Introduce jest for testing. (#114)

We are already using Mocha as testing framework but for some reasons
such as readability and convenience, we decided to use jest instead of
Mocha.

After this patch, ./bacardi test will run both of Mocha and jest.
Once we write test codes enough in jest, we will deprecate Mocha.

ISSUE=#99,#100
TBR=@hwanseung,@yjaeseok

Author: romandev

bootstrap/command/test

@@ -28,6 +28,7 @@ function is_already_formatted() {
 
 if is_already_formatted; then
   mocha --napi-modules examples/calculator.js
+  node --napi-modules $(bacardi_path)/node_modules/jest/bin/jest.js
 else
   echo "You should run |bacardi format| command first."
 fi

package.json

@@ -1,17 +1,35 @@
 {
   "devDependencies": {
+    "@types/jest": "^21.1.2",
     "@types/node": "^8.0.24",
     "bindings": "^1.3.0",
+    "jest": "^21.2.1",
+    "mkdirp": "^0.5.1",
     "mocha": "^3.5.0",
     "node-addon-api": "^0.6.3",
     "node-gyp": "^3.6.2",
     "nunjucks": "^3.0.1",
-    "mkdirp": "^0.5.1",
     "snake-case": "^2.1.0",
+    "ts-jest": "^21.1.0",
     "typescript": "^2.4.2",
     "webidl2": "^4.1.0"
   },
   "optionalDependencies": {
     "windows-build-tools": "^1.3.2"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "jsx",
+      "ts",
+      "tsx"
+    ],
+    "testMatch": [
+      "**/*.test.(ts|tsx)"
+    ],
+    "transform": {
+      "^.+\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
+    }
   }
 }

test/interface_constructor.test.ts

@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) 2017 The Bacardi Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as bindings from 'bindings';
+
+const bacardi = bindings('bacardi.node');
+
+test('Default constructor', async () => {
+  let test_interface: bacardi.TestInterface = new bacardi.TestInterface();
+  expect(test_interface instanceof bacardi.TestInterface).toBe(true);
+});

tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compileOnSave": true,
+  "compilerOptions": {
+    "baseUrl": ".",
+    "experimentalDecorators": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "preserveConstEnums": true,
+    "sourceMap": true,
+    "target": "es5"
+  }
+}