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KochSnowflake.test.js
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30 lines (25 loc) · 730 Bytes
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import { iterate, Vector2 } from '../KochSnowflake'
describe('KochSnowflake', () => {
it('should produce the correctly-transformed vectors', () => {
expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[0]).toEqual({
x: 0,
y: 0
})
expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[1]).toEqual({
x: 1 / 3,
y: 0
})
expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[2]).toEqual({
x: 1 / 2,
y: Math.sin(Math.PI / 3) / 3
})
expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[3]).toEqual({
x: 2 / 3,
y: 0
})
expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[4]).toEqual({
x: 1,
y: 0
})
})
})