add tests

jest.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  roots: ["<rootDir>/src"],
+  testMatch: ["**/__tests__/**/*.+(ts|tsx|js)", "**/?(*.)+(spec|test).+(ts|tsx|js)"],
+  transform: {
+    "^.+\\.(ts|tsx)$": "ts-jest",
+  },
+};

package.json

@@ -3,11 +3,10 @@
   "version": "1.0.0",
   "description": "",
   "main": "dist/index.js",
-  "types": ".src/index.d.ts",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1",
     "watch": "tsc -w",
-    "build": "tsc"
+    "build": "tsc",
+    "test": "jest"
   },
   "repository": {
     "type": "git",
@@ -21,6 +20,9 @@
   },
   "homepage": "https://github.com/livesession/livesession-sdk#readme",
   "devDependencies": {
+    "@types/jest": "^25.2.1",
+    "jest": "^25.4.0",
+    "ts-jest": "^25.4.0",
     "typescript": "^3.8.3"
   },
   "dependencies": {}

src/api.ts

@@ -8,8 +8,8 @@ const apiCall = (name: string, ...args: (object | boolean | string | void)[]) =>
   return window.__ls(name, ...args);
 };
 
-const api = {
-  init: (trackID: string, options: object[]) => apiCall("init", trackID, options),
+const api: any = {
+  init: (trackID: string, options?: object) => apiCall("init", trackID, options),
   getSessionURL: (callback: void) => apiCall("getSessionURL", callback),
   identify: (data: object) => apiCall("identify", data),
   invalidateSession: () => apiCall("invalidateSession"),

src/index.test.ts

@@ -0,0 +1,24 @@
+import livesession from "./index";
+import api from "./api";
+
+test("Call any other function before init", () => {
+  expect(() => {
+    livesession.setOptions({ rootHostname: "test" });
+    throw new Error();
+  }).toThrow();
+});
+
+it("should call init method", () => {
+  const initScript = jest.fn((trackID: string, options?: object) => {
+    livesession.init("test");
+    return api.init(trackID, options);
+  });
+  initScript("jkjfdsfds");
+  expect(initScript).toBeCalledTimes(1);
+});
+
+test("Check if script is added", () => {
+  const initScript = jest.fn(() => window.__ls && console.warn("LiveSession already inited (skipping init() call)"));
+  initScript();
+  expect(initScript).toHaveReturned();
+});

index.ts → src/index.ts

@@ -1,5 +1,5 @@
-import snippet from "./src/snippet";
-import api from "./src/api";
+import snippet from "./snippet";
+import api from "./api";
 
 declare global {
   interface Window {
@@ -11,22 +11,22 @@ const isLoaded = () => window.__ls;
 const safeCall = (name: string) => {
   return (...args: object[]) => {
     if (!isLoaded()) {
-      throw Error("LiveSession is not loaded. Call init() before calling other API functions");
+      throw new Error("LiveSession is not loaded. Call init() before calling other API functions");
     }
     if (!api[name]) {
-      throw Error(`method "${name}" doesn't exist`);
+      throw new Error(`method "${name}" doesn't exist`);
     }
     return api[name](...args);
   };
 };
 
-const _init = (trackID: string, options: object[]) => {
+const _init = (trackID: string, options?: object) => {
   if (isLoaded()) {
     console.warn("LiveSession already inited (skipping init() call)");
     return;
   }
   if (!trackID) {
-    throw Error(`trackID is required`);
+    throw new Error(`trackID is required`);
   }
   snippet();
   return api.init(trackID, options);

src/snippet.js → src/snippet.ts

@@ -10,14 +10,14 @@ const snippet = (
     if (w.__ls) {
       throw new Error("LiveSession script already added");
     }
-    const f = (w.__ls = function () {
+    const f: any = (w.__ls = function () {
       f.push ? f.push.apply(f, arguments) : f.store.push(arguments);
     });
     if (!w.__ls) w.__ls = f;
     f.store = [];
     f.v = SDK_VERSION;
 
-    const ls = d.createElement(t);
+    const ls = <HTMLScriptElement>d.createElement(t);
     ls.async = true;
     ls.src = u;
     ls.charset = "utf-8";

tsconfig.json

@@ -1,8 +1,9 @@
 {
   "compilerOptions": {
-    "target": "es5",
+    "target": "es2015",
     "module": "commonjs",
-    "outDir": "./dist"
+    "outDir": "dist"
   },
-  "include": ["./src/**/*", "index.ts", "src/index.d.ts"]
+  "include": ["./src/**/*", "src/index.ts", "src/index.d.ts"],
+  "exclude": ["node_modules", "**/*.spec.ts"]
 }