Point

mlibrary · Dec 9, 2019 · ce172af · ce172af
1 parent 2b4c2f4
commit ce172af
Showing 1 changed file with 90 additions and 6 deletions.
diff --git a/spec/geometry/point.spec.js b/spec/geometry/point.spec.js
@@ -1,16 +1,92 @@
 import { Point, toPoint } from "../../src/geometry/Point";
 
 describe('Point', () => {
-  let x = 1.1;
-  let y = 1.1;
+  let x = 1.5;
+  let y = 1.5;
+  let p = new Point(x, y);
+
+  describe('#clone', () => {
+    expect(p.clone()).not.toBe(p);
+    expect(p.clone()).toEqual(p);
+  });
+
+  describe('#add', () => {
+    expect(p.add(p)).not.toBe(p);
+    expect(p.add(p)).toEqual(new Point(2.0 * x, 2.0 * y));
+  });
+
+  describe('#subtract', () => {
+    expect(p.subtract(p)).not.toBe(p);
+    expect(p.subtract(p)).toEqual(new Point(0.0, 0.0));
+  });
+
+  describe('#divideBy', () => {
+    expect(p.divideBy(2.0)).not.toBe(p);
+    expect(p.divideBy(2.0)).toEqual(new Point(x / 2.0, y / 2.0));
+  });
+
+  describe('#multiplyBy', () => {
+    expect(p.multiplyBy(2.0)).not.toBe(p);
+    expect(p.multiplyBy(2.0)).toEqual(new Point(2.0 * x, 2.0 * y));
+  });
+
+  describe('#scaleBy', () => {
+    let s = new Point(2.0, 0.5);
+
+    expect(p.scaleBy(s)).not.toBe(p);
+    expect(p.scaleBy(s)).toEqual(new Point(2.0 * x, 0.5 * y));
+  });
+
+  describe('#unscaleBy', () => {
+    let s = new Point(2.0, 0.5);
+
+    expect(p.unscaleBy(s)).not.toBe(p);
+    expect(p.unscaleBy(s)).toEqual(new Point(x / 2.0, y / 0.5));
+  });
+
+  describe('#round', () => {
+    expect(p.round()).not.toBe(p);
+    expect(p.round()).toEqual(new Point(x, y, true));
+  });
+
+  describe('#floor', () => {
+    expect(p.floor()).not.toBe(p);
+    expect(p.floor()).toEqual(new Point(Math.floor(x), Math.floor(y)));
+  });
+
+  describe('#ceil', () => {
+    expect(p.ceil()).not.toBe(p);
+    expect(p.ceil()).toEqual(new Point(Math.ceil(x), Math.ceil(y)));
+  });
+
+  describe('#distanceTo', () => {
+    expect(p.distanceTo(p.clone())).toEqual(0.0);
+    expect(p.distanceTo(new Point(0.0, 0.0))).toEqual(Math.sqrt(x * x + y * y));
+    expect(p.distanceTo(p.multiplyBy(2.0))).toEqual(Math.sqrt(x * x + y * y));
+  });
+
+  describe('#equals', () => {
+    expect(p.equals(p.clone())).toBeTrue();
+    expect(p.equals(p.multiplyBy(2.0))).toBeFalse();
+  });
+
+  describe('#contains', () => {
+    expect(p.contains(p.clone())).toBeTrue();
+    expect(p.contains(p.multiplyBy(2.0))).toBeFalse();
+    expect(p.contains(p.divideBy(2.0))).toBeTrue();
+  });
+
+  describe('#toString', () => {
+    expect(p.toString()).toEqual("Point(1.5, 1.5)");
+  });
 
   describe('toPoint', () => {
     it('instance of Point', () => {
       let point = new Point(x, y);
       let p = toPoint(point);
 
       expect(p instanceof Point).toBeTrue();
-      expect(p).toEqual(point);
+      expect(p).toBe(point);
     });
 
     it('two element array', () => {
@@ -39,23 +115,31 @@ describe('Point', () => {
     });
 
     it('x, y', () => {
-      let p = new Point(x, y);
+      let p = toPoint(x, y);
 
       expect(p instanceof Point).toBeTrue();
       expect(p.x).toStrictEqual(x);
       expect(p.y).toStrictEqual(y);
     });
 
     it('x, y, true', () => {
-      let p = new Point(x, y, true);
+      let p = toPoint(x, y, true);
 
       expect(p instanceof Point).toBeTrue();
       expect(p.x).toStrictEqual(Math.round(x));
       expect(p.y).toStrictEqual(Math.round(y));
     });
 
     it('string x, string y', () => {
-      let p = new Point('x', 'y');
+      let p = toPoint('x', 'y');
+
+      expect(p instanceof Point).toBeTrue();
+      expect(p.x).toBeNaN();
+      expect(p.y).toBeNaN();
+    });
+
+    it('string x, string y, true', () => {
+      let p = toPoint('x', 'y', true);
 
       expect(p instanceof Point).toBeTrue();
       expect(p.x).toBeNaN();