From: Martin DeMello <martindemello@...>
Date: 2012-04-30T11:15:52+09:00
Subject: Re: Need help with unit test

raise "string" does raise a RuntimeError. If you want a custom
exception class, you need to create it first:

ruby-1.9.3-p0 > begin; raise "hello world"; rescue Exception => e;
puts "rescued #{e.class}"; end
rescued RuntimeError

ruby-1.9.3-p0 > class BadValue < Exception; end

ruby-1.9.3-p0 > begin; raise BadValue.new("hello world"); rescue
Exception => e; puts "rescued #{e.class}"; end
rescued BadValue

martin

On Sun, Apr 29, 2012 at 6:35 PM, Thi N. <lists@ruby-forum.com> wrote:
> Hi all,
> I'm a newbie to Ruby. I tried the below code but don't understand why
> the "test_typecheck" does not give any error. Could someone shed a light
> to my problem ?
> thanks
> tony
>
>
> test1.rb
> ========
>
> require 'test/unit'
>
> class SimpleNumber
>
>  def initialize( num )
>    raise "input must be a number" unless num.is_a?(Numeric)
>    @x = num
>  end
>
>  def add( y )
>    @x + y
>  end
>
>  def multiply( y )
>    @x * y
>  end
>
> end
>
> #error = SimpleNumber.new('abc') <== this raises exeption
>
>
> class TestSimpleNumber < Test::Unit::TestCase
>
>  def test_simple
>    assert_equal(4, SimpleNumber.new(2).add(2) )
>    assert_equal(4, SimpleNumber.new(2).multiply(2) )
>  end
>
>  def test_typecheck
>    assert_raise( RuntimeError ) { SimpleNumber.new('abc') }
>  end
> end
>
>
>
> =====================
> I would expect to see assertion failure for test_typecheck but it does
> not give any.
>
> output
> ======
>
> Run options:
>
> # Running tests:
>
> ..
>
> Finished tests in 0.006836s, 292.5688 tests/s, 438.8531 assertions/s.
>
> 2 tests, 3 assertions, 0 failures, 0 errors, 0 skips
>
> --
> Posted via http://www.ruby-forum.com/.
>