cpp-useful-iterators/test/end_aware_iterator.t.h

//
//  end_aware_iterator.t.h
//  iterator
//
//  Created by Sam Jaffe on 2/7/17.
//

#pragma once

#include <cxxtest/TestSuite.h>

#include <vector>

#include "end_aware_iterator.hpp"

class end_aware_TestSuite : public CxxTest::TestSuite {
public:
  using vec_t = std::vector<int>;
  using ea_iter = iterator::end_aware_iterator<vec_t::iterator>;
public:
  void test_iterator_points_to_same() {
    vec_t v{1, 2, 3, 4, 5};
    TS_ASSERT_EQUALS(*v.begin(), *ea_iter(v.begin(), v.end()));
  }

  void test_iterator_edits_same() {
    vec_t v{1, 2, 3, 4, 5};
    *ea_iter(v.begin(), v.end()) = -1;
    TS_ASSERT_EQUALS(v[0], -1);
  }
  
  void test_not_done_until_end() {
    vec_t v{1, 2, 3, 4, 5};
    ea_iter it{v.end()-1, v.end()};
    TS_ASSERT(!it.done());
    ++it;
    TS_ASSERT_EQUALS(it, ea_iter(v.end(),v.end()));
    TS_ASSERT(it.done());
  }

  void test_cannot_go_past_end() {
    vec_t v{1, 2, 3, 4, 5};
    ea_iter it{v.end(), v.end()};
    ea_iter const cp = it;
    ++it;
    TS_ASSERT_EQUALS(it, cp);
    TS_ASSERT(it.done());
  }
  
};