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thekeele's solution

to Gigasecond in the Ruby Track

Published at Aug 18 2019 · 0 comments
Test suite

Calculate the moment when someone has lived for 10^9 seconds.

A gigasecond is 10^9 (1,000,000,000) seconds.

For installation and learning resources, refer to the Ruby resources page.

For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest:

gem install minitest

If you would like color output, you can require 'minitest/pride' in the test file, or note the alternative instruction, below, for running the test file.

Run the tests from the exercise directory using the following command:

ruby gigasecond_test.rb

To include color from the command line:

ruby -r minitest/pride gigasecond_test.rb


Chapter 9 in Chris Pine's online Learn to Program tutorial. http://pine.fm/LearnToProgram/?Chapter=09

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.


require 'minitest/autorun'
require_relative 'gigasecond'

# Common test data version: 1.1.0 5506bac
class GigasecondTest < Minitest::Test
  def test_date_only_specification_of_time
    # skip
    assert_equal Time.utc(2043, 1, 1, 1, 46, 40), Gigasecond.from(Time.utc(2011, 4, 25, 0, 0, 0))

  def test_second_test_for_date_only_specification_of_time
    assert_equal Time.utc(2009, 2, 19, 1, 46, 40), Gigasecond.from(Time.utc(1977, 6, 13, 0, 0, 0))

  def test_third_test_for_date_only_specification_of_time
    assert_equal Time.utc(1991, 3, 27, 1, 46, 40), Gigasecond.from(Time.utc(1959, 7, 19, 0, 0, 0))

  def test_full_time_specified
    assert_equal Time.utc(2046, 10, 2, 23, 46, 40), Gigasecond.from(Time.utc(2015, 1, 24, 22, 0, 0))

  def test_full_time_with_day_roll_over
    assert_equal Time.utc(2046, 10, 3, 1, 46, 39), Gigasecond.from(Time.utc(2015, 1, 24, 23, 59, 59))
class Gigasecond
  def self.from(time)
    time + 10**9

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