freesewing/packages/core/tests/point.test.mjs

import { expect } from 'chai'
import { round, Point } from '../src/index.mjs'

describe('Point', () => {
  it('Should return point object', () => {
    let result = new Point(2, 4)
    expect(result).to.be.a('object')
    expect(result.x).to.equal(2)
    expect(result.y).to.equal(4)
  })

  it('Should not limit point precision', () => {
    let result = new Point(2.12345, 4.98765)
    expect(result.x).to.equal(2.12345)
    expect(result.y).to.equal(4.98765)
  })

  it('Should return distance', () => {
    expect(round(new Point(2, 4).dist(new Point(-123, -32423)))).to.equal(32427.24)
  })

  it('Should return slope', () => {
    let from = new Point(0, 0)
    expect(from.slope(new Point(0, -10))).to.equal(-Infinity)
    expect(from.slope(new Point(10, 0))).to.equal(0)
    expect(from.slope(new Point(0, 10))).to.equal(Infinity)
    expect(from.slope(new Point(-10, 0))).to.equal(-0)
    expect(from.slope(new Point(10, 10))).to.equal(1)
    expect(from.slope(new Point(-10, 5))).to.equal(-0.5)
  })

  it('Should return angle', () => {
    let from = new Point(0, 0)
    expect(from.angle(new Point(10, 0))).to.equal(0)
    expect(from.angle(new Point(-20, 0))).to.equal(180)
    expect(from.angle(new Point(0, -10))).to.equal(90)
    expect(from.angle(new Point(0, 10))).to.equal(270)
    expect(from.angle(new Point(10, -10))).to.equal(45)
    expect(from.angle(new Point(10, 10))).to.equal(315)
  })

  it('Should copy a point', () => {
    let result = new Point(2, 4).copy()
    expect(result.x).to.equal(2)
    expect(result.y).to.equal(4)
  })

  it('Should check points for equality', () => {
    let a = new Point(-123, 456)
    let b = new Point(-123, 456)
    expect(a).to.deep.equal(b)
  })

  it('Should flip point around unset X value', () => {
    let result = new Point(2, 4).flipX()
    expect(result.x).to.equal(-2)
    expect(result.y).to.equal(4)
  })

  it('Should flip point around X value that is zero', () => {
    let flip = new Point(0, 0)
    let result = new Point(2, 4).flipX(flip)
    expect(result.x).to.equal(-2)
    expect(result.y).to.equal(4)
  })

  it('Should flip point around X value', () => {
    let result = new Point(2, 4).flipX(new Point(-20, 19))
    expect(result.x).to.equal(-42)
    expect(result.y).to.equal(4)
  })

  it('Should flip point around unset Y value', () => {
    let result = new Point(2, 4).flipY()
    expect(result.x).to.equal(2)
    expect(result.y).to.equal(-4)
  })

  it('Should flip point around Y value that is zero', () => {
    let flip = new Point(0, 0)
    let result = new Point(2, 4).flipY(flip)
    expect(result.x).to.equal(2)
    expect(result.y).to.equal(-4)
  })

  it('Should flip point around Y value', () => {
    let result = new Point(2, 4).flipY(new Point(12, -14))
    expect(result.x).to.equal(2)
    expect(result.y).to.equal(-32)
  })

  it('Should shift a point', () => {
    let origin = new Point(0, 0)
    let n = origin.shift(90, 10)
    let e = origin.shift(0, 10)
    let s = origin.shift(270, 10)
    let w = origin.shift(180, 10)
    expect(round(n.x)).to.equal(0)
    expect(round(n.y)).to.equal(-10)
    expect(round(e.x)).to.equal(10)
    expect(round(e.y)).to.equal(0)
    expect(round(s.x)).to.equal(0)
    expect(round(s.y)).to.equal(10)
    expect(round(w.x)).to.equal(-10)
    expect(round(w.y)).to.equal(0)
    let rand = origin.shift(-123, 456)
    expect(round(rand.x)).to.equal(-248.36)
    expect(round(rand.y)).to.equal(382.43)
  })

  it('Should shift a point towards another', () => {
    let origin = new Point(0, 0)
    let n = new Point(0, -10)
    let e = new Point(10, 0)
    let s = new Point(0, 10)
    let w = new Point(-10, 0)
    let sn = origin.shiftTowards(n, 123)
    let se = origin.shiftTowards(e, 123)
    let ss = origin.shiftTowards(s, 123)
    let sw = origin.shiftTowards(w, 123)
    expect(round(sn.x)).to.equal(0)
    expect(round(sn.y)).to.equal(-123)
    expect(round(se.x)).to.equal(123)
    expect(round(se.y)).to.equal(0)
    expect(round(ss.x)).to.equal(0)
    expect(round(ss.y)).to.equal(123)
    expect(round(sw.x)).to.equal(-123)
    expect(round(sw.y)).to.equal(0)
    expect(round(sw.shiftTowards(sn, 100).x)).to.equal(-52.29)
    expect(round(ss.shiftTowards(se, 200).y)).to.equal(-18.42)
  })

