api_curve.test.ts

import { assert } from 'chai'
import * as gdal from 'gdal-async'

describe('gdal.CompoundCurve', () => {
  afterEach(() => void global.gc!())

  it('should be instantiable', () => {
    new gdal.CompoundCurve()
  })
  it('should inherit from Geometry', () => {
    assert.instanceOf(new gdal.CompoundCurve(), gdal.CompoundCurve)
    assert.instanceOf(new gdal.CompoundCurve(), gdal.Geometry)
  })
  describe('instance', () => {
    let compoundcurve: gdal.CompoundCurve
    before(() => {
      try {
        compoundcurve = gdal.Geometry.fromWKT('COMPOUNDCURVE (CIRCULARSTRING (692012.37315768 594722.610031277,692057.127042054 594649.528941062,692067.186040178 594564.425636366),(692067.186040178 594564.425636366,692026.997800346 594156.751911029),CIRCULARSTRING (692026.997800346 594156.751911029,692061.574244064 594070.897749602,692151.782327678 594050.18617928))') as gdal.CompoundCurve
      } catch (_e) {
        // ignore
      }
    })
    it('should be parsed from WKT', () => {
      assert.instanceOf(compoundcurve, gdal.CompoundCurve)
      assert.equal(compoundcurve.curves.count(), 3)
      assert.instanceOf(compoundcurve.curves.get(0), gdal.CircularString)
    })
    it('should support forEach', () => {
      let i = 0
      compoundcurve.curves.forEach((curve) => {
        assert.instanceOf(curve, gdal.SimpleCurve)
        i++
      })
      assert.equal(i, 3)
    })
    it('should support map', () => {
      const curves = compoundcurve.curves.map((curve) => curve)
      assert.isArray(curves)
      assert.equal(curves.length, 3)
    })
    it('should have an iterator', () => {
      let i = 0
      for (const curve of compoundcurve.curves) {
        assert.instanceOf(curve, gdal.SimpleCurve)
        i++
      }
      assert.equal(i, 3)
    })
    describe('adding curves', () => {
      const makeCurves = () => {
        const arc = new gdal.CircularString()
        arc.points.add(-5, 0)
        arc.points.add(0, 2.5)
        arc.points.add(5, 0)

        const line = new gdal.LineString()
        line.points.add(5, 0)
        line.points.add(10, 10)
        line.points.add(10, 20)

        return { arc, line }
      }
      it('should reject non-contiguous curves', () => {
        const { arc, line } = makeCurves()
        assert.throws(() => {
          compoundcurve.curves.add(arc)
          compoundcurve.curves.add(line)
        }, /contiguous/)
      })
      it('should support adding curves', () => {
        const newcompound = new gdal.CompoundCurve()
        const { arc, line } = makeCurves()

        newcompound.curves.add(arc)
        newcompound.curves.add(line)
        assert.equal(newcompound.curves.count(), 2)
        assert.equal(newcompound.curves.get(0).toWKT(), arc.toWKT())
        assert.equal(newcompound.curves.get(1).toWKT(), line.toWKT())
      })
      it('should support adding multiple curves', () => {
        const newcompound = new gdal.CompoundCurve()
        const { arc, line } = makeCurves()

        newcompound.curves.add([ arc, line ])
        assert.equal(newcompound.curves.count(), 2)
        assert.equal(newcompound.curves.get(0).toWKT(), arc.toWKT())
        assert.equal(newcompound.curves.get(1).toWKT(), line.toWKT())
      })
    })
  })
})

describe('gdal.MultiCurve', () => {
  afterEach(() => void global.gc!())

  it('should be instantiable', () => {
    new gdal.MultiCurve()
  })
  it('should inherit from GeometryCollection', () => {
    assert.instanceOf(new gdal.MultiCurve(), gdal.MultiCurve)
    assert.instanceOf(new gdal.MultiCurve(), gdal.GeometryCollection)
    assert.instanceOf(new gdal.MultiCurve(), gdal.Geometry)
  })
  describe('instance', () => {
    let multicurve
    it('should be parsed from WKT', () => {
      multicurve = gdal.Geometry.fromWKT('MULTICURVE (COMPOUNDCURVE (CIRCULARSTRING (692012.37315768 594722.610031277,692057.127042054 594649.528941062,692067.186040178 594564.425636366),(692067.186040178 594564.425636366,692026.997800346 594156.751911029),CIRCULARSTRING (692026.997800346 594156.751911029,692061.574244064 594070.897749602,692151.782327678 594050.18617928)))') as gdal.MultiCurve
      assert.instanceOf(multicurve, gdal.MultiCurve)
      assert.equal(multicurve.children.count(), 1)
      assert.instanceOf(multicurve.children.get(0), gdal.CompoundCurve)
    })
  })
})