Tests for 'is_three_of_a_kind' function
Tests for 'is_one_pair' method
Refactoring 'is_three_of_a_kind' method
Tests for 'is_flush' method
Refactoring
Tests for 'is_four_of_a_kind' method
Tests for 'is_full_house' method
Tests for 'is_royal_flush' method
Tests for 'is_royal_flush' method
Tests for 'is_royal_flush' method
Refactoring and tests improvements
Add Travis-CI support