974b7d0393
& "Added regression tests on theories" This reverts commits4cc826eae3and6110f43d87. Regression tests cannot be done on the two theory samples, as they both illustrate the consequences of testing against undefined behaviour. A full-fledged internal test should be set up in ./samples/tests for this purpose.
121 lines
2.8 KiB
C
121 lines
2.8 KiB
C
#ifdef _MSC_VER
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#pragma warning(disable : 4090)
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#endif
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#include <criterion/theories.h>
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#include <limits.h>
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# define INT_DATAPOINTS DataPoints(int, 0, 1, 2, -1, -2, INT_MAX, INT_MIN)
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// Let's test the multiplicative properties of 32-bit integers:
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int bad_mul(int a, int b) {
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return a * b;
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}
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int bad_div(int a, int b) {
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return a / b;
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}
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TheoryDataPoints(algebra, bad_divide_is_inverse_of_multiply) = {
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INT_DATAPOINTS,
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INT_DATAPOINTS,
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};
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Theory((int a, int b), algebra, bad_divide_is_inverse_of_multiply) {
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cr_assume(b != 0);
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cr_assert_eq(a, bad_div(bad_mul(a, b), b));
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}
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// The above implementation of mul & div fails the test because of overflows,
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// let's try again:
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long long good_mul(long long a, long long b) {
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return a * b;
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}
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long long good_div(long long a, long long b) {
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return a / b;
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}
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TheoryDataPoints(algebra, good_divide_is_inverse_of_multiply) = {
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INT_DATAPOINTS,
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INT_DATAPOINTS,
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};
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Theory((int a, int b), algebra, good_divide_is_inverse_of_multiply) {
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cr_assume(b != 0);
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cr_assert_eq(a, good_div(good_mul(a, b), b));
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}
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// For triangulation
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Test(algebra, multiplication_by_integer) {
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cr_assert_eq(10, good_mul(5, 2));
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}
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// Another property test
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TheoryDataPoints(algebra, zero_is_absorbing) = {
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INT_DATAPOINTS,
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INT_DATAPOINTS,
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};
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Theory((int a, int b), algebra, zero_is_absorbing) {
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cr_assume(a == 0 || b == 0);
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cr_assert_eq(0, good_mul(a, b));
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}
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// Testing for various parameters
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struct my_object {
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int foo;
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};
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TheoryDataPoints(theory, misc) = {
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DataPoints(char, 'a'),
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DataPoints(bool, true),
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DataPoints(short, 1),
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DataPoints(int, 1),
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DataPoints(long, 1),
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DataPoints(long long, 1),
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DataPoints(float, 3.14f),
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DataPoints(double, 3.14),
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DataPoints(char *, "test"),
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DataPoints(const char *, "other test"),
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DataPoints(struct my_object *, &(struct my_object) {42}),
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};
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Theory((char c, bool b, short s, int i, long l, long long ll, float f, double d, char *str, const char *cstr, struct my_object *obj), theory, misc) {
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cr_assert(b);
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cr_assert_eq(c, 'a');
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cr_assert_eq(s, 1);
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cr_assert_eq(i, 1);
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cr_assert_eq(l, 1);
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cr_assert_eq(ll, 1);
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cr_assert_eq(f, 3.14f);
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cr_assert_eq(d, 3.14);
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cr_assert_str_eq(str, "test");
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cr_assert_str_eq(cstr, "other test");
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cr_assert_eq(obj->foo, 42);
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// abort to see the formatted string of all parameters
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cr_assert_fail();
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}
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// Manually generate datapoints
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TheoryDataPoints(theory, gen) = {
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DataPoints(int, 0), // placeholder
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};
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static void generate_datapoints(void) {
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static int arr[] = {1, 2, 3, 4, 5};
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TheoryDataPoint(theory, gen)[0].len = 5;
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TheoryDataPoint(theory, gen)[0].arr = &arr;
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}
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Theory((int i), theory, gen, .init = generate_datapoints) {
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(void) i;
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cr_assert_fail(); // we fail to display the parameter
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}
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