How can I use the "test/unit"

Ruby
1

when I run the following code

require ‘test/unit’
class TC_Pram < Test::Unit::TestCase
def initialize(name)
@name=name
end
def test_array
puts assert_equal(2,@name[2])
end
end
tc=TC_Pram.new(“wang”)
tc.test_array

there are some errors as follows

c:/ruby/lib/ruby/1.8/test/unit/testcase.rb:125:in add_assertion': undefined methodadd_assertion’ for nil:NilClass (NoMethodError)
from c:/ruby/lib/ruby/1.8/test/unit/assertions.rb:494:in
_wrap_assertion' from c:/ruby/lib/ruby/1.8/test/unit/assertions.rb:46:inassert_block’
from c:/ruby/lib/ruby/1.8/test/unit/assertions.rb:83:in
assert_equal' from test_unit.rb:7:intest_array’
from test_unit.rb:11

I don’t know how to resolve it , so I need your help , thanks

2

def initialize(name)
@name=name
end
def test_array
puts assert_equal(2,@name[2])
end
end
tc=TC_Pram.new(“wang”)
tc.test_array

You don’t want to use initialize. You want to use setup.

class TC_Pram < Test::Unit::TestCase
def setup
@name = ‘wang’
end

def test_array
assert_equal(2, @name[2])
end
end

You don’t need to instantiate an instance of TC_Pram. Just run the file.

Regards,

Dan