2023-2-WS_group_project_Linkes-Twix/test/test_logarithmus.c

#ifdef TEST

#include "unity.h"

#include "logarithmus.h"
#include "exponent.h"

void setUp(void)
{
}

void tearDown(void)
{
}

void test_ln_with_positive_number(void){
    double r1, r2, r3;

    r1 = logN(1.0, 0.000001);
    r2 = logN(10.0, 0.000001);
    r3 = logN(2.5, 0.000001);

    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 0, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 2.302585, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 0.916290, r3);
}

void test_ln_with_zero_and_negative_numbers(void){
    double r1, r2, r3;

    r1 = logN(0.0, 0.000001);
    r2 = logN(-1.0, 0.000001);
    r3 = logN(-2.5, 0.000001);

    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r1);
    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r2);
    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r3);
}

void test_logarithmic_function_with_edge_cases(void){
    double r1, r2, r3, r4;

    r1 = logX(0, 10);
    r2 = logX(-1.0, 9);
    r3 = logX(1, 18);
    r4 = logX(3, 0);

    printf("%lf\n", r1);
    printf("%lf\n", r2);
    printf("%lf\n", r3);
    printf("%lf\n", r4);

    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r1);
    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r2);
    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r3);
    TEST_ASSERT_EQUAL_DOUBLE(-1.0, r4);
}


#endif // TEST