Specify files and add testing

src/index/index.test.ts

@@ -0,0 +1,11 @@
+import Index from "./index";
+
+test('test uncovered if', () => {
+  const indexObj = new Index();
+  expect(indexObj.uncovered_if()).toEqual(false);
+});
+
+test('fully covered', () => {
+  const indexObj = new Index();
+  expect(indexObj.fully_covered()).toEqual(true);
+});

src/index/index.ts

@@ -0,0 +1,21 @@
+export default class Index {
+
+  //This function is tested and part of it is uncovered
+  uncovered_if = (a = true) => {
+    if (a == true) {
+      return false
+    } else {
+      return true
+    }
+  }
+
+  //This function will be fully covered
+  fully_covered = () => {
+    return true
+  }
+
+  //This function will not be tested by unit tests
+  uncovered = () => {
+    return true
+  }
+}