fix(test): add some spec tests

.github/workflows/release.yml

@@ -14,6 +14,8 @@ jobs:
           fetch-depth: 0
       - name: Install dependencies
         run: npm ci
+      - name: Test
+        run: npm test
       - name: Release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

MMM-json.js

@@ -43,7 +43,7 @@ Module.register("MMM-json", {
   socketNotificationReceived: function (notification, payload) {
     if (
       notification === "MMM_JSON_GET_RESPONSE" &&
-      payload.identifier == this.identifier
+      payload.identifier === this.identifier
     ) {
       if (payload.error === true) {
         console.error(

MMM-json.spec.js

@@ -0,0 +1,41 @@
+/* eslint no-multi-spaces: 0 */
+const expect = require("chai").expect;
+
+let modulename = "MMM-json";
+
+xdescribe("Functions module MMM-json", function () {
+  before(function () {
+    Module = {};
+    config = {};
+    Module.definitions = {};
+    Module.register = function (name, moduleDefinition) {
+      Module.definitions[name] = moduleDefinition;
+    };
+    require("./MMM-json");
+    Module.definitions[modulename].config = {};
+  });
+
+  describe("getHeader", function () {
+    describe("with header icon", function () {
+      before(function () {
+        Module.definitions[modulename].config.headerIcon = "icon";
+      });
+
+      it(`should be empty`, function () {
+        expect(Module.definitions[modulename].getHeader()).to.equal("");
+      });
+    });
+
+    describe("without header icon", function () {
+      before(function () {
+        Module.definitions[modulename].data.header = "I am a Header";
+      });
+
+      it(`should contain header`, function () {
+        expect(Module.definitions[modulename].getHeader()).to.equal(
+          "I am a Header"
+        );
+      });
+    });
+  });
+});