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require 'test_helper'
class InterpTest < GSL::TestCase
def test_bsearch
x_array = GSL::Vector.alloc(0.0, 1.0, 2.0, 3.0, 4.0)
res = GSL::Interp.bsearch(x_array, 1.5, 0, 4)
refute res != 1, 'simple bsearch'
res = x_array.bsearch(4.0, 0, 4)
refute res != 3, 'upper endpoint bsearch'
res = GSL::Interp.bsearch(x_array, 0.0, 0, 4)
refute res != 0, 'lower endpoint bsearch'
res = GSL::Interp.bsearch(x_array, 2.0, 0, 4)
refute res != 2, 'degenerate bsearch'
res = GSL::Interp.bsearch(x_array, 10.0, 0, 4)
refute res != 3, 'out of bounds bsearch +'
res = GSL::Interp.bsearch(x_array, -10.0, 0, 4)
refute res != 0, 'out of bounds bsearch -'
end
end
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