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require 'ruby2d'
RSpec.describe Ruby2D::Triangle do
describe "#new" do
it "creates a white triangle by default" do
triangle = Triangle.new
expect(triangle.color).to be_a(Ruby2D::Color)
expect(triangle.color.r).to eq(1)
expect(triangle.color.g).to eq(1)
expect(triangle.color.b).to eq(1)
expect(triangle.color.a).to eq(1)
end
it "creates a new triangle with one color via string" do
triangle = Triangle.new(color: 'black')
expect(triangle.color).to be_a(Ruby2D::Color)
end
it "creates a new triangle with one color via array of numbers" do
triangle = Triangle.new(color: [0.1, 0.3, 0.5, 0.7])
expect(triangle.color).to be_a(Ruby2D::Color)
end
it "creates a new triangle with 3 colors via array of 3 strings" do
triangle = Triangle.new(color: ['red', 'green', 'blue'])
expect(triangle.color).to be_a(Ruby2D::Color::Set)
end
it "creates a new triangle with 3 colors via array of 3 arrays of arrays of numbers" do
triangle = Triangle.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]
]
)
expect(triangle.color).to be_a(Ruby2D::Color::Set)
end
it "throws an error when array of 2 strings is passed" do
expect do
Triangle.new(color: ['red', 'green'])
end.to raise_error("Triangles require 3 colors, one for each vertex. 2 were given.")
end
it "throws an error when array of 4 strings is passed" do
expect do
Triangle.new(color: ['red', 'green', 'blue', 'fuchsia'])
end.to raise_error("Triangles require 3 colors, one for each vertex. 4 were given.")
end
end
describe "#contains?" do
triangle = Triangle.new(
x1: 0, y1: 0,
x2: 0, y2: 100,
x3: 100, y3: 0
)
it "returns true if point is inside the triangle" do
expect(triangle.contains?( 0, 0)).to be true
expect(triangle.contains?(25, 25)).to be true
end
it "returns false if point is outside the triangle" do
expect(triangle.contains?( 25, -25)).to be false
expect(triangle.contains?(-25, 25)).to be false
expect(triangle.contains?(100, 1)).to be false
end
end
end
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