# Using testrb

**URL:** <https://www.ruby-forum.com/t/using-testrb/75810>\
**Category:** Ruby\
**Created:** [March 2, 2006, 6:52pm UTC](https://www.ruby-forum.com/t/using-testrb/75810 "2006-03-02T18:52:44Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jmaenpaa](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9de053/32.png) [@jmaenpaa](https://www.ruby-forum.com/u/jmaenpaa)\
**Post date:** [March 2, 2006, 6:52pm UTC](https://www.ruby-forum.com/t/using-testrb/75810/1 "2006-03-02T18:52:44Z")

</div>

My script _works_ but testrb is giving me some error messages. I’ve just  
come across unit testing yestarday so I’m quite new to this. What do  
these error messages mean and why does the script not run?

A sample script:-

jayeola@acid$ cat fact.rb  
def fact(n)  
return 1 if n == 0  
f = 1  
n.downto(1) do |i|  
f \*= i  
end  
return f  
end  
print fact(ARGV[0].to\_i), “\n”

sample usage:-  
jayeola@acid$ ruby fact.rb 44  
2658271574788448768043625811014615890319638528000000000

using testrb:-

jayeola@acid$ testrb ruby fact.rb 4  
/usr/lib/ruby/1.8/test/unit/collector/dir.rb:83:in `require': no such file to load -- ruby (LoadError) from /usr/lib/ruby/1.8/test/unit/collector/dir.rb:83:in`collect\_file’  
from /usr/lib/ruby/1.8/test/unit/collector/dir.rb:70:in  
`recursive_collect' from /usr/lib/ruby/1.8/test/unit/collector/dir.rb:30:in`collect’  
from /usr/lib/ruby/1.8/test/unit/collector/dir.rb:29:in `collect' from /usr/lib/ruby/1.8/test/unit/autorunner.rb:67 from /usr/lib/ruby/1.8/test/unit/autorunner.rb:198:in`run’  
from /usr/bin/testrb:5

---

<div class="post-metadata">

**Author:** ![jmaenpaa](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9de053/32.png) [@jmaenpaa](https://www.ruby-forum.com/u/jmaenpaa)\
**Post date:** [March 2, 2006, 7:20pm UTC](https://www.ruby-forum.com/t/using-testrb/75810/2 "2006-03-02T19:20:18Z")

</div>

On 3/2/06, John M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> ```
> f *= i
> 
> ```
> 
> jayeola@acid$ testrb ruby fact.rb 4  
> /usr/lib/ruby/1.8/test/unit/collector/dir.rb:83:in `require’: no such  
> file to load – ruby (LoadError)

It can’t find a file to load named “ruby”.  
Try running “testrb fact.rb 4”.