Added Jest infrastructure for unit testing

jest.config.js

@@ -0,0 +1,25 @@
+module.exports = {
+    "globals": {
+        'ts-jest': {
+            "tsConfig": 'tsconfig.test.json'
+        }
+    },
+    "roots": [
+        "tests"
+    ],
+    "transform": {
+        "^.+\\.(ts|tsx)?$": "ts-jest"
+    },
+    "moduleNameMapper": {
+        "\\.(scss|html)$": "<rootDir>/tests/empty-module.js"
+    },
+    "testRegex": "(/tests/.*|(\\.|/)(test|spec))\\.(ts|tsx)?$",
+    "moduleFileExtensions": [
+        "ts",
+        "tsx",
+        "js",
+        "jsx",
+        "json",
+        "node"
+    ],
+}

package.json

@@ -2,6 +2,8 @@
   "scripts": {
     "start": "npm run build_dev && live-server --port=7777",
     "serve": "live-server --port=7777",
+    "test": "jest",
+    "testDev": "jest --watch",
     "release": "standard-version --message \"Release: %s\" ",
     "build_dev": "webpack --env.buildType dev --env.platform pdf",
     "build_prod": "npm run build_dev && webpack --env.buildType prod --env.platform pdf"
@@ -10,6 +12,7 @@
   "name": "survey-pdf",
   "private": true,
   "devDependencies": {
+    "@types/jest": "^23.3.3",
     "@types/jspdf": "^1.2.2",
     "@types/lodash": "4.14.121",
     "@types/node": "7.0.4",
@@ -23,6 +26,7 @@
     "github-api": "^3.0.0",
     "html-loader": "0.4.4",
     "http-server": "0.9.0",
+    "jest": "^23.6.0",
     "jspdf": "git+https://github.com/MrRio/jsPDF.git",
     "live-server": "1.2.0",
     "node-uuid": "1.4.7",
@@ -33,6 +37,7 @@
     "standard-version": "4.0.0",
     "style-loader": "0.13.1",
     "survey-core": "^1.0.78",
+    "ts-jest": "^23.10.3",
     "ts-loader": "2.3.4",
     "tslint": "4.5.1",
     "typescript": "2.6.1",

tests/common.test.ts

@@ -0,0 +1,6 @@
+import { JsPdfSurveyModel } from "../src/jspdf/survey";
+
+test("first", () => {
+    let survey = new JsPdfSurveyModel({});
+    expect(survey).toBeDefined();
+});

tests/empty-module.js

@@ -0,0 +1 @@
+module.exports = '';

tsconfig.test.json

@@ -0,0 +1,23 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "es2015",
+    "lib": [
+      "DOM",
+      "ES5",
+      "ES2015.Promise"
+    ],
+    "sourceMap": true,
+    "noImplicitAny": true,
+    "importHelpers": false,
+    "experimentalDecorators": true,
+    "moduleResolution": "node",
+    "allowSyntheticDefaultImports": true
+  },
+  "exclude": [
+    "src/entries/**/*.ts"
+  ],
+  "include": [
+    "src/**/*.ts"
+  ]
+}