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

//
//  iterator.t.h
//  iterator
//
//  Created by Sam Jaffe on 2/7/17.
//
#pragma once

#include <cxxtest/TestSuite.h>

#include "join_iterator.hpp"

class join_iterator_TestSuite : public CxxTest::TestSuite {
public:
  using vec_t = std::vector<int>;
  using meta_vec_t = std::vector<vec_t>;
  using jn_iter = iterator::joining_iterator<meta_vec_t::iterator>;
  
//  vec_t v{1,2,3,4,5,6};
//  meta_vec_t mv{{1,2,3},{4,5,6}};
public:
  void test_points_to_beginning() {
    meta_vec_t mv{{1,2,3},{4,5,6}};
    TS_ASSERT_EQUALS(*jn_iter(make_end_aware_iterator(mv)), mv[0][0]);
  }
  
  void test_empty_constructor_is_end() {
    meta_vec_t mv{{1,2,3},{4,5,6}};
    jn_iter it( { mv.end(), mv.end() }, { mv.back().end(), mv.back().end() } );
    TS_ASSERT_EQUALS(it, jn_iter());
  }
  
  void test_steps_to_next_list() {
    meta_vec_t mv{{1,2,3},{4,5,6}};
    jn_iter it(make_end_aware_iterator(mv), { mv[0].end(), mv[0].end() });
    TS_ASSERT_EQUALS(*++it, mv[1][0]);
  }
  
  void test_cannot_go_past_end() {
    meta_vec_t mv{{1,2,3},{4,5,6}};
    jn_iter it( { mv.end(), mv.end() }, { mv.back().end(), mv.back().end() });
    jn_iter const cp = it;
    ++it;
    TS_ASSERT_EQUALS(it, cp);
  }
};