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Versions: 233
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Stored size: 1.48 KB
Contents
require 'generator/exercise_case'
class AllYourBaseCase < Generator::ExerciseCase
def workload
indent_text(4, (assignments + assertion).join("\n"))
end
private
def assignments
[
"digits = #{input_digits}",
"input_base = #{input_base}",
"output_base = #{output_base}",
]
end
def assertion
return error_assertion unless expected_value
[
"expected = #{expected_value}",
"",
"converted = BaseConverter.convert(input_base, digits, output_base)",
"",
"assert_equal expected, converted,",
indent_text(13, error_message),
]
end
def error_assertion
[
"",
"assert_raises ArgumentError do",
" BaseConverter.convert(input_base, digits, output_base)",
"end",
]
end
def error_message
%q( "Input base: #{input_base}, output base #{output_base}. " \\) \
"\n" + %q("Expected #{expected} but got #{converted}.")
end
def expected_value
return expected if expected
case
when invalid_input_digits? || invalid_bases? then nil
when input_digits.empty? then []
when input_of_zero? then [0]
else
handle_special_cases
end
end
def invalid_input_digits?
input_digits.any? { |x| x < 0 || x >= input_base }
end
def invalid_bases?
input_base <= 1 || output_base <= 1
end
def input_of_zero?
input_digits.all? { |x| x == 0 }
end
def handle_special_cases
[4, 2] if input_digits == [0, 6, 0]
end
end
Version data entries
233 entries across 233 versions & 1 rubygems