CircularContainerIterator/my_circular_container_iterator_test.cpp at master · yalinhuang/CircularContainerIterator · GitHub

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#include <vector>
using std::vector;
#include <iostream>
using std::cout;
using std::endl;

#include <assert.h>

#include "my_circular_container_iterator.h"

void unit_test_size_1(void)
{
	vector<int> v({1});
	MyCircularContainerIterator<vector<int>, vector<int>::const_iterator> it(v, v.cbegin());

	// ++it
	for (auto i = 0; i < 5; ++i) {
		assert(*(++it) == 1);
	}

	// it++
	for (auto i = 0; i < 5; ++i) {
		assert(*(it++) == 1);
	}

	// --it
	for (auto i = 0; i < 5; ++i) {
		assert(*(--it) == 1);
	}

	// it--
	for (auto i = 0; i < 5; ++i) {
		assert(*(it--) == 1);
	}

	// it+
	for (auto i = 0; i < 5; ++i) {
		assert(*(it + i) == 1);
	}

	// it-
	for (auto i = 0; i < 5; ++i) {
		assert(*(it - i) == 1);
	}

	// it+=
	for (auto i = 0; i < 5; ++i) {
		assert(*(it += i) == 1);
	}

	// it-=
	for (auto i = 0; i < 5; ++i) {
		assert(*(it -= i) == 1);
	}
}

void unit_test_size_5(void)
{
	vector<int> v({1, 2, 3, 4, 5});
	MyCircularContainerIterator<vector<int>, vector<int>::const_iterator> vIt(v, v.cbegin());
	auto it(vIt);
	vector<int> output;

	// ++it
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(++it));
	}
	assert(output == vector<int>({2, 3, 4, 5, 1, 2, 3}));
	it = vIt;
	output.clear();

	// it++
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it++));
	}
	assert(output == vector<int>({1, 2, 3, 4, 5, 1, 2}));
	it = vIt;
	output.clear();

	// --it
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(--it));
	}
	assert(output == vector<int>({5, 4, 3, 2, 1, 5, 4}));
	it = vIt;
	output.clear();

	// it--
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it--));
	}
	assert(output == vector<int>({1, 5, 4, 3, 2, 1, 5}));
	it = vIt;
	output.clear();

	// it+
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it + i));
	}
	assert(output == vector<int>({1, 2, 3, 4, 5, 1, 2}));
	output.clear();

	// it-
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it - i));
	}
	assert(output == vector<int>({1, 5, 4, 3, 2, 1, 5}));
	output.clear();

	// it+=
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it += i));
	}
	assert(output == vector<int>({1, 2, 4, 2, 1, 1, 2}));
	it = vIt;
	output.clear();

	// it-=
	for (auto i = 0; i < 7; ++i) {
		output.push_back(*(it -= i));
	}
	assert(output == vector<int>({1, 5, 3, 5, 1, 1, 5}));
	it = vIt;
	output.clear();
}

void unit_test_iterator_to_index(void)
{
	vector<int> v({1, 2, 3, 4, 5});
	MyCircularContainerIterator<vector<int>, vector<int>::const_iterator> it(v, v.cbegin());

	for (auto steps = v.size(); steps; --steps, ++it) {
		assert(*it == v[it.iterator2index()]);
	}
}

int main(int argc, char **argv)
{
	unit_test_size_1();
	unit_test_size_5();
	unit_test_iterator_to_index();

	return 0;
}