test_xstring.cpp

经典的string 函数库学习资料

/**
 * @file test_xstring.cpp
 * @brief 字符串的包装，测试用例
 * @author 泥偶
 * @since  2003-08-29
 * @date   2003-09-12
 */

#include <sys/time.h>
#include <cstdio>
#include <iostream>
#include <stdexcept>
#include "xstring.hpp"

using namespace std;
using namespace x;

void test(const bool expression, const string& output = "")
{
    static int i = 0;
    ++i;
    printf("%5d", i);
    if (expression)
    {
        cout << " ................................... PASS" << endl;
        return;
    }
    cout << " ................................... FAIL" << endl;
    cout << "====== The actual result is following =======" << endl;
    cout << output << endl;
    cout << "====== The actual result is above ===========" << endl;
    exit(1);
}

int main()
{
    {
        cout << "xstring()" << endl;
        xstring str2;
        test(str2.empty());
    }
    {
        cout << "xstring(const string& str)" << endl;
        string str1 = "Hello World!";
        xstring str2(str1);
        test(str2 == str1);
    }
    {
        cout << "xstring(const string& str, size_type pos, size_type n = npos)" << endl;
        string str1 = "Hello World!";
        xstring str2(str1, 6, 5);
        test(str2 == "World", str2);
        xstring str3(str1, 6);
        test(str3 == "World!", str3);
    }
    {
        cout << "xstring(const char* s)" << endl;
        xstring str2("Hello World!");
        test(str2 == "Hello World!");
    }
    {
        cout << "xstring(const char* s, size_type n)" << endl;
        xstring str2("Hello World!", 5);
        test(str2 == "Hello");
    }
    {
        cout << "xstring(size_type n, char c)" << endl;
        xstring str2(5, 'c');
        test(str2 == "ccccc");
    }
    {
        cout << "xstring(iterator begin, iterator end)" << endl;
        string str1 = "Hello World!";
        xstring str2(str1.begin() + 6, str1.end() - 1);
        test(str2 == "World", str2);
    }
    {
        cout << "xstring(const xstring& str)" << endl;
        xstring str1 = "Hello World!";
        xstring str2(str1);
        test(str2 == str1);
    }
    {
        cout << "xstring(const xstring& str, size_type pos, size_type n = npos)" << endl;
        xstring str1 = "Hello World!";
        xstring str2(str1, 6, 5);
        test(str2 == "World", str2);
        xstring str3(str1, 6);
        test(str3 == "World!", str3);
    }
    {
        cout << "xstring(const char v)" << endl;
        char v = 'a';
        xstring str2(v);
        test(str2 == "a", str2);
    }
    {
        cout << "xstring(const signed char v)" << endl;
        signed char v = 'a';
        xstring str2(v);
        test(str2 == "a", str2);
    }
    {
        cout << "xstring(const unsigned char v)" << endl;
        unsigned char v = 'a';
        xstring str2(v);
        test(str2 == "a", str2);
    }
    {
        cout << "xstring(const int v)" << endl;
        xstring str2(static_cast<int>(0));
        test(str2 == "0");
        xstring str3(static_cast<int>(1));
        test(str3 == "1");
        xstring str4(static_cast<int>(-1));
        test(str4 == "-1");
        xstring str5(static_cast<int>(2147483647));
        test(str5 == "2147483647", str5);
        xstring str6(static_cast<int>(2147483648U));
        test(str6 == "-2147483648", str6);
    }
    {
        cout << "xstring(const short int v)" << endl;
        xstring str2(static_cast<short int>(0));
        test(str2 == "0");
        xstring str3(static_cast<short int>(1));
        test(str3 == "1");
        xstring str4(static_cast<short int>(-1));
        test(str4 == "-1");
        xstring str5(static_cast<short int>(32767));
        test(str5 == "32767", str5);
        xstring str6(static_cast<short int>(-32768));
        test(str6 == "-32768", str6);
    }
    {
        cout << "xstring(const long int v)" << endl;
        xstring str2(static_cast<long int>(0));
        test(str2 == "0");
        xstring str3(static_cast<long int>(1));
        test(str3 == "1");
        xstring str4(static_cast<long int>(-1));
        test(str4 == "-1");
        xstring str5(static_cast<long int>(2147483647L));
        test(str5 == "2147483647", str5);
        xstring str6(static_cast<long int>(2147483648LU));
        test(str6 == "-2147483648", str6);
    }
    {
        cout << "xstring(const long long int v)" << endl;
        xstring str2(static_cast<long long int>(0));
        test(str2 == "0");
        xstring str3(static_cast<long long int>(1));
        test(str3 == "1");
        xstring str4(static_cast<long long int>(-1));
        test(str4 == "-1");
        xstring str5(static_cast<long long int>(2147483647LL));
        test(str5 == "2147483647", str5);
        xstring str6(static_cast<long long int>(-2147483648LL));
        test(str6 == "-2147483648", str6);
        xstring str7(static_cast<long long int>(9223372036854775807LL));
        test(str7 == "9223372036854775807", str7);
        xstring str8(static_cast<long long int>(9223372036854775808LLU));
        test(str8 == "-9223372036854775808", str8);
    }
    {
        cout << "xstring(const unsigned int v)" << endl;
        xstring str2(static_cast<unsigned int>(0));
        test(str2 == "0", str2);
        xstring str3(static_cast<unsigned int>(1));
        test(str3 == "1", str3);
        xstring str4(static_cast<unsigned int>(-1));
        test(str4 == "4294967295", str4);
        xstring str5(static_cast<unsigned int>(4294967295U));
        test(str5 == "4294967295", str5);
    }
    {
        cout << "xstring(const short unsigned int v)" << endl;
        xstring str2(static_cast<short unsigned int>(0));
