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require "spec_helper"
describe Quantity do
describe "#to" do
it "converts lbs to kgs" do
lbs = Quantity.new(135.0, :lbs)
expect(lbs.to(:kg).to_f.round(1)).to eql(61.2)
end
it "converts kgs to kgs" do
kgs = Quantity.new(135.0, :kgs)
expect(kgs.to(:kgs).to_f).to eql(135.0)
end
it "converts kgs to lbs" do
kgs = Quantity.new(61.2, :kgs)
expect(kgs.to(:lbs).to_f.round(0)).to eql(135)
end
it "converts lbs to lbs" do
lbs = Quantity.new(135.0, :lbs)
expect(lbs.to(:lbs).to_f).to eql(135.0)
end
end
describe "#eql?" do
it "is equal when both are lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity).to eql(other)
end
it "is equal when both are kgs" do
quantity = Quantity.new(61.2, :kgs)
other = Quantity.new(61.2, :kgs)
expect(quantity).to eql(other)
end
it "is equal when different units" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(61.2, :kgs)
expect(quantity).to eql(other)
end
it "is equal to a float" do
quantity = Quantity.new(135.0, :lbs)
expect(quantity).to eql(135.0)
end
it "is not equal" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.2, :lbs)
expect(quantity).to_not eql(other)
end
end
describe "#+" do
it "adds lbs to lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity + other).to eql(Quantity.new(270.0, :lbs))
end
it "adds kgs to lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(61.2, :kg)
expect(quantity + other).to eql(Quantity.new(270.0, :lbs))
end
it "adds lbs to kgs" do
quantity = Quantity.new(61.2, :kg)
other = Quantity.new(135.0, :lbs)
expect(quantity + other).to eql(Quantity.new(122.4, :kg))
end
it "adds a float to lbs" do
quantity = Quantity.new(135.0, :lbs)
other = 135.0
expect(quantity + other).to eql(Quantity.new(270.0, :lbs))
end
end
describe "#-" do
it "subtracts lbs from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity - other).to eql(Quantity.new(0.0, :lbs))
end
it "subtracts kgs from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(61.2, :kg)
expect(quantity - other).to eql(Quantity.new(0.0, :lbs))
end
it "subtracts lbs from kgs" do
quantity = Quantity.new(61.2, :kg)
other = Quantity.new(135.0, :lbs)
expect(quantity - other).to eql(Quantity.new(0.0, :kg))
end
it "subtracts a float from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = 135.0
expect(quantity - other).to eql(Quantity.new(0.0, :lbs))
end
end
describe "#/" do
it "divides lbs from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity / other).to eql(Quantity.new(1.0, :lbs))
end
it "divides kgs from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(61.2, :kg)
expect(quantity / other).to eql(Quantity.new(1.0, :lbs))
end
it "divides lbs from kgs" do
quantity = Quantity.new(61.2, :kg)
other = Quantity.new(135.0, :lbs)
expect(quantity / other).to eql(Quantity.new(1.0, :kg))
end
it "divides a float from lbs" do
quantity = Quantity.new(135.0, :lbs)
other = 135.0
expect(quantity / other).to eql(Quantity.new(1.0, :lbs))
end
end
describe "#*" do
it "multiples lbs with lbs" do
quantity = Quantity.new(135.0, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity * other).to eql(Quantity.new(18_225.0, :lbs))
end
it "multiples a float with lbs" do
quantity = Quantity.new(135.0, :lbs)
other = 135.0
expect(quantity * other).to eql(Quantity.new(18_225.0, :lbs))
end
end
describe "#>" do
it "compares lbs with lbs" do
quantity = Quantity.new(135.1, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity).to be > other
expect(other).to_not be > quantity
end
end
describe "#>=" do
it "compares lbs with lbs" do
quantity = Quantity.new(135.2, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity).to be >= quantity
expect(quantity).to be >= other
expect(other).to_not be >= quantity
end
end
describe "#<" do
it "compares lbs with lbs" do
quantity = Quantity.new(135.1, :lbs)
other = Quantity.new(135.0, :lbs)
expect(quantity).to_not be < other
expect(other).to be < quantity
end
end
describe "#to_json" do
it 'format the amount and unit to json' do
expect(100.lbs.to_json).to eql({
amount: 100.0,
unit: 'lbs',
}.to_json)
end
end
end
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