Add test template

package.json

@@ -16,6 +16,7 @@
     "build:es5": "webpack --config webpack_config/webpack.config.product.js",
     "build:es6": "tsc",
     "test": "npm run test:src && npm run test:node",
+    "test:new": "jest spec/new.spec.ts",
     "test:src": "jest spec/tin.spec.ts",
     "test:node": "npm run build:es5 && jest spec/tin_node.spec.js",
     "preversion": "npm run lint & npm run test",

spec/new.spec.ts

@@ -0,0 +1,11 @@
+import func2 from '../src/triangleTest';
+
+const testSet = () => { 
+  describe('Test by actual data', () => { 
+    it('Compare with actual data', () => { 
+      expect(func2()).toEqual(2);
+    });
+  });
+};
+
+describe("Test for Tin function", testSet);

src/triangleTest.ts

@@ -0,0 +1,5 @@
+import { featureCollection, lineString, point, polygon } from "@turf/helpers";
+
+export default function triangleTest() {
+  return 2;
+}