Fix/null undefined validation

src/core/friendly_errors/param_validator.js

@@ -551,7 +551,7 @@ function validateParams(p5, fn, lifecycles) {
       args.every(arg => arg === undefined)
     ) {
       const undefinedErrorMessage = `🌸 p5.js says: All arguments for ${func}() are undefined. There is likely an error in the code.`;
-
+      console.log(undefinedErrorMessage);
       return {
         success: false,
         error: undefinedErrorMessage

src/math/noise.js

@@ -265,6 +265,7 @@ function noise(p5, fn){
    * @return {Number}     Perlin noise value at specified coordinates.
    */
   fn.noise = function(x, y = 0, z = 0) {
+    if (x === null || y === null || z === null) return NaN;
     if (perlin == null) {
       perlin = new Array(PERLIN_SIZE + 1);
       for (let i = 0; i < PERLIN_SIZE + 1; i++) {

test/unit/math/noise.js

@@ -34,6 +34,16 @@ suite('Noise', function() {
     });
   });
 
+  // Test for null arguments
+  suite('null arguments', function() {
+    test('null should returns NaN', function() {
+      assert.isNaN(mockP5Prototype.noise(null));
+    });
+    test('noise(0, 0, null) returns NaN', function() {
+      assert.isNaN(mockP5Prototype.noise(0, 0, null));
+    });
+  });
+
   // Test for noiseSeed
   suite('p5.prototype.noiseSeed', function() {
     beforeEach(function() {