✨ Tests for point class

index.ts

@@ -1,11 +1,11 @@
-import pattern from './lib/pattern'
+import { Pattern } from './lib/pattern'
-import point from './lib/point'
+import { Point } from './lib/point'
 import bezier from 'bezier-js'
 
 var Freesewing = {
     version: '0.0.1',
-    pattern,
+    pattern: Pattern,
-    point,
+    point: Point,
     bezier
 }
 

lib/option.ts

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

lib/part.ts

@@ -1,20 +1,24 @@
-import Point from './point'
+import { Point } from './point'
 
-export default class Part {
+export class Part {
-  id: string | number;
+  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 {}
+//  }
 }

lib/pattern.ts

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

lib/point.ts

@@ -1,24 +1,25 @@
+import { round, rad2deg, deg2rad } from './utils';
+
 const PRECISION = 2;
-const RAD = 57.29577951308232;
+// A poor man's rad2deg()
 
-
+export class Point {
-export default class Point {
   x: number;
   y: number;
 
   constructor(x: number, y: number) {
-    this.x = +x.toFixed(PRECISION);
+    this.x = round(x);
-    this.y = +y.toFixed(PRECISION);
+    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 rad = Math.atan2(-1 * this.dy(that), this.dx(that));
-    let dy = this.y - that.y;
-    let rad = Math.atan2(-1 * dy, dy);
     while (rad < 0) rad += 2 * Math.PI;
 
-    // A poor man's rad2deg()
+    return rad2deg(rad);
-    return rad * RAD;
   }
 
-  /** Rotate this point degrees around that point */
+  /** Rotate this point deg around that point */
-  rotate(degrees: number, that: Point) {
+  rotate(deg: number, that: Point): Point {
-    let radius = this.distance(that);
+    let radius = this.dist(that);
     let angle = this.angle(that);
-    let x = that.x + radius * Math.cos((angle + degrees) / RAD) * -1;
+    let x = that.x + radius * Math.cos(deg2rad(angle + deg)) * -1;
-    let y = that.y + radius * Math.sin((angle + degrees) / RAD);
+    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);
+  }
 }

lib/utils.ts

@@ -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;
+}
+

package-lock.json

@@ -10,6 +10,18 @@
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+    },
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@@ -132,6 +156,38 @@
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       }
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+        "get-func-name": "2.0.0",
+        "pathval": "1.1.0",
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@@ -191,6 +253,15 @@
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@@ -786,6 +875,26 @@
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@@ -955,6 +1092,12 @@
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@@ -1011,6 +1154,57 @@
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+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+      "dev": true
+    },
+    "source-map-support": {
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.6.tgz",
+      "integrity": "sha512-N4KXEz7jcKqPf2b2vZF11lQIz9W5ZMuUcIOGj243lduidkf2fjkVKJS9vNxVWn3u/uxX38AcE8U9nnH9FPcq+g==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "1.1.0",
+        "source-map": "0.6.1"
+      }
+    },
     "split": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/split/-/split-0.3.3.tgz",
@@ -1329,11 +1554,50 @@
         "safe-buffer": "5.1.2"
       }
     },
+    "supports-color": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
+      "integrity": "sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==",
+      "dev": true,
+      "requires": {
+        "has-flag": "3.0.0"
+      }
+    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
     },
+    "ts-node": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-7.0.0.tgz",
+      "integrity": "sha512-klJsfswHP0FuOLsvBZ/zzCfUvakOSSxds78mVeK7I+qP76YWtxf16hEZsp3U+b0kIo82R5UatGFeblYMqabb2Q==",
+      "dev": true,
+      "requires": {
+        "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
     }
   }
 }

package.json

@@ -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"
   }
 }

tests/point.test.js

@@ -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);
+});
+
+