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21 lines
685 B
JavaScript
21 lines
685 B
JavaScript
import { iterate, Vector2 } from '../KochSnowflake'
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describe('KochSnowflake', () => {
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it('should produce the correctly-transformed vectors', () => {
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expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[0])
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.toEqual({ x: 0, y: 0 })
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expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[1])
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.toEqual({ x: 1 / 3, y: 0 })
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expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[2])
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.toEqual({ x: 1 / 2, y: Math.sin(Math.PI / 3) / 3 })
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expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[3])
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.toEqual({ x: 2 / 3, y: 0 })
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expect(iterate([new Vector2(0, 0), new Vector2(1, 0)], 1)[4])
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.toEqual({ x: 1, y: 0 })
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})
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})
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