Contents

require 'spec_helper'

describe Dydx do
  it 'has a version number' do
    expect(Dydx::VERSION).not_to be nil
  end

  it 'demo' do
    f(x, y) <= x + x * y + y
    expect(f(x, y)).to eq(x * (1 + y) + y)
    expect(f(a, 2)).to eq(3 * a + 2)
    expect(f(1, a + b)).to eq(1 + 2 * ( a + b ))
    expect(f(1, 2)).to eq(5)
    expect(d/dx(f(x, y))).to eq(1 + y)

    g(x) <= sin(x)
    expect(d/dx(g(x))).to eq(cos(x))
    expect(S(g(x), dx)[0, pi / 2]).to eq(1.0)
  end

  it 'API' do
    expect(Dydx::API.store_func([x, y], x + y, :tmp)).not_to eq(nil)
    expect(Dydx::API.eval_func([1,2], :tmp)).to eq(3.0)
    expect(Dydx::API.store_func([:x], (1 + 1/x) ** x, :tmp)).not_to eq(nil)
    expect(Dydx::API.eval_func([100000], :tmp)).to eq(2.7182682371744895)
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
dydx-0.2.7000001	spec/dydx_spec.rb
dydx-0.2.7000000	spec/dydx_spec.rb