Test::Unit::TestCase not resolving correctly

Ruby
1

I have test case that is failing.

===============================================================

  1. Failure: testProj(TestProject) [---------\TestProject.rb:26]:
    <“068906”> expected but was <“68906”>.
    1 tests, 1 assertions, 1 failures, 0 errors
    ===============================================================

In the assignment of the class variable value, the first assert_equal
test case appears to be comparing the expected value to the input of
the class variable assignment…not the value returned by the
assigment. The two asserts that follow the first yield the correct
result, so I know the assignment of the class variable is correct. Any
suggestions as to what I might be doing wrong in the first assert?

===============================================================
Given the following in my test case:

class TestProject < Test::Unit::TestCase
def setup
@prj=Project.new # new project
end

def testProj
assert_equal(‘068906’,@prj.proj=‘68906’)
assert_equal(true,@prj.proj==‘068906’)
assert_equal(false,@prj.proj==‘68906’)
end
end

===============================================================
And given the following function being called to assign the value of
the class variable.

Set the project number. # Project number gets tranlated to the

format “nnnnnn”, and is zero filled. Note: while zero filling is

the proper display of the project number, it does cause problems

when trying to find folder names.

def proj=(num)
if num.class == String
raise ArgumentError,“Project number #{num} must be in the form
<#>nnnnnn” if num !~/#*(\d{1,6})/
n = $1.to_i
elsif num.class == Fixnum
n = num
elsif num.class == Float
n = num.to_i
else
raise ArgumentError,“Project number #{num} is in an
unrecognizable format”
end
@proj = sprintf("%06d",n)
end

===============================================================
The following test case does work
1 tests, 2 assertions, 0 failures, 0 errors

def testProj
@prj.proj=‘68906’

assert_equal(“068906”,@prj.proj=‘68906’)

  assert_equal(true,@prj.proj=='068906')
  assert_equal(false,@prj.proj=='68906')

end

Your time, as always, is appreciated…
dvn

2

Hi –

On Wed, 30 Aug 2006, [email protected] wrote:

In the assignment of the class variable value, the first assert_equal

s/class variable/instance variable/

test case appears to be comparing the expected value to the input of
the class variable assignment…not the value returned by the
assigment.

An assignment returns its right-hand side. This rule applies even to
pseudo-assignment method calls:

class C
attr_reader :x
def x=(y)
@x = 100
end
end

c = C.new
p c.x = 1 # prints 1, not 100
p c.x # prints 100

The idea is to make the assignment-like method calls truly
assignment-like.

David

3

On Aug 29, 2006, at 4:50 PM, [email protected] wrote:

the class variable assignment…not the value returned by the
def setup

     raise ArgumentError,"Project number #{num} must be in the  
  end
  assert_equal(true,@prj.proj=='068906')
  assert_equal(false,@prj.proj=='68906')

end

Your time, as always, is appreciated…
dvn

obj.meth = x always returns x, regardless of what the method would
return in normal circumstances. You should test like this:

@prj.proj = ‘68906’

assert_equal( ‘068906’, @prj.proj )

% cat assigns.rb
class A
def f=(x)
false
end
end

a = A.new
p a
p( a.f = 22 )

% ruby assigns.rb
#<A:0x1e9328>
22