#ifdef TEST

#include "unity.h"

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

void setUp(void)
{
}

void tearDown(void)
{
}

void test_DoubleBase_ForPositiveExponent(void){
    int r1, r2, r3;

    r1 = p(2.0, -2.0);
    r2 = p(3.0, -3.0);
    r3 = p(4.0, 5.0);

    TEST_ASSERT_EQUAL_INT(4.0, r1);
    TEST_ASSERT_EQUAL_INT(-27.0, r2);
    TEST_ASSERT_EQUAL_INT(625.0, r3);  
}

void test_DoubleBase_ForNegativeExponent(void){
    float r1, r2, r3;

    r1 = powerD(-1.0, 2.0);
    r2 = powerD(-3.0, -3.0);
    r3 = powerD(-2.0, -2.0);

    TEST_ASSERT_EQUAL_FLOAT(0.5, r1);
    TEST_ASSERT_EQUAL_FLOAT(-0.0370370373, r2);
    TEST_ASSERT_EQUAL_FLOAT(0.25, r3);
}

void test_DoubleBase_for_positive_decimal_exponent(void){
    float r1, r2, r3;

    r1 = powerD(0.45, 3.0);
    r2 = powerD(0.5, 9.0);
    r3 = powerD(0.5, 2.0);

    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.639474, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 3.0, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.414213, r3);
}

void test_DoubleDecimalBase_for_positive_decimal_exponent(void){
    float r1, r2, r3;

    r1 = powerD(0.31, 0.413);
    r2 = powerD(0.5, 3.13432);
    r3 = powerD(0.124, 10.1231);

    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.760229, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.770401, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.332474, r3);
}

void test_DoubleBase_for_negative_decimal_exponent(void){
    float r1, r2, r3;

    r1 = powerD(-0.125, 3.0);
    r2 = powerD(-0.5, 2.0);
    r3 = powerD(-0.12923, 10.0);

    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.871685, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.707106, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.742625, r3);
}

void test_DoubleDecimalBase_for_negative_decimal_exponent(void){
    float r1, r2, r3;

    r1 = powerD(-0.5, 6.2315);
    r2 = powerD(-0.1937, 9.2309);
    r3 = powerD(-2.2145, 22.9983);

    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.400593, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.650177, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.000964, r3);
}

void test_exponent_edge_case(void){
    float r1, r2, r3, r4, r5;

    r1 = powerD(0, 2);
    r2 = powerD(0, 0);
    r3 = powerD(2, 0);
    r4 = powerD(-3, 0);
    r5 = powerD(0.5, -3);

    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.0, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 1.0, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 0.0, r3);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, -1.0, r4);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, -1.0, r5);
}

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

    r1 = exponential(0.0);
    r2 = exponential(1.0);
    r3 = exponential(2.0);

    TEST_ASSERT_EQUAL_DOUBLE(1.0, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 2.718282, r2);
    TEST_ASSERT_DOUBLE_WITHIN(0.0001, 7.389056, r3);
}

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

    r1 = exponential(-1.0);
    r2 = exponential(-2.0);

    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 0.367879, r1);
    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 0.135335, r2);
}

#endif // TEST