  describe('shiftFractionTowards', () => {
    it('Should shift a point a fraction towards another', () => {
      let origin = new Point(0, 0)
      let s = new Point(0, 10)
      let ss = origin.shiftFractionTowards(s, 0.5)
      expect(round(ss.x)).to.equal(0)
      expect(round(ss.y)).to.equal(5)
    })

    it('Should shift a point a fraction beyond another if the fraction is > 1', () => {
      let origin = new Point(0, 0)
      let n = new Point(0, -10)
      let sn = origin.shiftFractionTowards(n, 1.5)
      expect(round(sn.x)).to.equal(0)
      expect(round(sn.y)).to.equal(-15)
    })

    it('Should shift a point a fraction away from another if the fraction is < 0', () => {
      let origin = new Point(0, 0)
      let n = new Point(0, -10)
      let sn = origin.shiftFractionTowards(n, -0.5)
      expect(round(sn.x)).to.equal(0)
      expect(round(sn.y)).to.equal(5)
    })
  })

  it('Should shift a point beyond another', () => {
    let origin = new Point(0, 0)
    let n = new Point(0, -10)
    let e = new Point(10, 0)
    let s = new Point(0, 10)
    let w = new Point(-10, 0)
    let sn = origin.shiftOutwards(n, 100)
    let se = origin.shiftOutwards(e, 100)
    let ss = origin.shiftOutwards(s, 100)
    let sw = origin.shiftOutwards(w, 100)
    expect(round(sn.x)).to.equal(0)
    expect(round(sn.y)).to.equal(-110)
    expect(round(se.x)).to.equal(110)
    expect(round(se.y)).to.equal(0)
    expect(round(ss.x)).to.equal(0)
    expect(round(ss.y)).to.equal(110)
    expect(round(sw.x)).to.equal(-110)
    expect(round(sw.y)).to.equal(0)
    expect(round(sw.shiftOutwards(sn, 100).x)).to.equal(70.71)
    expect(round(ss.shiftOutwards(se, 200).y)).to.equal(-141.42)
  })

  it('Should rotate a point around another', () => {
    let sun = new Point(0, 0)
    let moon = new Point(10, 0)
    let a = moon.rotate(90, sun)
    expect(round(a.x)).to.equal(0)
    expect(round(a.y)).to.equal(-10)
    let b = moon.rotate(-90, sun)
    expect(round(b.x)).to.equal(0)
    expect(round(b.y)).to.equal(10)
    let c = moon.rotate(180, sun)
    expect(round(c.x)).to.equal(-10)
    expect(round(c.y)).to.equal(0)
    let sun2 = new Point(222, 44)
    let moon2 = new Point(212, 41)
    let d = moon2.rotate(90, sun2)
    expect(round(d.x)).to.equal(219)
    expect(round(d.y)).to.equal(54)
  })

  it('Should set an attribute', () => {
    let p = new Point(0, 0).attr('class', 'test')
    expect(p.attributes.get('class')).to.equal('test')
    p.attr('class', 'more')
    expect(p.attributes.get('class')).to.equal('test more')
    p.attr('class', 'less', true)
    expect(p.attributes.get('class')).to.equal('less')
  })

  it('Should detect points in the same location', () => {
    let p1 = new Point(123, 456)
    let p2 = new Point(123, 456)
    expect(p1.sitsOn(p2)).to.equal(true)
    p2.x = 122.99
    expect(p1.sitsOn(p2)).to.equal(false)
  })

  it('Should clone a point', () => {
    let p1 = new Point(123, 456).attr('class', 'something')
    p1.attr('class', 'else')
    let p2 = p1.clone()
    expect(p2.sitsOn(p1)).to.equal(true)
    expect(p2.attributes.get('class')).to.equal('something else')
  })

  it('Should translate a point', () => {
    let p1 = new Point(10, 20)
    let p2 = p1.translate(15, 50)
    expect(p2.x).to.equal(25)
    expect(p2.y).to.equal(70)
  })

  it('Should add log methods to a point', () => {
    const log = () => 'hello'
    const p1 = new Point(10, 20).__withLog(log)
    expect(p1.log()).to.equal('hello')
  })

