Validate if GeoPoint values is number

src/ParseGeoPoint.js

@@ -53,7 +53,7 @@ class ParseGeoPoint {
       ParseGeoPoint._validate(arg1.latitude, arg1.longitude);
       this._latitude = arg1.latitude;
       this._longitude = arg1.longitude;
-    } else if (typeof arg1 === 'number' && typeof arg2 === 'number') {
+    } else if (arg1 !== undefined && arg2 !== undefined) {
       ParseGeoPoint._validate(arg1, arg2);
       this._latitude = arg1;
       this._longitude = arg2;
@@ -163,7 +163,10 @@ class ParseGeoPoint {
    * Throws an exception if the given lat-long is out of bounds.
    */
   static _validate(latitude: number, longitude: number) {
-    if (latitude !== latitude || longitude !== longitude) {
+    if (
+      isNaN(latitude) || isNaN(longitude) ||
+      typeof latitude !== 'number' || typeof longitude !== 'number'
+    ) {
       throw new TypeError(
         'GeoPoint latitude and longitude must be valid numbers'
       );

src/__tests__/ParseGeoPoint-test.js

@@ -30,14 +30,27 @@ describe('GeoPoint', () => {
     expect(point.longitude).toBe(88);
   });
 
-  it('throws when created with NaN values', () => {
-    expect(function() {
-      new ParseGeoPoint(NaN, NaN);
-    }).toThrow('GeoPoint latitude and longitude must be valid numbers');
+  it('throws when created with non numbers values', () => {
+    [
+      [NaN, NaN],
+      [false, true],
+      ["29", "10"],
+      [29, "10"],
+      ["29", 10],
+      [["29", "10"]],
+      [{ latitude: "29", longitude: "10" }],
+    ].forEach(case_test => {
+      expect(function() {
+        new ParseGeoPoint(...case_test);
+      }).toThrow('GeoPoint latitude and longitude must be valid numbers');
+    });
   });
 
   it('can set latitude and longitude', () => {
     const point = new ParseGeoPoint();
+    expect(point.latitude).toBe(0);
+    expect(point.longitude).toBe(0);
+
     point.latitude = 5.5;
     expect(point.latitude).toBe(5.5);