assert-random

Assert random is a simple gem that extends the test/unit assertions to include an assert-random test. Assert random works like any other assertion and accepts a block of code. Assert random checks this block of code records the results of the output. The out put is then checked for the following…

Identical results
Sequences of numbers (eg… 1 2 3 4 or… 10 20 30 etc)

Usage(Will pass):

def test_something
   assert_random do
      rand(1000)
   end
end

Usage(Will fail):

def test_something_else
   assert_random do
      1000
   end
end

Tolerance

Random numbers and results are hard to test. If your generating with in a small range of numbers say 1 to 10 then you can’t guarantee that the same number will not come up twice. This is despite the generator working correctly. For cases like this assert-random supports the tolerance option. Tolerance allows the test to tolerate more than one instance of a number from a narrow range.

Tolerance Usage:

def test_tolerance
   assert_random :tolerance => 5 do
      rand(10)
   end
end

The above example will pass even if the same number comes up 4 times.

assert-random

Tolerance

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