fix: use nullish checks for node api input

src/core/Dish.mjs

@@ -37,7 +37,7 @@ class Dish {
     constructor(dishOrInput=null, type = null) {
         this.value = new ArrayBuffer(0);
         this.type = Dish.ARRAY_BUFFER;
-        const hasInput = Boolean(dishOrInput) || dishOrInput === 0;
+        const hasInput = dishOrInput !== undefined && dishOrInput !== null;
 
         // Case: dishOrInput is dish object
         if (hasInput &&

src/node/api.mjs

@@ -98,7 +98,7 @@ function transformArgs(opArgsList, newArgs) {
  * @param input
  */
 function ensureIsDish(input) {
-    if (!input && input !== 0) {
+    if (input === undefined || input === null) {
         return new NodeDish();
     }
 

tests/node/tests/nodeApi.mjs

@@ -97,7 +97,7 @@ TestRegister.addApiTests([
         assert(result instanceof NodeDish);
     }),
 
-    it("should preserve numeric zero input", () => {
+    it("should process numeric zero input", () => {
         const result = chef.toHex(0);
         assert.strictEqual(result.toString(), "30");
     }),
@@ -185,7 +185,7 @@ TestRegister.addApiTests([
         assert.strictEqual(result.toString(), "ONXW2ZJANFXHA5LU");
     }),
 
-    it("chef.bake: should preserve numeric zero input", async () => {
+    it("chef.bake: should process numeric zero input", async () => {
         const result = await chef.bake(0, "to hex");
         assert.strictEqual(result.toString(), "30");
     }),

tests/node/tests/operations.mjs

@@ -59,7 +59,7 @@ TestRegister.addApiTests([
         assert.strictEqual(result.toString(), "7");
     }),
 
-    it("ADD: preserves numeric zero input", () => {
+    it("ADD: processes numeric zero input", () => {
         const result = chef.ADD(0, {
             key: "4",
         });
@@ -1185,4 +1185,3 @@ ExifImageHeight: 57`);
 
 
 ]);
-