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31 lines
555 B
31 lines
555 B
require "minitest/autorun"
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def exec(instructions)
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return enum_for(__method__, instructions) unless block_given?
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x = 1
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instructions.each do |instruction|
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case instruction
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when /noop/
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yield x
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when /addx (-?\d+)/
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yield x
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yield x
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x += $1.to_i
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else
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fail "invalid instruction: #{instruction}"
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end
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end
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yield x
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end
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class TestDay10 < Minitest::Test
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def test_example
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assert_equal [1, 1, 1, 4, 4, -1], exec(<<~PROG.lines(chomp: true)).to_a
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noop
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addx 3
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addx -5
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PROG
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end
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end
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