cpp2/test_equation.cpp at master · sergeevaa/cpp2 · GitHub

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#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <stdexcept>
#include <string>
#include <vector>

using namespace std;

template <class T>
ostream &operator << (ostream &os, const vector<T> &s)
{
    os << "{";
    bool first = true;
    for (const auto &x : s)
    {
        if (!first)
        {
            os << ", ";
        }
        first = false;
        os << x;
    }
    return os << "}";
}

template <class T>
ostream &operator << (ostream &os, const set<T> &s)
{
    os << "{";
    bool first = true;
    for (const auto &x : s)
    {
        if (!first)
        {
            os << ", ";
        }
        first = false;
        os << x;
    }
    return os << "}";
}

template <class K, class V>
ostream &operator << (ostream &os, const map<K, V> &m)
{
    os << "{";
    bool first = true;
    for (const auto &kv : m)
    {
        if (!first)
        {
            os << ", ";
        }
        first = false;
        os << kv.first << ": " << kv.second;
    }
    return os << "}";
}

template<class T, class U>
void AssertEqual(const T &t, const U &u, const string &hint = {})
{
    if (t != u)
    {
        ostringstream os;
        os << "Assertion failed: " << t << " != " << u;
        if (!hint.empty())
        {
            os << " hint: " << hint;
        }
        throw runtime_error(os.str());
    }
}

void Assert(bool b, const string &hint)
{
    AssertEqual(b, true, hint);
}

class TestRunner
{
public:
    template <class TestFunc>
    void RunTest(TestFunc func, const string &test_name)
    {
        try
        {
            func();
            cerr << test_name << " OK" << endl;
        }
        catch (exception &e)
        {
            ++fail_count;
            cerr << test_name << " fail: " << e.what() << endl;
        }
        catch (...)
        {
            ++fail_count;
            cerr << "Unknown exception caught" << endl;
        }
    }

    ~TestRunner()
    {
        if (fail_count > 0)
        {
            cerr << fail_count << " unit tests failed. Terminate" << endl;
            exit(1);
        }
    }

private:
    int fail_count = 0;
};

int GetDistinctRealRootCount(double a, double b, double c)
{
    // Вы можете вставлять сюда различные реализации функции,
    // чтобы проверить, что ваши тесты пропускают корректный код
    // и ловят некорректный
    if (b == 0 && c != 0)
    {
        return 0;
    }

    if (b != 0)
    {
        return 1;
    }
}

void TestLinearZeroRoots()
{
    AssertEqual(GetDistinctRealRootCount(0, 0, 3), 0);
}

void TestLinearOneRoot()
{
    AssertEqual(GetDistinctRealRootCount(0, 1, 3), 1);
    AssertEqual(GetDistinctRealRootCount(0, 1, 0), 1);
}

void TestQuadZeroRoots()
{
    AssertEqual(GetDistinctRealRootCount(1, 0, 1), 0);
    AssertEqual(GetDistinctRealRootCount(1, 2, 3), 0);
    AssertEqual(GetDistinctRealRootCount(-1, -2, -3), 0);
}

void TestQuadOneRoot()
{
    AssertEqual(GetDistinctRealRootCount(1, 0, 0), 1);
    AssertEqual(GetDistinctRealRootCount(1, 2, 1), 1);
    AssertEqual(GetDistinctRealRootCount(-1, -2, -1), 1);
}

void TestQuadTwoRoots()
{
    AssertEqual(GetDistinctRealRootCount(1, 0, -1), 2);
    AssertEqual(GetDistinctRealRootCount(1, 2, 0), 2);
    AssertEqual(GetDistinctRealRootCount(-1, -2, 3), 2);
}

int main()
{
    TestRunner runner;
    // добавьте сюда свои тесты
    runner.RunTest(TestLinearZeroRoots, "TestLinearZeroRoots");
    runner.RunTest(TestLinearOneRoot, "TestLinearOneRoot");
    runner.RunTest(TestQuadZeroRoots, "TestQuadZeroRoots");
    runner.RunTest(TestQuadOneRoot, "TestQuadOneRoot");
    runner.RunTest(TestQuadTwoRoots, "TestQuadTwoRoots");

    return 0;
}