fix: add tests

packages/electrode-react-webapp/lib/render-output.js

@@ -27,7 +27,7 @@ class Output {
         out += x.stringify();
       } else {
         const typeName = (x && x.constructor && x.constructor.name) || typeof x;
-        const msg = `SpotOutput unable to stringify item of type ${typeName}`;
+        const msg = `RenderOutput unable to stringify item of type ${typeName}`;
         console.error("FATAL Error:", msg + "\n"); // eslint-disable-line
         throw new Error(msg);
       }

packages/electrode-react-webapp/test/spec/render-output.spec.js

@@ -185,4 +185,18 @@ describe("render-output", function() {
     };
     expect(() => ro._finish()).to.throw("test error");
   });
+
+  it("should throw if can't stringify an item", () => {
+    const ro = new RenderOutput();
+    ro.add({});
+    expect(() => ro.flush()).to.throw("unable to stringify item of type Object");
+  });
+
+  it("should throw if can't stringify an item without constructor", () => {
+    const ro = new RenderOutput();
+    const item = {};
+    item.constructor = false;
+    ro.add(item);
+    expect(() => ro.flush()).to.throw("unable to stringify item of type object");
+  });
 });

packages/subapp-web/lib/util.js

@@ -1,6 +1,6 @@
 "use strict";
 
-/* eslint-disable global-require, max-statements, no-loop-func */
+/* eslint-disable global-require, max-statements, no-loop-func, max-len */
 
 const Fs = require("fs");
 const assert = require("assert");