node-gerber-parser/test/normalize-coord_test.js

Streaming Gerber/drill file parser

// test suite for normalize coordinate function
// input: a coordinate string from a gerber file, output: a number
'use strict'

var expect = require('chai').expect
var isNaN = require('lodash/isNaN')
var normalize = require('../lib/normalize-coord')

describe('normalize coordinate', function() {
  it('should return NaN for bad input', function() {
    expect(isNaN(normalize())).to.equal(true)
    expect(isNaN(normalize('0.1.2'))).to.equal(true)
    expect(isNaN(normalize('45', {zero: 'L'}))).to.equal(true)
    expect(isNaN(normalize('78', {zero: 'L', places: ['a', 2]}))).to.equal(true)
    expect(isNaN(normalize('90', {zero: 'L', places: [2, 'b']}))).to.equal(true)
    expect(isNaN(normalize('123', {zero: 'L', places: []}))).to.equal(true)
    expect(isNaN(normalize('456', {zero: 'foo', places: [2, 4]}))).to.equal(
      true
    )
  })

  it('should convert decimal numbers into proper coords', function() {
    expect(normalize('1.3')).to.equal(1.3)
    expect(normalize('-.343')).to.equal(-0.343)
    expect(normalize('+4.3478')).to.equal(4.3478)
    expect(normalize('10')).to.equal(10)
  })

  it('should convert trailing zero suppressed numbers into proper coords', function() {
    expect(normalize('13', {places: [2, 4], zero: 'T'})).to.equal(13)
    expect(normalize('-343', {places: [2, 3], zero: 'T'})).to.equal(-34.3)
    expect(normalize('+4347', {places: [2, 2], zero: 'T'})).to.equal(43.47)
    expect(normalize('1', {places: [2, 4], zero: 'T'})).to.equal(10)
  })

  it('should convert leading zero suppressed numbers into proper coords', function() {
    expect(normalize('13', {places: [2, 4], zero: 'L'})).to.equal(0.0013)
    expect(normalize('-343', {places: [2, 3], zero: 'L'})).to.equal(-0.343)
    expect(normalize('+4347', {places: [2, 2], zero: 'L'})).to.equal(43.47)
    expect(normalize('10', {places: [2, 4], zero: 'L'})).to.equal(0.001)
  })
})