        test(str2 == "0", str2);
        xstring str3(static_cast<short unsigned int>(1));
        test(str3 == "1", str3);
        xstring str4(static_cast<short unsigned int>(-1));
        test(str4 == "65535", str4);
        xstring str5(static_cast<short unsigned int>(65535));
        test(str5 == "65535", str5);
    }
    {
        cout << "xstring(const long unsigned int v)" << endl;
        xstring str2(static_cast<long unsigned int>(0));
        test(str2 == "0", str2);
        xstring str3(static_cast<long unsigned int>(1));
        test(str3 == "1", str3);
        xstring str4(static_cast<long unsigned int>(-1));
        test(str4 == "4294967295", str4);
        xstring str5(static_cast<long unsigned int>(4294967295LU));
        test(str5 == "4294967295", str5);
    }
    {
        cout << "xstring(const long long unsigned int v)" << endl;
        xstring str2(static_cast<long long unsigned int>(0));
        test(str2 == "0", str2);
        xstring str3(static_cast<long long unsigned int>(1));
        test(str3 == "1", str3);
        xstring str4(static_cast<long long unsigned int>(-1));
        test(str4 == "18446744073709551615", str4);
        xstring str5(static_cast<long long unsigned int>(18446744073709551615LLU));
        test(str5 == "18446744073709551615", str5);
    }
    {
        cout << "xstring(const float v)" << endl;
        xstring str2(static_cast<float>(0));
        test(str2 == "0.000000", str2);
        xstring str3(static_cast<float>(1));
        test(str3 == "1.000000", str3);
        xstring str4(static_cast<float>(-1));
        test(str4 == "-1.000000", str4);
        xstring str5(static_cast<float>(1e38));
        cout << str5 << endl;
        xstring str6(static_cast<float>(3.4028e38));
        cout << str6 << endl;
        xstring str7(static_cast<float>(1e39));
        cout << str7 << endl;
        xstring str8(static_cast<float>(1e40));
        cout << str8 << endl;
    }
    {
        cout << "xstring(const double v)" << endl;
        xstring str2(static_cast<double>(0));
        test(str2 == "0.000000", str2);
        xstring str3(static_cast<double>(1));
        test(str3 == "1.000000", str3);
        xstring str4(static_cast<double>(-1));
        test(str4 == "-1.000000", str4);
        xstring str5(static_cast<double>(1e38));
        cout << str5 << endl;
        xstring str6(static_cast<double>(1e39));
        cout << str6 << endl;
        xstring str7(static_cast<double>(1e200));
        cout << str7 << endl;
        xstring str8(static_cast<double>(1e300));
        cout << str8 << endl;
        xstring str9(static_cast<double>(1e400));
        cout << str9 << endl;
    }
    {
        cout << "xstring(const long double v)" << endl;
        xstring str2(static_cast<long double>(0));
        test(str2 == "0.000000", str2);
        xstring str3(static_cast<long double>(1));
        test(str3 == "1.000000", str3);
        xstring str4(static_cast<long double>(-1));
        test(str4 == "-1.000000", str4);
        xstring str5(static_cast<long double>(1e38));
        cout << str5 << endl;
        xstring str6(static_cast<long double>(1e39));
        cout << str6 << endl;
        xstring str7(static_cast<long double>(1e200));
        cout << str7 << endl;
        xstring str8(static_cast<long double>(1e300));
        cout << str8 << endl;
        xstring str9(static_cast<long double>(1e400));
        cout << str9 << endl;
        xstring str10(static_cast<long double>(1e-38));
        cout << str10 << endl;
        xstring str11(static_cast<long double>(1e-39));
        cout << str11 << endl;
        xstring str12(static_cast<long double>(1e-100));
        cout << str12 << endl;
    }
    {
	cout << "xstring(int*)" << endl;
	int i = 0;
	xstring str(&i);
        test(str.size() > 2, str);
        test(str.substr(0, 2) == "0x", str);
    }
    {
	cout << "xstring(float*)" << endl;
	float f = 0;
	xstring str(&f);
        test(str.size() > 2, str);
        test(str.substr(0, 2) == "0x", str);
    }
    {
	cout << "xstring(void*)" << endl;
	int i = 0;
	xstring str(static_cast<void*>(&i));
        test(str.size() > 2, str);
        test(str.substr(0, 2) == "0x", str);
    }
    {
        cout << "xstring(NULL)" << endl;
        try
        {
            xstring str = NULL;
            test(str == "0", str);
        }
	catch (logic_error& e)
	{
            // attempt to create string with null pointer
            test(true);
	}
        catch (exception& e)
        {
	    // cout << typeid(e).name() << endl;
            test(false, e.what());
        }
        catch (...)
        {
            test(false, "Unknown exception!");
        }
    }
    {
        cout << "to<int>(void)" << endl;
        int i;
        i = xstring("0").to<int>();
        test(i == 0);
        i = xstring("1").to<int>();
        test(i == 1);
        i = xstring("-1").to<int>();
        test(i == -1);
    }
    {
        cout << "to<long int>(void)" << endl;
        int i;
        i = xstring("0").to<long int>();
        test(i == 0);
        i = xstring("1").to<long int>();
        test(i == 1);
        i = xstring("-1").to<long int>();
        test(i == -1);
    }
    {
        cout << "to<float>(void)" << endl;
        float v;
        v = xstring("0").to<float>();
        test(v == 0);
        v = xstring("1").to<float>();
        test(v == 1);
        v = xstring("-1").to<float>();
        test(v == -1);
    }
    {
        cout << "to<double>(void)" << endl;
        double v;
        v = xstring("0").to<double>();
        test(v == 0);
        v = xstring("1").to<double>();