Added tests for the Ono.toJSON() static method

test/specs/exports.spec.js

@@ -47,4 +47,10 @@ describe("package exports", () => {
     expect(Ono.length).to.equal(1);
   });
 
+  it("should export the Ono.toJSON static method", () => {
+    expect(Ono.toJSON).to.be.a("function");
+    expect(Ono.toJSON.name).to.equal("toJSON");
+    expect(Ono.toJSON.length).to.equal(1);
+  });
+
 });

test/specs/ono-tojson.spec.js

@@ -0,0 +1,51 @@
+"use strict";
+
+const { Ono } = require("../../");
+const { expect } = require("chai");
+const { comparePOJO } = require("../utils");
+
+describe("Ono.toJSON()", () => {
+
+  it("should return all built-in error properties", () => {
+    let err = new TypeError("Something went wrong");
+
+    expect(Ono.toJSON(err)).to.satisfy(comparePOJO({
+      name: "TypeError",
+      message: "Something went wrong",
+      stack: err.stack
+    }));
+  });
+
+  it("should return custom properties", () => {
+    let err = new SyntaxError("Something went wrong");
+    err.foo = "bar";
+    err.biz = 5;
+
+    expect(Ono.toJSON(err)).to.satisfy(comparePOJO({
+      name: "SyntaxError",
+      message: "Something went wrong",
+      stack: err.stack,
+      foo: "bar",
+      biz: 5
+    }));
+  });
+
+  it("should return object properties", () => {
+    let obj = { foo: "bar" };
+    let date = new Date();
+    let regex = /xyz/;
+
+    let err = new Error("Something went wrong");
+    Object.assign(err, { obj, date, regex });
+
+    expect(Ono.toJSON(err)).to.satisfy(comparePOJO({
+      name: "Error",
+      message: "Something went wrong",
+      stack: err.stack,
+      obj,
+      date,
+      regex,
+    }));
+  });
+
+});

test/specs/typescript.spec.ts

@@ -159,6 +159,23 @@ export function testOnoConstructorWithNonErrorClass() {
 }
 
 
+export function testOnoToJSON() {
+  let pojo = Ono.toJSON(err);
+
+  // ErrorPOJO props
+  pojo.name = "string";
+  pojo.message = "string";
+  pojo.stack = "string";
+
+  let pojo2 = Ono.toJSON(errPOJO);
+
+  // ErrorPOJO props
+  pojo2.name = "string";
+  pojo2.message = "string";
+  pojo2.stack = "string";
+}
+
+
 export function testOnoSignatures() {
   ono(message);
   ono(message, param1, param2);