9th class: assert_equal

Reference site

Chart type ruby-IV (assert \ _equal)

Theme: Let's make assert \ _equal

Let's create a function assert \ _equal that checks if two variables are equal

Implementation example

When simply implemented, it looks like this

require 'colorize'

def assert_equal(expected, result)
  p ['expected',expected]
  p ['result',result]
  if expected == result
    puts 'true'.green
  else
    puts 'false'.red
  end
end

if $PROGRAM_NAME == __FILE__
  assert_equal(1, 1)
  assert_equal(1, 2)
end

The output result looks like this

["expected", 1]
["result", 1]
true
["expected", 1]
["result", 2]
false

You can change the font color with colorize Because the output result of this page is just copied and pasted from the terminal The color is not reflected, but the text color is the output result in the terminal true is green and false is red

If you get angry that there is no colorize, install it

> gem install colorize

EX

Add assert \ _not \ _equal that returns the opposite result of assert \ _equal

require 'colorize'

def puts_vals(expected, result)
  puts "expected : #{expected}"
  puts "result : #{result}"
end

def assert_equal(expected, result)
  puts_vals(expected, result)
  if expected == result
    puts "succeeded in #{__method__}.".green
  else
    puts "failed in #{__method__}.".red
  end
end

def assert_not_equal(expected, result)
  puts_vals(expected, result)
  if expected != result
    puts "succeeded in #{__method__}.".green
  else
    puts "failed in #{__method__}.".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

The execution result is as follows

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.

note

・ Assert \ _equal will be used repeatedly in the future If you write if $ PROGRAM \ _NAME == \ _ \ _ FILE \ _ \ _ in the test part, the operation enclosed in this part will be Stops executing when called from an external file How to call it next time

• source ~/grad_members_20f/members/batamon-427/task9.org