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require 'ruby2d'
RSpec.describe Ruby2D::Line do
describe "#new" do
it "creates a white line by default" do
line = Line.new
expect(line.color).to be_a(Ruby2D::Color)
expect(line.color.r).to eq(1)
expect(line.color.g).to eq(1)
expect(line.color.b).to eq(1)
expect(line.color.a).to eq(1)
end
it "creates a line with options" do
line = Line.new(
x1: 10, y1: 20, x2: 30, y2: 40, z: 50, width: 60,
color: 'gray', opacity: 0.5
)
expect(line.x1).to eq(10)
expect(line.y1).to eq(20)
expect(line.x2).to eq(30)
expect(line.y2).to eq(40)
expect(line.z).to eq(50)
expect(line.width).to eq(60)
expect(line.length).to be_within(0.0001).of(28.2843)
expect(line.color.r).to eq(2/3.0)
expect(line.opacity).to eq(0.5)
end
it "creates a new line with one color via string" do
line = Line.new(color: 'red')
expect(line.color).to be_a(Ruby2D::Color)
end
it "creates a new line with one color via array of numbers" do
line = Quad.new(color: [0.1, 0.3, 0.5, 0.7])
expect(line.color).to be_a(Ruby2D::Color)
end
it "creates a new line with 4 colors via array of 4 strings" do
line = Line.new(color: ['red', 'green', 'blue', 'black'])
expect(line.color).to be_a(Ruby2D::Color::Set)
end
it "creates a new line with 4 colors via array of 4 arrays of arrays of numbers" do
line = Line.new(
color: [
[0.1, 0.3, 0.5, 0.7],
[0.2, 0.4, 0.6, 0.8],
[0.3, 0.5, 0.7, 0.9],
[0.4, 0.6, 0.8, 1.0]
]
)
expect(line.color).to be_a(Ruby2D::Color::Set)
end
it "throws an error when array of 3 strings is passed" do
expect do
Line.new(color: ['red', 'green', 'blue'])
end.to raise_error("`Ruby2D::Line` requires 4 colors, one for each vertex. 3 were given.")
end
it "throws an error when array of 5 strings is passed" do
expect do
Line.new(color: ['red', 'green', 'blue', 'black', 'fuchsia'])
end.to raise_error("`Ruby2D::Line` requires 4 colors, one for each vertex. 5 were given.")
end
end
describe "attributes" do
it "can be set and read" do
line = Line.new
line.x1 = 10
line.y1 = 20
line.x2 = 30
line.y2 = 40
line.z = 50
line.width = 60
line.color = 'gray'
line.opacity = 0.5
expect(line.x1).to eq(10)
expect(line.y1).to eq(20)
expect(line.x2).to eq(30)
expect(line.y2).to eq(40)
expect(line.z).to eq(50)
expect(line.width).to eq(60)
expect(line.length).to be_within(0.0001).of(28.2843)
expect(line.color.r).to eq(2/3.0)
expect(line.opacity).to eq(0.5)
end
end
# TODO: This test should be more precise, like `Renderable#contains?`
describe "#contains?" do
line = Line.new(x1: 0, y1: 0, x2: 100, y2: 100)
it "returns true if point is inside the line" do
expect(line.contains?( 0, 1)).to be true
expect(line.contains?(100, 100)).to be true
end
it "returns false if point is outside the line" do
expect(line.contains?( 0, 2)).to be false
expect(line.contains?(101, 0)).to be false
end
end
end
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