Contents

require 'spec_helper.rb'

describe Daru::Vector, 'plotting vector with gruff' do
  let(:dv) { Daru::Vector.new [1, 2, 3] }
  before { Daru.plotting_library = :gruff }

  context 'line' do
    let(:plot) { instance_double 'Gruff::Line' }
    before { allow(Gruff::Line).to receive(:new).and_return(plot) }
    
    it 'plots line graph without block' do
      expect(plot).to receive(:labels=)
      expect(plot).to receive(:data)
      dv.plot type: :line
    end
    
    it 'plots line graph with block' do
      expect(plot).to receive :labels=
      expect(plot).to receive :data
      expect(plot).to receive :title=
      dv.plot(type: :line) { |p| p.title = 'hello' }
    end
  end
  
  context 'bar' do
    let(:plot) { instance_double 'Gruff::Bar' }
    before { allow(Gruff::Bar).to receive(:new).and_return(plot) }
    
    it 'plots bar graph' do
      expect(plot).to receive :labels=
      expect(plot).to receive :data
      dv.plot type: :bar
    end
  end
  
  context 'pie' do
    let(:plot) { instance_double 'Gruff::Pie' }
    before { allow(Gruff::Pie).to receive(:new).and_return(plot) }
    
    it 'plots pie graph' do
      expect(plot).to receive(:data).exactly(3).times
      dv.plot type: :pie
    end
  end
  
  context 'scatter' do
    let(:plot) { instance_double 'Gruff::Scatter' }
    before { allow(Gruff::Scatter).to receive(:new).and_return(plot) }

    it 'plots scatter graph' do
      expect(plot).to receive :data
      dv.plot type: :scatter
    end
  end
  
  context 'sidebar' do
    let(:plot) { instance_double 'Gruff::SideBar' }
    before { allow(Gruff::SideBar).to receive(:new).and_return(plot) }

    it 'plots sidebar' do
      expect(plot).to receive :labels=
      expect(plot).to receive(:data).exactly(3).times
      dv.plot type: :sidebar
    end
  end
  
  context 'invalid type' do
    it { expect { dv.plot type: :lol }.to raise_error ArgumentError }
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
daru-0.1.5	spec/plotting/gruff/vector_spec.rb