1.*C# Console-unit

describe('class Console static writeLine', () => {
  it('should return the same string for single string argument', () => {
    const string = 'One single string';
    expect(Console.writeLine(string)).to.equal(string);
  });
  it('should return JSON string for single object argument', () => {
    const object = { name: 'Pesho', age: 32 };
    expect(Console.writeLine(object)).to.equal(JSON.stringify(object));
  });
  it('should throw error if no arguments were given', () => {
    expect(() => Console.writeLine()).to.throw(TypeError);
  });
  it('should throw error if first argument is not string', () => {
    expect(() => Console.writeLine(5, 1, 2)).to.throw(TypeError);
  });
  it('should throw error if placeholders are less than arguments', () => {
    const string = 'This {0} should {1} replaced.';
    expect(() => Console.writeLine(string, 'one', 'be', 'three')).to.throw(RangeError);
  });
  it('should throw error if place of placeholders is changed', () => {
    const string = 'This {0} should {0} replaced.';
    expect(() => Console.writeLine(string, 'one', 'be')).to.throw(RangeError);
  });
  it('should successfully replace placeholders with valid arguments', () => {
    const string = 'This {0} should {1} replaced.';
    expect(Console.writeLine(string, 'one', 'be')).to.equal('This one should be replaced.');
  });
  it('should throw error if invalid placeholder is given', () => {
    const string = 'This {0} should {1} replaced. This one {2} not work.';
    expect(() => Console.writeLine(string, 'one', 'be')).to.throw(RangeError);
  });
  it('should recognize the placeholder numbers well', () => {
    expect(() => Console.writeLine('Not {10}', 'valid')).to.throw(RangeError);
  });
});