Class: ContinuedFractionTest

Inherits:
Test::Unit::TestCase
  • Object
show all
Includes:
MoreMath
Defined in:
tests/continued_fraction_test.rb

Constant Summary

Constants included from MoreMath

MoreMath::Infinity, MoreMath::STD_NORMAL_DISTRIBUTION, MoreMath::VERSION, MoreMath::VERSION_ARRAY, MoreMath::VERSION_BUILD, MoreMath::VERSION_MAJOR, MoreMath::VERSION_MINOR

Instance Method Summary collapse

Instance Method Details

#setup ⇒ Object 



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# File 'tests/continued_fraction_test.rb', line 9

def setup
  @zero = ContinuedFraction.for_a([-1,2,3]).for_b([2,3,3])
  @none1 = ContinuedFraction.for_a proc {}
  @none2 = ContinuedFraction.for_a {}
  @phi = ContinuedFraction.new
  @finite = ContinuedFraction.for_a [3, 4, 12, 3, 1]
  @sqrt_2 = ContinuedFraction.for_a { |n| n == 0 ? 1 : 2 }
  @pi_finite = ContinuedFraction.for_a [3, 7, 15, 1, 292, 1, 1, 1, 2]
  @e = ContinuedFraction.for_a { |n| (n + 1) }.for_b { |n| (n + 1) }
  @a113011 = ContinuedFraction.for_a { |n| 2 * n + 1 }.for_b { |n| 2 * n }
  @a073333 = ContinuedFraction.for_a { |n| n }.for_b { |n| n }
  @atan = ContinuedFraction.for_a do |n, x|
    n == 0 ? 0 : 2 * n - 1
  end.for_b do |n, x|
    n <= 1 ? x : ((n - 1) * x) ** 2
  end
  @pi = lambda { 4 * @atan[1] }
end

#test_continued_fractions ⇒ Object 



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# File 'tests/continued_fraction_test.rb', line 28

def test_continued_fractions
  assert @zero[].zero?
  assert @none1[1].nan?
  assert @none2[1].nan?
  assert_in_delta 1.618033, @phi[], 1E-6
  assert_in_delta 3.245, @finite[], 1E-4
  assert_in_delta Math.sqrt(2), @sqrt_2[], 1E-10
  assert_in_delta Math::PI, @pi_finite[], 1E-10
  assert_in_delta Math::E, 1 + @e[], 1E-10
  assert_in_delta 1.541494, @a113011[], 1E-6
  assert_in_delta 0.581976, @a073333[], 1E-6
  assert_in_delta Math.atan(0.5), @atan[0.5], 1E-10
  assert_in_delta Math::PI, @pi[], 1E-10
end

#test_invalid_arguments ⇒ Object 



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# File 'tests/continued_fraction_test.rb', line 43

def test_invalid_arguments
  assert_raise(ArgumentError) { ContinuedFraction.for_a }
  assert_raise(ArgumentError) { ContinuedFraction.for_b }
end

#test_to_proc ⇒ Object 



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# File 'tests/continued_fraction_test.rb', line 49

def test_to_proc
  atan = @atan.to_proc
  assert_kind_of Proc, atan
  assert_in_delta Math::PI, 4 * atan[1], 1E-10
end