test_List.cpp

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/**
 * @file test_List.cpp
 * Tests the List container.
 */

#include <unit_test.h>
#include <containers/List.hpp>
#include <float.h>
#include <math.h>

class testContainer : public ListNode<testContainer *>
{
public:
    int i{0};
};

class ListTest : public UnitTest
{
public:
    virtual bool run_tests();

    bool test_add();
    bool test_remove();
    bool test_range_based_for();

};

bool ListTest::run_tests()
{
    ut_run_test(test_add);
    ut_run_test(test_remove);
    ut_run_test(test_range_based_for);

    return (_tests_failed == 0);
}

bool ListTest::test_add()
{
    List<testContainer *> list1;

    // size should be 0 initially
    ut_compare("size initially 0", list1.size(), 0);
    ut_assert_true(list1.empty());

    // insert 100
    for (int i = 0; i < 100; i++) {
        testContainer *t = new testContainer();
        t->i = i;
        list1.add(t);

        ut_compare("size increasing with i", list1.size(), i + 1);
        ut_assert_true(!list1.empty());
    }

    // verify full size (100)
    ut_assert_true(list1.size() == 100);

    int i = 0;

    for (auto t : list1) {
        // verify all elements were inserted in order
        ut_compare("stored i", i, t->i);
        i++;
    }

    // delete all elements
    list1.clear();

    // verify list has been cleared
    ut_assert_true(list1.empty());
    ut_compare("size 0", list1.size(), 0);

    return true;
}

bool ListTest::test_remove()
{
    List<testContainer *> list1;

    // size should be 0 initially
    ut_compare("size initially 0", list1.size(), 0);
    ut_assert_true(list1.empty());

    // insert 100
    for (int i = 0; i < 100; i++) {
        testContainer *t = new testContainer();
        t->i = i;
        list1.add(t);

        ut_compare("size increasing with i", list1.size(), i + 1);
        ut_assert_true(!list1.empty());
    }

    // verify full size (100)
    ut_assert_true(list1.size() == 100);

    // test removing elements
    for (int remove_i = 0; remove_i < 100; remove_i++) {

        // find node with i == remove_i
        testContainer *removed = nullptr;

        for (auto t : list1) {
            if (t->i == remove_i) {
                ut_assert_true(list1.remove(t));
                removed = t;
            }
        }

        delete removed;

        // iterate list again to verify removal
        for (auto t : list1) {
            ut_assert_true(t->i != remove_i);
        }

        ut_assert_true(list1.size() == 100 - remove_i - 1);
    }

    // list should now be empty
    ut_assert_true(list1.empty());
    ut_compare("size 0", list1.size(), 0);

    // delete all elements (should be safe on empty list)
    list1.clear();

    // verify list has been cleared
    ut_assert_true(list1.empty());
    ut_compare("size 0", list1.size(), 0);

    return true;
}

bool ListTest::test_range_based_for()
{
    List<testContainer *> list1;

    // size should be 0 initially
    ut_compare("size initially 0", list1.size(), 0);
    ut_assert_true(list1.empty());

    // insert 100 elements in order
    for (int i = 99; i >= 0; i--) {
        testContainer *t = new testContainer();
        t->i = i;

        list1.add(t);

        ut_assert_true(!list1.empty());
    }

    // first element should be 99 (first added)
    ut_compare("first 0", list1.getHead()->i, 99);

    // verify all elements were inserted in order
    int i = 99;
    auto t1 = list1.getHead();

    while (t1 != nullptr) {
        ut_compare("check count", i, t1->i);
        t1 = t1->getSibling();
        i--;
    }

    // verify full size (100)
    ut_compare("size check", list1.size(), 100);

    i = 99;

    for (auto t2 : list1) {
        ut_compare("range based for i", i, t2->i);
        i--;
    }

    // verify full size (100)
    ut_compare("size check", list1.size(), 100);

    // delete all elements
    list1.clear();

    // verify list has been cleared
    ut_assert_true(list1.empty());
    ut_compare("size check", list1.size(), 0);

    return true;
}

ut_declare_test_c(test_List, ListTest)