Sha256: f255099ad3af88df811f682dcc9a9bf3ca1ac0f0199e9b30173525bba74f2865
Contents?: true
Size: 1.12 KB
Versions: 7
Compression:
Stored size: 1.12 KB
Contents
require "spec_helper"
require "hamster/immutable"
describe Hamster::Immutable do
class TransformUnlessPerson < Struct.new(:first, :last)
include Hamster::Immutable
public :transform_unless
end
let(:immutable) { TransformUnlessPerson.new("Simon", "Harris") }
describe "#transform_unless" do
let(:transform_unless) { immutable.transform_unless(condition, &block) }
let(:original) { immutable.first }
let(:modified) { transform_unless.first }
context "when the condition is false" do
let(:condition) { false }
let(:block) { ->(thing) { self.first = "Sampy" } }
it "preserves the original" do
expect(original).to eq("Simon")
end
it "returns a new instance with the updated values" do
expect(modified).to eq("Sampy")
end
end
context "when the condition is true" do
let(:condition) { true }
let(:block) { -> { fail("Should never be called") } }
it "preserves the original" do
expect(original).to eq("Simon")
end
it "returns the original" do
expect(original).to eq(modified)
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems