Having trouble with how classes work - ruby-on-rails

Question

I'm testing this code for a class assignment to make sure it works.
I don't quite understand code yet. Maybe give me some pointers.
require 'minitest/autorun'
require './human'
require './coffee'
## This assignment made more sense when I wrote it in the morning.
class CaffeineTest < MiniTest::Test
def test_humans_tend_to_be_sleepy
tyler = Human.new "Tyler"
assert tyler.alertness < 0.1
end
def test_humans_need_coffee
randy = Human.new "Randy"
refute randy.has_coffee?
assert randy.needs_coffee?
end
def test_humans_can_drink_coffee
sherri = Human.new "Sherri"
tsmf = Coffee.new "Triple Shot Mocha Frappuccino"
assert tsmf.full?
sherri.buy tsmf
sherri.drink!
assert_in_epsilon sherri.alertness, 0.33, 0.1
refute tsmf.full?
refute tsmf.empty?
end
def test_humans_can_drink_all_the_coffee
trevor = Human.new "Trevor"
tsmf = Coffee.new "Triple Shot Mocha Frappuccino"
trevor.buy tsmf
3.times { trevor.drink! }
assert tsmf.empty?
assert trevor.alertness > 0.9
end
end
Here's what I've added to it.
class Human
def initialize(name)
#name = name
#alertness = 0.0
#flavor = Coffee.new(name)
#coffee = 0
end
def alertness
#alertness
end
def has_coffee?()
false
end
def needs_coffee?()
true
end
def drink!()
#alertness += 0.33
#coffee -= 0.33
end
def empty?
if #coffee <= 0
true
else
false
end
end
def buy(type)
#flavor
#coffee += 1 #add tsmf to some kind of array or some shit
end
end
class Coffee
def initialize(drink)
#coffee = 0
end
def full?
if #coffee >= 0
true
else
false
end
end
def has_coffee?
false
end
end
I keep getting failures on empty? and full?. Please guide me a little here.

Answer 1

require 'minitest/autorun'
## This assignment made more sense when I wrote it in the morning.
class CaffeineTest < MiniTest::Test
def test_humans_tend_to_be_sleepy
tyler = Human.new "Tyler"
assert tyler.alertness < 0.1
end
def test_humans_need_coffee
randy = Human.new "Randy"
refute randy.has_coffee?
assert randy.needs_coffee?
end
def test_humans_can_drink_coffee
sherri = Human.new "Sherri"
tsmf = Coffee.new "Triple Shot Mocha Frappuccino"
assert tsmf.full?
sherri.buy tsmf
sherri.drink!
assert_in_epsilon sherri.alertness, 0.33, 0.1
refute sherri.empty?
end
def test_humans_can_drink_all_the_coffee
trevor = Human.new "Trevor"
tsmf = Coffee.new "Triple Shot Mocha Frappuccino"
trevor.buy tsmf
3.times { trevor.drink! }
assert tsmf.empty?
assert trevor.alertness > 0.9
end
end
class Human
def initialize(name)
#name = name
#alertness = 0.0
#flavor = Coffee.new(name)
#coffee = 0
end
def alertness
#alertness
end
def has_coffee?()
false
end
def needs_coffee?()
true
end
def drink!()
#alertness += 0.33
#coffee -= 0.33
end
def empty?
if #coffee <= 0
true
else
false
end
end
def buy(type)
#flavor
#coffee += 1 #add tsmf to some kind of array or some shit
end
end
class Coffee
def initialize(drink)
#coffee = 0
end
def full?
if #coffee >= 0
true
else
false
end
end
def has_coffee?
false
end
def empty?
if #coffee <= 0
true
else
false
end
end
end