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assert_equal
とりあえず，equalかどうかを調べる関数を書いてみる．
def assert_equal(expected, result)
return expected == result
end
p assert_equal(1,1)
p assert_equal(1,2)
実行結果
$ ruby assert_equal.rb
true
false
Colorize
trueとfalseは返すようになったが，パッと見で分かるようにしたい．
というわけで，
assert_equal.rb
require 'colorize'
def assert_equal(expected, result)
if expected == result
puts 'true'.green
else
puts 'false'.red
end
end
#assert_equal(1,1)
#assert_equal(1,2)
実行結果
$ ruby assert_equal.rb
true
false
trueが赤色に，falseが緑色に出力される．(example内で色付けるのどうするんだ？)
ちなみに，
$ irb
irb(main):001:0> require 'colorize'
=> true
irb(main):002:0> String.colors
=> [:black, :light_black, :red, :light_red, :green, :light_green, :yellow, :light_yellow, :blue, :light_blue, :magenta, :light_magenta, :cyan, :light_cyan, :white, :light_white, :default]
で，何色にcolorizeできるかがわかる．
出力をrichにする
今のままでは，ファイルの中の引数を書き換えねばならないので，修正する．
- 引数でとってきた，expectedとresultの値を表示する
- 結果の記述
- true: print "succeeded in assert_equal.\n".green
- false: print "failed in assert_equal.\n".red
assert_equal_ro.rb
require 'colorize'
def assert_equal(expected, result)
if expected == result
puts "expected :: #{expected}"
puts "result :: #{result}"
print "succeeded in #{__method__}.\n".green
else
puts "expected :: #{expected}"
puts "result :: #{result}"
print "failed in #{__method__}.\n".red
end
end
assert_equal(1,1)
assert_equal(1,2)
実行結果
$ ruby assert_equal_ro.rb
expected :: 1
result :: 1
succeeded in assert_equal.
expected :: 1
result :: 2
failed in assert_equal.
assert_not_equal
必要とは思えないが，not_equalでtrueな関数を書く．
assert_not_equal_ro.rb
require 'colorize'
def assert_not_equal(expected, result)
if expected != result
puts "expected :: #{expected}"
puts "result :: #{result}"
print "succeeded in #{__method__}.\n".green
else
puts "expected :: #{expected}"
puts "result :: #{result}"
print "failed in #{__method__}.\n".red
end
end
assert_not_equal(1,2)
assert_not_equal(1,1)
実行結果
$ ruby assert_not_equal_ro.rb
expected :: 1
result :: 2
succeeded in assert_not_equal.
expected :: 1
result :: 1
failed in assert_not_equal.
関数の整理
今のままでは重複した処理がある．
- puts "expected: #{expected}"
- puts "result: #{result}"
これを別の関数にして，整理する．
aero.rb
require 'colorize'
def puts_value(expected, result)
puts "expected :: #{expected}"
puts "result :: #{result}"
end
def assert_equal(expected, result)
puts_value(expected, result)
if expected == result
print "succeeded in #{__method__}.\n".green
else
print "failed in #{__method__}.\n".red
end
end
def assert_not_equal(expected, result)
puts_value(expected, result)
if expected != result
print "succeeded in #{__method__}.\n".green
else
print "failed in #{__method__}.\n".red
end
end
if $PROGRAM_NAME == __FILE__
assert_equal(1,1)
assert_equal(1,2)
assert_not_equal(1,2)
assert_not_equal(1,1)
end
実行結果
$ ruby aero.rb
expected :: 1
result :: 1
succeeded in assert_equal.
expected :: 1
result :: 2
failed in assert_equal.
expected :: 1
result :: 2
succeeded in assert_not_equal.
expected :: 1
result :: 1
failed in assert_not_equal.
case
caseの存在を忘れてた．
aeroc.rb
require 'colorize'
def puts_vals(expected, result)
puts "expected :: #{expected}"
puts "result :: #{result}"
end
def assert_equal(expected, result)
puts_vals(expected, result)
print case expected == result
when true; "succeeded in #{__method__}.\n".green
when false; "failed in #{__method__}.\n".red
end
end
def assert_not_equal(expected, result)
puts_vals(expected, result)
print case expected != result
when true; "succeeded in #{__method__}.\n".green
when false; "failed in #{__method__}.\n".red
end
end
if $PROGRAM_NAME == __FILE__
assert_equal(1, 1)
assert_equal(1, 2)
assert_not_equal(1, 2)
assert_not_equal(1, 1)
end
これで完成．
と思って講義資料を見てみると，caseの部分，
print expected != result ?
"succeeded in #{__method__}.\n".green :
"failed in #{__method__}.\n".red
っていう書き方もあるみたい．
さらに，重複実行の予防のidiomとして，
if $PROGRAM_NAME == __FILE__
assert_equal(1, 1)
assert_equal(1, 2)
assert_not_equal(1, 2)
assert_not_equal(1, 1)
end
別のコードで本コードのmethodを引用したいときに，重複実行されないように予防．
/codeが書いてあるファイル名(FILE)が，動いているファイル名($PROGRAM_NAME)と一致したら中身を実行/とある．
どういう意味なんだ．．．（分かる方，コメントお願いします．）
Rubular
正規表現
文字情報を取り出す便利ツールな正規表現(regular expression)
Rubularとやらを使って勉強する．
Regex quick referenceが載ってるので，自分でいろいろ試してみよう．
気が向いたら，講義資料読んで解説するね．
締め
今回は関数と正規表現について学んだ．
授業外の内容も書いてるから書く量が多いわ．．．
- source ~/school/multi/my_ruby/grad_members_20f/members/evendemiaire/post/assert.org