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# frozen_string_literal: true
RSpec.describe GameOfLife::Generators::Input do
describe ".new" do
let(:file) { instance_double(File) }
it "returns a GameOfLife::Universe" do
options = { "input" => "something", "width" => 1, "height" => 1 }
allow(URI).to receive(:open).and_return(file)
allow(file).to receive(:read).and_return(options["input"])
expect(described_class.new(options)).to be_a GameOfLife::Universe
end
it "parses alpha-numeric characters as living cells" do
options = { "input" => "Conway's Game of Life", "width" => 21, "height" => 1 }
allow(URI).to receive(:open).and_return(file)
allow(file).to receive(:read).and_return(options["input"])
stub_const("GameOfLife::Cell::LIVE_CELL", "X")
stub_const("GameOfLife::Cell::DEAD_CELL", ".")
# Conway's Game of Life
expect(described_class.new(options).to_s).to eq "XXXXXX.X.XXXX.XX.XXXX"
end
it "fills the rest of universe with dead cells" do
options = { "input" => "Conway's Game of Life", "width" => 25, "height" => 2 }
allow(URI).to receive(:open).and_return(file)
allow(file).to receive(:read).and_return(options["input"])
stub_const("GameOfLife::Cell::LIVE_CELL", "X")
stub_const("GameOfLife::Cell::DEAD_CELL", ".")
# Conway's Game of Life
universe = "XXXXXX.X.XXXX.XX.XXXX....\n" \
"........................."
expect(described_class.new(options).to_s).to eq universe
end
it "truncates the content of the file to match the width" do
options = { "input" => "Conway's Game of Life", "width" => 11, "height" => 3 }
allow(URI).to receive(:open).and_return(file)
allow(file).to receive(:read).and_return(options["input"])
stub_const("GameOfLife::Cell::LIVE_CELL", "X")
stub_const("GameOfLife::Cell::DEAD_CELL", ".")
# Conway's Ga
universe = "XXXXXX.X.XX\n" \
"...........\n" \
"..........."
expect(described_class.new(options).to_s).to eq universe
end
it "rescues Errno::ENOENT and raises GameOfLife::Error" do
options = { "input" => "not-existing-file.txt", "width" => 25, "height" => 2 }
expect { described_class.new(options) }.to raise_error(
GameOfLife::Error,
"File isn't avaialable, please check it again and make sure the path to the input file is correct",
)
end
it "rescues SocketError and raises GameOfLife::Error" do
options = { "input" => "https://not-existing-url.com", "width" => 25, "height" => 2 }
expect { described_class.new(options) }.to raise_error(
GameOfLife::Error,
"URL isn't avaialable, please check it again and make sure the URL is correct",
)
end
it "rescues OpenURI::HTTPError and raises GameOfLife::Error" do
options = { "input" => "https://example.com/non-existing", "width" => 25, "height" => 2 }
expect { described_class.new(options) }.to raise_error(
GameOfLife::Error,
"URL isn't avaialable, please check it again and make sure the URL is correct",
)
end
end
end
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