  it('Should log a warning on invalid point coordinates', () => {
    const invalid = { x: false, y: false }
    const logX = { warn: () => (invalid.x = true) }
    const logY = { warn: () => (invalid.y = true) }
    const p1 = new Point('a', 10).__withLog(logX)
    const p2 = new Point(20, 'b').__withLog(logY)
    expect(invalid.x).to.equal(false)
    expect(invalid.y).to.equal(false)
    p1.__check()
    p2.__check()
    expect(invalid.x).to.equal(true)
    expect(invalid.y).to.equal(true)
  })

  it('Should log a warning if rotation is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    const p2 = new Point(20, 20).__withLog(log)
    expect(invalid).to.equal(false)
    p1.rotate('a', p2)
    expect(invalid).to.equal(true)
  })

  it('Should log a warning if rotating around what is not a point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.rotate(45, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it("Should log a warning when flipX'ing around what is not a point", () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.flipX('a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it("Should log a warning when flipY'ing around what is not a point", () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.flipY('a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting with a distance that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shift(0, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting with an angle that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shift('a', 12)
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting towards with a distance that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    const p2 = new Point(20, 20).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftTowards(p2, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting towards with a target that is not a point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftTowards('a', 10)
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting fraction towards with a distance that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    const p2 = new Point(20, 20).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftFractionTowards(p2, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting a fraction towards with a target that is not a point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftFractionTowards('a', 0.1)
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting outowards with a distance that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    const p2 = new Point(20, 20).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftOutwards(p2, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when shifting a outowards with a target that is not a point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.shiftOutwards('a', 0.1)
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when translating with an X-delta that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.translate('a', 10)
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when translating with an Y-delta that is not a number', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.translate(10, 'a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when sitsOn receives a non-point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.sitsOn('a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should log a warning when sitsRoughlyOn receives a non-point', () => {
    let invalid = false
    const log = { warn: () => (invalid = true) }
    const p1 = new Point(10, 10).__withLog(log)
    expect(invalid).to.equal(false)
    try {
      p1.sitsRoughlyOn('a')
    } catch (err) {
      expect('' + err).to.contain('check is not a function')
    }
    expect(invalid).to.equal(true)
  })

  it('Should add the data-text property in a chainable way', () => {
    const p1 = new Point(10, 10).addText('hello').addText('world')
    expect(p1.attributes.get('data-text')).to.equal('hello world')
  })

  it('Should set the data-text property in a chainable way', () => {
    const p1 = new Point(10, 10).setText('hello')
    expect(p1.attributes.get('data-text')).to.equal('hello')
  })

  it('Should set the data-text-class property in a chainable way', () => {
    const p1 = new Point(10, 10).addText('hello', 'fabric').addText('world', 'lining')
    expect(p1.attributes.get('data-text')).to.equal('hello world')
    expect(p1.attributes.get('data-text-class')).to.equal('fabric lining')
  })

  it('Should set the data-text-class property in a chainable way', () => {
    const p1 = new Point(10, 10).setText('hello', 'fabric')
    expect(p1.attributes.get('data-text')).to.equal('hello')
    expect(p1.attributes.get('data-text-class')).to.equal('fabric')
  })

  it('Should add the data-circle property in a chainable way', () => {
    const p1 = new Point(10, 10).addCircle('20').addCircle('30').addCircle('40')
    const radius = p1.attributes.getAsArray('data-circle')
    expect(radius.length).to.equal(3)
    expect(radius[0]).to.equal('20')
    expect(radius[1]).to.equal('30')
    expect(radius[2]).to.equal('40')
  })

  it('Should set the data-circle property in a chainable way', () => {
    const p1 = new Point(10, 10).setCircle('20')
    expect(p1.attributes.get('data-circle')).to.equal('20')
  })

  it('Should add the data-circle-class property in a chainable way', () => {
    const p1 = new Point(10, 10)
      .addCircle('20', 'fabric')
      .addCircle('30', 'lining')
      .addCircle('40', 'interfacing')
    const radius = p1.attributes.getAsArray('data-circle')
    const classes = p1.attributes.getAsArray('data-circle-class')
    expect(radius.length).to.equal(3)
    expect(radius[0]).to.equal('20')
    expect(radius[1]).to.equal('30')
    expect(radius[2]).to.equal('40')
    expect(classes.length).to.equal(3)
    expect(classes[0]).to.equal('fabric')
    expect(classes[1]).to.equal('lining')
    expect(classes[2]).to.equal('interfacing')
  })

  it('Should set the data-circle-class property in a chainable way', () => {
    const p1 = new Point(10, 10).setCircle('20', 'fabric')
    expect(p1.attributes.get('data-circle')).to.equal('20')
    expect(p1.attributes.get('data-circle-class')).to.equal('fabric')
  })
})