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✨ Tests for point class

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This commit is contained in:
joostdecock 2018-07-12 12:53:49 +00:00
parent 11785baf1f
commit 57059dbbd2
9 changed files with 534 additions and 43 deletions
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8
index.ts
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@ -1,11 +1,11 @@
import pattern from './lib/pattern'
import point from './lib/point'
import { Pattern } from './lib/pattern'
import { Point } from './lib/point'
import bezier from 'bezier-js'
var Freesewing = {
version: '0.0.1',
pattern,
point,
pattern: Pattern,
point: Point,
bezier
}

2
lib/option.ts
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@ -1,5 +1,5 @@
import { PatternOption } from './types'
export default class Option {
export class Option {
id: string;
config: PatternOption;
val: number;

18
lib/part.ts
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@ -1,20 +1,24 @@
import Point from './point'
import { Point } from './point'
export default class Part {
id: string | number;
export class Part {
id: string;
render: boolean;
points: {
[index: string]: Point;
}
[propName: string]: any;
constructor(id: string | number) {
constructor(id: string) {
this.id = id;
this.render = (id.substr(0,1) === '_') ? false : true;
this.points = {};
return this;
}
newPoint(id: string | number, x: number, y: number) {
this.points[id] = new Point(x, y);
}
// purge = {
// points = function(prefix: string): void {}
// paths = function(prefix: string): void {}
// }
}

6
lib/pattern.ts
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@ -1,8 +1,8 @@
import { PatternConfig, PatternOption } from './types'
import Part from './part'
import Option from './option'
import { Part } from './part'
import { Option } from './option'
export default class Pattern {
export class Pattern {
config: PatternConfig;
parts: {[propName: string]: Part};
options: {[propName: string]: number};

90
lib/point.ts
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@ -1,24 +1,25 @@
import { round, rad2deg, deg2rad } from './utils';
const PRECISION = 2;
const RAD = 57.29577951308232;
// A poor man's rad2deg()
export default class Point {
export class Point {
x: number;
y: number;
constructor(x: number, y: number) {
this.x = +x.toFixed(PRECISION);
this.y = +y.toFixed(PRECISION);
this.x = round(x);
this.y = round(y);
return this;
}
/** Returns the distance between this point and that point */
distance(that: Point): number {
dist(that: Point): number {
let dx = this.x - that.x;
let dy = this.y - that.y;
return Math.sqrt(Math.pow(dx, 2) + Math.pow(dy,2));
return round(Math.sqrt(Math.pow(dx, 2) + Math.pow(dy,2)));
}
/** Returns slope of a line made by this point and that point */
@ -26,37 +27,76 @@ export default class Point {
return (that.y - this.y) / (that.x - this.x);
}
/** Returns the x-delta between this point and that point */
dx(that: Point): number {
return that.x - this.x;
}
/** Returns the y-delta between this point and that point */
dy(that: Point): number {
return that.y - this.y;
}
/** Returns the angle between this point and that point */
angle(that: Point): number {
let dx = this.x - that.x;
let dy = this.y - that.y;
let rad = Math.atan2(-1 * dy, dy);
let rad = Math.atan2(-1 * this.dy(that), this.dx(that));
while (rad < 0) rad += 2 * Math.PI;
// A poor man's rad2deg()
return rad * RAD;
return rad2deg(rad);
}
/** Rotate this point degrees around that point */
rotate(degrees: number, that: Point) {
let radius = this.distance(that);
/** Rotate this point deg around that point */
rotate(deg: number, that: Point): Point {
let radius = this.dist(that);
let angle = this.angle(that);
let x = that.x + radius * Math.cos((angle + degrees) / RAD) * -1;
let y = that.y + radius * Math.sin((angle + degrees) / RAD);
let x = that.x + radius * Math.cos(deg2rad(angle + deg)) * -1;
let y = that.y + radius * Math.sin(deg2rad(angle + deg));
return new Point(x, y);
}
/** Shifts this point distance in the degrees direction */
shift(degrees: number, distance: number): Point {
let p = this.copy();
p.x += distance;
return p.rotate(degrees, this);
}
/** returns an identical copy of this point */
copy(): Point {
return new Point(this.x, this.y);
}
/** checks whether this point is equal to that point */
equals(that: Point): boolean {
return (this.x === that.x && this.y === that.y) ? true : false;
}
/** Mirrors this point around X value of that point */
flipX(that: Point): Point
{
return new Point(that.x + this.dx(that), that.y);
}
/** Mirrors this point around Y value of that point */
flipY(that: Point): Point
{
return new Point(that.x, that.y + this.dy(that));
}
/** Shifts this point distance in the deg direction */
shift(deg: number, distance: number): Point {
let p = this.copy();
p.x += distance;
return p.rotate(deg, this);
}
/** Shifts this point distance in the direction of that point */
shiftTowards(that: Point, distance: number): Point {
return this.shift(this.angle(that), distance);
}
/** Shifts this point fraction of the distance towards that point */
shiftFractionTowards(that: Point, fraction: number): Point {
return this.shiftTowards(that, this.dist(that) * fraction);
}
/** Shifts this point distance beyond that point */
shiftOutwards(that: Point, distance: number): Point {
return this.shiftTowards(that, this.dist(that) + distance);
}
}

