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Contents
describe "d3 - point scale" do
it "d3.scale_point" do
expect(D3.scale_point).to be_instance_of(D3::PointScale)
end
let(:d) { ("a".."f").to_a }
it "basics" do
scale = D3.scale_point.domain(d)
expect(d.map{|v| scale.(v).round(2)}).to eq([0, 0.2, 0.4, 0.6, 0.8, 1])
expect(scale.bandwidth).to eq(0)
expect(scale.step).to eq(0.2)
expect(scale.("z")).to eq(nil)
end
it "copy" do
scale = D3.scale_point.domain(d)
sc = scale.copy.range([10,20])
expect(scale.domain).to eq(d)
expect(sc.domain).to eq(d)
expect(scale.range).to eq([0,1])
expect(sc.range).to eq([10,20])
end
it "padding" do
scale = D3.scale_point.domain(d).range([0,100])
expect(scale.padding).to eq(0)
scale.padding(0.5)
expect(scale.padding).to eq(0.5)
expect(d.map{|v| scale.(v).round(2)}).to eq([8.33, 25, 41.67, 58.33, 75, 91.67])
end
it "align" do
scale = D3.scale_point.domain(d).range([0,100])
scale.padding(0.5)
expect(scale.align).to eq(0.5)
expect(d.map{|v| scale.(v).round(2)}).to eq([8.33, 25, 41.67, 58.33, 75, 91.67])
scale.align(0)
expect(scale.align).to eq(0)
expect(d.map{|v| scale.(v).round(2)}).to eq([0, 16.67, 33.33, 50, 66.67, 83.33])
scale.align(1)
expect(scale.align).to eq(1)
expect(d.map{|v| scale.(v).round(2)}).to eq([16.67, 33.33, 50, 66.67, 83.33, 100])
end
it "round" do
scale = D3.scale_point.domain(d).range([0,100])
expect(scale.round).to eq(false)
scale.range_round([0,1000]).padding(1)
expect(scale.range).to eq([0,1000])
expect(scale.round).to eq(true)
# This rounding is somewhat weird
expect(d.map{|v| scale.(v)}).to eq([145, 287, 429, 571, 713, 855])
end
end
Version data entries
8 entries across 8 versions & 2 rubygems