text: const assert = require('assert');
  Object.freeze(assert);
  const check = require('./src/index.js'); 
  
  const config1 = [['(', ')']];
  const config2 = [['(', ')'], ['[', ']']];
  const config3 = [['(', ')'], ['[', ']'], ['{', '}']];
  const config4 = [['|', '|']];
  const config5 = [['(', ')'], ['|', '|']];
  const config6 = [['1', '2'], ['3', '4'], ['5', '6'], ['7', '7'], ['8', '8']];
  const config7 = [['(', ')'], ['[', ']'], ['{', '}'], ['|', '|']];
  
  it('should check if brackets sequence is correct 1', () => {
    assert.equal(check('()', config1), true);
  });
  
  it('should check if brackets sequence is correct 2', () => {
    assert.equal(check('((()))()', config1), true);
  });
  
  it('should check if brackets sequence is not correct 3', () => {
    assert.equal(check('())(', config1), false);
  });
  
  it('should check if brackets sequence is correct 4', () => {
    assert.equal(check('([{}])', config3), true);
  });
  
  it('should check if brackets sequence is not correct 5', () => {
    assert.equal(check('[(])', config2), false);
  });
  
  it('should check if brackets sequence is correct 6', () => {
    assert.equal(check('[]()', config2), true);
  });
  
  it('should check if brackets sequence is correct 7', () => {
    assert.equal(check('[]()(', config2), false);
  });
  
  it('should check if brackets sequence is correct 8', () => {
    assert.equal(check('||', config4), true);
  });
  
  it('should check if brackets sequence is correct 9', () => {
    assert.equal(check('|()|', config5), true);
  });
  
  it('should check if brackets sequence is not correct 10', () => {
    assert.equal(check('|(|)', config5), false);
  });
  
  it('should check if brackets sequence is correct 11', () => {
    assert.equal(check('|()|(||)||', config5), true);
  });
  
  it('should check if brackets sequence is correct 12', () => {
    assert.equal(check('111115611111111222288888822225577877778775555666677777777776622222', config6), true);
  });
  
  it('should check if brackets sequence is correct 13', () => {
    assert.equal(check('5555512575557777777555566667888888667661133833448441111222233333444442266666', config6), false);
  });
  
  it('should check if brackets sequence is correct 14', () => {
    assert.equal(check('8888877878887777777888888887777777887887788788887887777777788888888887788888', config6), false);
  });
  
  it('should check if brackets sequence is correct 15', () => {
    assert.equal(check('111115611111111156111111112222888888222255778777787755556666777777777766222221111222288888822225577877778775555666677777777776622222', config6), true);
  });
  
  it('should check if brackets sequence is not correct 16', () => {
    assert.equal(check('[]][[]', config3), false);
  });
  
  it('should check if brackets sequence is not correct 17', () => {
    assert.equal(check('[]][[]', config2), false);
  });
  
  it('should check if brackets sequence is not correct 18', () => {
    assert.equal(check('([[[[(({{{}}}(([](((((((())))||||||))))[[{{|{{}}|}}[[[[]]]]{{{{{}}}}}]]))))]]]]))()', config7), false);
  });
  
  it('should check if brackets sequence is correct 19', () => {
    assert.equal(check('([[[[(({{{}}}(([](((((((())))||||||))))[[{{|{{}}|}}[[[[]]]]{{{{{}}}}}]]))))]]]])(())', config7), true);
  });
  
  it('should check if brackets sequence is correct 20', () => {
    assert.equal(check('([[[[(({{{}}}(([](((((((())))||||||))))[[{{|{{}}|}}[[[[]]]]{{{{{}}}}}]]))))]]]])((([[[[(({{{}}}(([](((((((())))||||||))))[[{{|{{}}|}}[[[[]]]]{{{{{}}}}}]]))))]]]])))', config7), true);
  });
  