Improve Coordinate Test Coverage

Author: gmitch215

src/coordinate.js

@@ -114,6 +114,9 @@ export class Coordinate2D extends Coordinate {
      * @static
      * @param {string} str The string to convert 
      * @returns {Coordinate2D} The 2D Coordinate
+     * @throws {SyntaxError} If the string is invalid.
+     * @example
+     * Coordinate2D.fromString('[1, 2]')
      */
     static fromString(str) {
         if (!str || typeof(str) !== 'string')
@@ -204,6 +207,8 @@ export class Coordinate3D extends Coordinate {
      * @static
      * @param {string} str The string to convert 
      * @returns {Coordinate3D} The 3D Coordinate
+     * @example
+     * Coordinate3D.fromString('[1, 2, 3]')
      */
     static fromString(str) {
         if (!str || typeof(str) !== 'string')

tests/coordinate.test.js

@@ -39,6 +39,24 @@ describe('coordinates', () => {
         expect(c).toEqual(Coordinate3D.zero)
     })
 
+    test('zero 2D', () => {
+        expect(Coordinate2D.zero.toString()).toBe('[0, 0]')
+    })
+
+    test('zero 3D', () => {
+        expect(Coordinate3D.zero.toString()).toBe('[0, 0, 0]')
+    })
+
+    test('toString 2D', () => {
+        const c = new Coordinate2D(2, 3)
+        expect(c.toString()).toBe('[2, 3]')
+    })
+
+    test('toString 3D', () => {
+        const c = new Coordinate3D(2, 3, 4)
+        expect(c.toString()).toBe('[2, 3, 4]')
+    })
+
     test('fromString 2D', () => {
         let c = Coordinate2D.fromString('[2,3]')
         expect(c.x).toBe(2)