# Creating unit-test where RE required
**URL:** https://rubytalk.org/t/creating-unit-test-where-re-required/43869
**Category:** ruby-talk
**Created:** [18 January 2008 05:20 UTC](https://rubytalk.org/t/creating-unit-test-where-re-required/43869 "2008-01-18T05:20:04Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Richard3](https://rubytalk.org/u/Richard3)
#### Post date: [18 January 2008 05:20 UTC](https://rubytalk.org/t/creating-unit-test-where-re-required/43869/1 "2008-01-18T05:20:04Z")
Hi All,
I have a Search class with a :nameRE setter which may validly be
either nil or a regular expression.
I setup the unit test:
def test\_002\_IfNameGivenThenRE
@search.nameRE = '/\.rb$'
assert\_raise(RuntimeError, @search.run)
end
search.run invokes validate which in turn invokes:
fail "'#{@nameRE.source}' is not a valid regular expression for
nameRE!" if
@nameRE && Regexp.new(@nameRE).class != Regexp
That lead to the unit test result:
2) Failure:
test\_002\_IfNameGivenThenRE(TestValidation) [UnitTestSearch.rb:23]:
\ exception expected but was
Class: \
Message: \<"no block given"\>
So I thought I should change the assert to:
@search.nameRE = '/\.rb$'
assert\_raise(LocalJumpError, @search.run)
but that gave me the test result: Only other failures but none for
the nameRE.
Did I present my question clearly? Any ideas?
Thanks in Advance,
Richard
---
### Author:  [@Paul\_McMahon1](https://rubytalk.org/u/Paul_McMahon1)
#### Post date: [18 January 2008 05:57 UTC](https://rubytalk.org/t/creating-unit-test-where-re-required/43869/2 "2008-01-18T05:57:01Z")
You are using assert\_raise improperly. It should be
assert\_raise(RuntimeError) do
@search.run
end
see [http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692](http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692)
---
### Author:  [@Richard3](https://rubytalk.org/u/Richard3)
#### Post date: [19 January 2008 03:10 UTC](https://rubytalk.org/t/creating-unit-test-where-re-required/43869/3 "2008-01-19T03:10:19Z")
> You are using assert\_raise improperly. It should be
>
> assert\_raise(RuntimeError) do
> @search.run
> end
>
> see [http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692](http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692)
Hi Paul,
> [http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692](http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692)
Thanks for the reference.
OK, I've got it: here are the first two validation expressions in
Search#validate:
fail "Starting search directory is required: " +
(@dirname ? ('"' + @dirname + '"') : 'nil') +
" is not a directory" unless
@dirName && File.directory?(@dirName)
fail "'#{@nameRE}' is not a valid regular expression for nameRE!" if
@nameRE && !@nameRE.instance\_of?(Regexp)
The corresponding unit tests (all of which succeed) are:
def test\_000\_DirRequired
@search.dirName = nil
assert\_raise(RuntimeError) {@search.run}
end
def test\_001\_DirMustBeValid
@search.dirName = '../no\_such\_dir'
assert\_raise(RuntimeError) {@search.run}
end
def test\_002\_IfNameGivenThenRE
@search.nameRE = '/\.rb$'
assert\_raise(RuntimeError) {@search.run}
end
And everything works as expected when actually using the setters for a
real invocation of Search.
Thanks for your help.
Best wishes,
Richard
> **ยทยทยท**
>
> On Jan 18, 12:57 am, Paul McMahon \ wrote: