h>
#include <exception>
#include <new>
#include <array>

Test(asserts, base) {
    cr_assert(true);
    cr_expect(true);

    cr_assert(true, "Assertions may take failure messages");

    cr_assert(true, "Or even %d format string %s", 1, "with parameters");

    cr_expect(false, "assert is fatal, expect isn't");
    cr_assert(false, "This assert runs");
    cr_assert(false, "This does not");
}

Test(asserts, old_school) {
    cr_expect_fail("You can fail an assertion with a message from anywhere");
    cr_assert_fail(); // or without a message
}

Test(asserts, string) {
    cr_assert_str_empty("");
    cr_assert_str_not_empty("foo");

    cr_assert_str_eq("hello", "hello");
    cr_assert_str_neq("hello", "olleh");

    cr_assert_str_gt("hello", "hell");
    cr_assert_str_geq("hello", "hell");
    cr_assert_str_geq("hello", "hello");

    cr_assert_str_lt("hell", "hello");
    cr_assert_str_leq("hell", "hello");
    cr_assert_str_leq("hello", "hello");
}

Test(asserts, native) {
    cr_assert_eq(1, 1);
    cr_assert_neq(1, 2);

    cr_assert_lt(1, 2);
    cr_assert_leq(1, 2);
    cr_assert_leq(2, 2);

    cr_assert_gt(2, 1);
    cr_assert_geq(2, 1);
    cr_assert_geq(2, 2);
}

Test(asserts, float) {
    cr_assert_neq(0.1 * 0.1, 0.01);
    cr_assert_float_eq(0.1 * 0.1, 0.01, 0.001);
}

struct dummy_struct {
    char a;
    size_t b;

    bool operator==(const struct dummy_struct& rhs) const {
        return this->a == rhs.a && this->b == rhs.b;
    }

    bool operator<(const struct dummy_struct& rhs) const {
        return this->a < rhs.a;
    }
};

int eq_dummy(struct dummy_struct *a, struct dummy_struct *b) {
    return *a == *b ? 0 : (*a < *b ? -1 : 1);
}

Test(asserts, array) {
    // 1. (recommended): use std::array and cr_assert_eq
    std::array<dummy_struct, 2> cpparr1 = {{{4, 2}, {2, 4}}};
    std::array<dummy_struct, 2> cpparr2;
    memset(&cpparr2[0], 0xFF, 2 * sizeof(struct dummy_struct));
    cpparr2[0].a = 4;
    cpparr2[0].b = 2;
    cpparr2[1].a = 2;
    cpparr2[1].b = 4;

    cr_assert_eq(cpparr1, cpparr2);

    // 2. Compare arrays byte-to-byte
    int arr1[] = {1, 2, 3, 4};
    int arr2[] = {4, 3, 2, 1};

    cr_assert_arr_eq(arr1, arr1, 4 * sizeof (int));
    cr_assert_arr_neq(arr1, arr2, 4 * sizeof (int));

    // 3. Compare arrays with a comparison function
    struct dummy_struct s1[] = {{4, 2}, {2, 4}};
    struct dummy_struct s2[2];
    memset(s2, 0xFF, sizeof(s2));
    s2[0].a = 4;
    s2[0].b = 2;
    s2[1].a = 2;
    s2[1].b = 4;

    // cr_assert_arr_eq(&s1, &s2, 2 * sizeof (struct dummy_struct));
    // isn't guaranteed to work on structs.
    cr_assert_arr_eq_cmp(&s1, &s2, 2, eq_dummy);
}

Test(asserts, exception) {
    cr_assert_throw(throw std::exception(), std::exception);
    cr_assert_throw(throw std::exception(), std::bad_alloc);
}