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@emadb emadb/berlin_clock.rb
Last active Aug 29, 2015

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Berlin clock kata implemented in ruby (http://content.codersdojo.org/code-kata-catalogue/berlin-clock/)
class BerlinClock
SECONDS = "Y"
HOURS_FIVES = "RRRR"
HOURS_ONES = "RRRR"
MINUTES_FIVES = "YYRYYRYYRYY"
MINUTES_ONES = "YYYY"
def initialize(h,m,s)
@h, @m, @s = h, m, s
end
def format(line, part, op, mod=5)
on_count = part.public_send(op, mod)
off_count = line.length - on_count
line[0, on_count] + "O" * off_count
end
def seconds
format(SECONDS, @s + 1, :%, 2)
end
def hours_fives
format(HOURS_FIVES, @h, :/)
end
def hours_ones
format(HOURS_ONES, @h, :%)
end
def minutes_ones
format(MINUTES_ONES, @m, :%)
end
def minutes_fives
format(MINUTES_FIVES, @m, :/)
end
def to_s
"#{seconds}\n#{hours_fives}\n#{hours_ones}\n#{minutes_fives}\n#{minutes_ones}"
end
end
require './lib/berlin_clock'
describe BerlinClock do
it 'midnight all lights are off, but Y' do
clock = BerlinClock.new(0,0,0)
expect(clock.to_s).to eq("Y\nOOOO\nOOOO\nOOOOOOOOOOO\nOOOO")
end
it '1 second after midnight all lights are off' do
clock = BerlinClock.new(0,0,1)
expect(clock.to_s).to eq("O\nOOOO\nOOOO\nOOOOOOOOOOO\nOOOO")
end
it '1 hour after midnight third row has 1 light on' do
clock = BerlinClock.new(1,0,0)
expect(clock.to_s).to eq("Y\nOOOO\nROOO\nOOOOOOOOOOO\nOOOO")
end
it '2 hours after midnight third row has 2 light on' do
clock = BerlinClock.new(2,0,0)
expect(clock.to_s).to eq("Y\nOOOO\nRROO\nOOOOOOOOOOO\nOOOO")
end
it '5 hours after midnight second row has 1 light on' do
clock = BerlinClock.new(5,0,0)
expect(clock.to_s).to eq("Y\nROOO\nOOOO\nOOOOOOOOOOO\nOOOO")
end
it '6 hours after midnight second row has 1 light on and third has 1 light' do
clock = BerlinClock.new(6,0,0)
expect(clock.to_s).to eq("Y\nROOO\nROOO\nOOOOOOOOOOO\nOOOO")
end
it '13 hours after midnight second row has 2 lights on and third has 3 lights' do
clock = BerlinClock.new(13,0,0)
expect(clock.to_s).to eq("Y\nRROO\nRRRO\nOOOOOOOOOOO\nOOOO")
end
it '1 minute after midnight last row has 1 lights on' do
clock = BerlinClock.new(0,1,0)
expect(clock.to_s).to eq("Y\nOOOO\nOOOO\nOOOOOOOOOOO\nYOOO")
end
it '5 minutes after midnight minutes row has 1 lights on' do
clock = BerlinClock.new(0,5,0)
expect(clock.to_s).to eq("Y\nOOOO\nOOOO\nYOOOOOOOOOO\nOOOO")
end
it '13:17:01' do
clock = BerlinClock.new(13,17,01)
expect(clock.to_s).to eq("O\nRROO\nRRRO\nYYROOOOOOOO\nYYOO")
end
it '23:59:59' do
clock = BerlinClock.new(23,59,59)
expect(clock.to_s).to eq("O\nRRRR\nRRRO\nYYRYYRYYRYY\nYYYY")
end
it '24:00:00' do
clock = BerlinClock.new(24,00,00)
expect(clock.to_s).to eq("Y\nRRRR\nRRRR\nOOOOOOOOOOO\nOOOO")
end
end
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