#include "gtest/gtest.h"
#include "pistring.h"
#include "pistringlist.h"
#include "math.h"

using namespace std;

template <typename T>
bool is_equal(T x, T y) {
    return std::fabs(x - y) < std::numeric_limits<T>::epsilon();
}

TEST(PIString_Tests, constructor_empty){
    PIString str1;
    ASSERT_TRUE(str1.isEmpty());
}


TEST(PIString_Tests, operator_concatenation_pichar){
    PIString str1 = "AB C";
    const PIChar str2 = " ";
    str1 += str2;
    PIString res = "AB C ";
    ASSERT_EQ(str1, res);
}

TEST(PIString_Tests, operator_concatenation_pichar_zero1){
    PIString str1 = "";
    const PIChar str2 = "D";
    str1 += str2;
    ASSERT_EQ(str1, "D");
}

TEST(PIString_Tests, operator_concatenation_char){
    PIString str1 = "AB C";
    const char *str2 = "D D ";
    str1 += str2;
    ASSERT_EQ(str1, "AB CD D ");
}

TEST(PIString_Tests, operator_concatenation_char_zero1){
    PIString str1 = "";
    const char *str2 = "D D ";
    str1 += str2;
    ASSERT_EQ(str1, "D D ");
}

TEST(PIString_Tests, operator_concatenation_wchar){
    PIString str1= "AB C";
    wchar_t str2[] = L"C";
    str1 += str2;
    ASSERT_EQ(str1, "AB CC");
}

TEST(PIString_Tests, operator_concatenation_wchar_zero1){
    PIString str1 = "";
    wchar_t str2[] = L"C";
    str1 += str2;
    ASSERT_EQ(str1, "C");
}

TEST(PIString_Tests, operator_concatenation_pistring){
    PIString str1 = "AB C";
    PIString str2 = " CD  ";
    str1 += str2;
    ASSERT_EQ(str1, "AB C CD  ");
}

TEST(PIString_Tests, operator_concatenation_pistring_zero1){
    PIString str1 = "";
    PIString str2 = "D DD";
    str1 += str2;
    ASSERT_EQ(str1, "D DD");
}

TEST(PIString_Tests, operator_concatenation_pistring_zero2){
    PIString str1 = "AB C";
    PIString str2 = "";
    str1 += str2;
    ASSERT_EQ(str1, "AB C");
}