15
lib/utils.ts Normal file
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@ -0,0 +1,15 @@
/** Rounds a value to PRECISION */
export function round(value: number): number {
return Math.round(value * 1e2) / 1e2;
}
/** Radians to degrees */
export function rad2deg(radians: number): number {
return radians * 57.29577951308232;
}
/** Degrees to radians */
export function deg2rad(degrees: number): number {
return degrees / 57.29577951308232;
}

276
package-lock.json generated
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"arrify": "1.0.1",
"buffer-from": "1.1.0",
"diff": "3.5.0",
"make-error": "1.3.4",
"minimist": "1.2.0",
"mkdirp": "0.5.1",
"source-map-support": "0.5.6",
"yn": "2.0.0"
},
"dependencies": {
"minimist": {
"version": "1.2.0",
"resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
"integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
"dev": true
}
}
},
"type-detect": {
"version": "4.0.8",
"resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
"integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
"dev": true
},
"typescript": {
"version": "2.9.2",
"resolved": "https://registry.npmjs.org/typescript/-/typescript-2.9.2.tgz",
@ -1383,6 +1647,18 @@
"version": "0.1.3",
"resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.3.tgz",
"integrity": "sha512-nqHUnMXmBzT0w570r2JpJxfiSD1IzoI+HGVdd3aZ0yNi3ngvQ4jv1dtHt5VGxfI2yj5yqImPhOK4vmIh2xMbGg=="
},
"wrappy": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
"dev": true
},
"yn": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
"integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
"dev": true
}
}
}

11
package.json
View file

@ -5,7 +5,7 @@
"main": "dist/index.js",
"types": "dist/index.d.ts",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"test": "mocha -r ts-node/register tests/*.test.js",
"build": "tsc",
"build-watch": "tsc -w",
"run": "nodemon node dist/index.js",
@ -25,8 +25,13 @@
"bezier-js": "^2.2.13"
},
"devDependencies": {
"typescript": "^2.9.2",
"@types/bezier-js": "0.0.7",
"@types/node": "^10.5.2"
"@types/chai": "^4.1.4",
"@types/mocha": "^5.2.4",
"@types/node": "^10.5.2",
"chai": "^4.1.2",
"mocha": "^5.2.0",
"ts-node": "^7.0.0",
"typescript": "^2.9.2"
}
}

151
tests/point.test.js Normal file
View file

@ -0,0 +1,151 @@
var expect = require('chai').expect;
var Point = require('../dist/lib/point').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 limit point precision', () => {
let result = new Point(2.12345,4.98765);
expect(result.x).to.equal(2.12);
expect(result.y).to.equal(4.99);
});
it('should return distance', () => {
expect(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 X value', () => {
let result = new Point(2,4).flipX(new Point(-20, 4));
expect(result.x).to.equal(-42);
expect(result.y).to.equal(4);
});
it('should flip point around Y value', () => {
let result = new Point(2,4).flipY(new Point(2, -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(n.x).to.equal(0);
expect(n.y).to.equal(-10);
expect(e.x).to.equal(10);
expect(e.y).to.equal(0);
expect(s.x).to.equal(0);
expect(s.y).to.equal(10);
expect(w.x).to.equal(-10);
expect(w.y).to.equal(0);
let rand = origin.shift(-123, 456);
expect(rand.x).to.equal(-248.36);
expect(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(sn.x).to.equal(0);
expect(sn.y).to.equal(-123);
expect(se.x).to.equal(123);
expect(se.y).to.equal(0);
expect(ss.x).to.equal(0);
expect(ss.y).to.equal(123);
expect(sw.x).to.equal(-123);
expect(sw.y).to.equal(0);
expect(sw.shiftTowards(sn, 100).x).to.equal(-52.29);
expect(ss.shiftTowards(se, 200).y).to.equal(-18.42);
});
it('should shift a point a fraction 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.shiftFractionTowards(n, 1.5);
let se = origin.shiftFractionTowards(e, 1.5);
let ss = origin.shiftFractionTowards(s, 0.5);
let sw = origin.shiftFractionTowards(w, 2.5);
expect(sn.x).to.equal(0);
expect(sn.y).to.equal(-15);
expect(se.x).to.equal(15);
expect(se.y).to.equal(0);
expect(ss.x).to.equal(0);
expect(ss.y).to.equal(5);
expect(sw.x).to.equal(-25);
expect(sw.y).to.equal(0);
expect(sw.shiftFractionTowards(sn, 100).x).to.equal(2474.59);
expect(ss.shiftFractionTowards(se, 200).y).to.equal(-994.91);
});
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(sn.x).to.equal(0);
expect(sn.y).to.equal(-110);
expect(se.x).to.equal(110);
expect(se.y).to.equal(0);
expect(ss.x).to.equal(0);
expect(ss.y).to.equal(110);
expect(sw.x).to.equal(-110);
expect(sw.y).to.equal(0);
expect(sw.shiftOutwards(sn, 100).x).to.equal(70.71);
expect(ss.shiftOutwards(se, 200).y).to.equal(-141.42);
});