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|
# frozen_string_literal: true
RSpec.describe GameOfLife do
describe ".parsed_options" do
let(:options) do
{
"live-cell" => "L",
"dead-cell" => "D",
}
end
before do
console = instance_double("<File:/dev/tty>")
allow(IO).to receive(:console).and_return(console)
allow(console).to receive(:winsize).and_return([10, 20])
end
context "with options['delay']" do
it "raises GameOfLife::Error when negative" do
options["delay"] = -13
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --delay value/)
end
it "uses options['delay'] when posotive" do
options["delay"] = 15
expect(described_class.parsed_options(options)).to include("delay" => 15)
end
end
context "with options['width']" do
it "raises GameOfLife::Error when < 1" do
options["width"] = 0
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --width value/)
end
it "raises GameOfLife::Error when > IO.console.winsize[1]" do
options["width"] = 23
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --width value/)
end
it "uses options['width']" do
options["width"] = 15
expect(described_class.parsed_options(options)).to include("width" => 15)
end
it "uses IO.console.winsize[1] as default" do
expect(described_class.parsed_options(options)).to include("width" => 20)
end
end
context "with options['height']" do
it "raises GameOfLife::Error < 1" do
options["height"] = 0
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --height value/)
end
it "raises GameOfLife::Error when > winsize[0] - 2" do
options["height"] = 9
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --height value/)
end
it "uses options['height']" do
options["height"] = 5
expect(described_class.parsed_options(options)).to include("height" => 5)
end
it "uses IO.console.winsize[0] - 2 as default" do
expect(described_class.parsed_options(options)).to include("height" => 8)
end
end
context "with options['live-cell']" do
it "raises GameOfLife::Error if live-cell is multiple characters" do
options["live-cell"] = "LL"
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --live-cell /)
end
end
context "with options['dead-cell']" do
it "raises GameOfLife::Error if dead-cell is multiple characters" do
options["dead-cell"] = "DD"
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --dead-cell /)
end
it "raises GameOfLife::Error if dead-cell is same as live-cell character" do
options = { "live-cell" => "X", "dead-cell" => "X" }
expect { described_class.parsed_options(options) }.to raise_error(GameOfLife::Error, /Invalid --dead-cell /)
end
end
context "with options['seed']" do
it "uses options['seed']" do
options["seed"] = 1337
expect(described_class.parsed_options(options)).to include("seed" => 1337)
end
# rubocop:disable RSpec/AnyInstance
it "defaults to Kernel.random" do
allow_any_instance_of(Kernel).to receive(:rand).and_return "random"
expect(described_class.parsed_options(options)).to include("seed" => "random")
end
# rubocop:enable RSpec/AnyInstance
end
end
describe ".generate" do
let(:options) do
{
"live-cell" => "L",
"dead-cell" => "D",
"delay" => 100,
"width" => 10,
"height" => 20,
"seed" => 500,
}
end
context "with options['input']" do
before { options["input"] = "./file.txt" }
it "defines configurations constants" do
expect(described_class::Cell).to receive(:const_set).with(:LIVE_CELL, "L")
expect(described_class::Cell).to receive(:const_set).with(:DEAD_CELL, "D")
expect(described_class).to receive(:const_set).with(:DELAY, 100.0)
expect(described_class).to receive(:const_set).with(:BANNER, "Input: ./file.txt")
allow(described_class::Generators::Input).to receive(:new)
described_class.generate(options)
end
it "calls Generators::Input.new" do
allow(described_class::Cell).to receive(:const_set)
allow(described_class).to receive(:const_set)
expect(described_class::Generators::Input).to receive(:new).with(options)
described_class.generate(options)
end
end
context "without options['input']" do
before { options["seed"] = 1337 }
it "defines configurations constants" do
expect(described_class::Cell).to receive(:const_set).with(:LIVE_CELL, "L")
expect(described_class::Cell).to receive(:const_set).with(:DEAD_CELL, "D")
expect(described_class).to receive(:const_set).with(:DELAY, 100.0)
expect(described_class).to receive(:const_set).with(:BANNER, "Seed: 1337")
allow(described_class::Generators::Seed).to receive(:new)
described_class.generate(options)
end
it "calls Generators::Seed.new" do
allow(described_class::Cell).to receive(:const_set)
allow(described_class).to receive(:const_set)
expect(described_class::Generators::Seed).to receive(:new).with(options)
described_class.generate(options)
end
end
end
describe ".run" do
let(:universe) { GameOfLife::Universe.new(width: 3, height: 3) }
it "calls universe#evolve! and #{described_class}.run" do
# allow kernel loop tiwce
allow(Kernel).to receive(:loop).and_yield.and_yield
expect(described_class).to receive(:render).with(universe).twice
expect(universe).to receive(:evolve!).twice
described_class.run(universe)
end
end
describe ".render" do
let(:universe) { GameOfLife::Universe.new(width: 3, height: 3) }
# rubocop:disable RSpec/AnyInstance
it "renders the game of life presentation" do
stub_const("BANNER", "")
stub_const("DELAY", 100.0)
expect_any_instance_of(Kernel).to receive(:puts).with("\33c\e[3J")
expect_any_instance_of(Kernel).to receive(:puts).twice
expect(universe).to receive(:to_s)
expect_any_instance_of(Kernel).to receive(:sleep)
described_class.render(universe)
end
# rubocop:enable RSpec/AnyInstance
end
end
|
