Add code coverage

Author: abraham

.coveralls.yml

@@ -0,0 +1,2 @@
+service_name: travis-pro
+repo_token: iHctMRQ1rYAUMqiyQH6PITDEQXvwaTknc

.gitignore

@@ -3,3 +3,4 @@ node_modules
 package-lock.json
 yarn.lock
 .idea
+/coverage

.travis.yml

@@ -9,4 +9,5 @@ script:
   - npm run lint
   - npm run build
   - npm run test
+  - npm run coveralls
   - npm run pkg-ok

README.md

@@ -2,7 +2,7 @@
 [![Build Status](https://img.shields.io/travis/abraham/reflection.svg?style=flat)](https://travis-ci.org/abraham/reflection)
 [![Dependency Status](https://david-dm.org/abraham/reflection.svg?style=flat)](https://david-dm.org/abraham/reflection)
 [![npm bundle size (minified + gzip)](https://img.shields.io/bundlephobia/minzip/@abraham/reflection.svg?style=flat&colorB=4bc524)](https://bundlephobia.com/result?p=@abraham/reflection)
-
+[![Coverage Status](https://coveralls.io/repos/github/abraham/reflection/badge.svg?branch=master)](https://coveralls.io/github/abraham/reflection?branch=master)
 
 Reflection
 ====

package.json

@@ -8,6 +8,7 @@
   "scripts": {
     "build": "tsc && rollup -c",
     "clean": "rimraf dist",
+    "coveralls": "cat ./coverage/lcov.info | coveralls",
     "lint": "eslint src --ext .ts",
     "prebuild": "npm run clean",
     "prepare": "npm run build",
@@ -40,6 +41,7 @@
     "@types/jest": "25.1.4",
     "@typescript-eslint/eslint-plugin": "2.23.0",
     "@typescript-eslint/parser": "2.23.0",
+    "coveralls": "3.0.9",
     "eslint": "6.8.0",
     "eslint-plugin-import": "2.20.1",
     "eslint-plugin-jest": "23.8.2",
@@ -51,6 +53,7 @@
     "typescript": "3.8.3"
   },
   "jest": {
+    "collectCoverage": true,
     "roots": [
       "<rootDir>/src"
     ],

src/decorate.test.ts

@@ -34,14 +34,26 @@ test('with property and descriptor and invalid decorators', () => {
   expect(() => Reflect.decorate(decorators, target, property, descriptor)).toThrow(TypeError);
 });
 
-test('with decorators, property, and descriptor and invalid target ', () => {
+test('with decorators, property, and descriptor and invalid target', () => {
   const decorators: PropertyDecorator[] = [];
   const target: any = 1;
   const property = 'name';
   const descriptor = {};
   expect(() => Reflect.decorate(decorators, target, property, descriptor)).toThrow(TypeError);
 });
 
+test('with decorators, undefined property, and descriptor and invalid target', () => {
+  const sent: Function[] = [];
+  const decorators: any = [
+    (target: Function): void => { sent.push(target); },
+  ];
+  const target: any = 1;
+  const property = undefined;
+  const descriptor = {};
+  const result = Reflect.decorate(decorators, target, property, descriptor);
+  expect(result).toBeUndefined();
+});
+
 test('executes decorators in reverse order for function', () => {
   const order: number[] = [];
   const decorators = [

src/has-metadata.test.ts

@@ -0,0 +1,42 @@
+import './index';
+
+test('with invalid target', () => {
+  const target: any = undefined;
+  expect(() => Reflect.hasMetadata('key', target)).toThrow(TypeError);
+});
+
+test('when not defined', () => {
+  const target = {};
+  expect(Reflect.hasMetadata('key', target)).toBeFalsy();
+});
+
+test('when defined', () => {
+  const target = {};
+  Reflect.defineMetadata('key', 'value', target);
+  expect(Reflect.hasMetadata('key', target)).toBeTruthy();
+});
+
+test('when defined on prototype', () => {
+  const prototype = {};
+  const target = Object.create(prototype);
+  Reflect.defineMetadata('key', 'value', prototype);
+  expect(Reflect.hasMetadata('key', target)).toBeTruthy();
+});
+
+test('with key and not defined', () => {
+  const target = {};
+  expect(Reflect.hasMetadata('key', target, 'name')).toBeFalsy();
+});
+
+test('with key and defined', () => {
+  const target = {};
+  Reflect.defineMetadata('key', 'value', target, 'name');
+  expect(Reflect.hasMetadata('key', target, 'name')).toBeTruthy();
+});
+
+test('when defined on prototype with a property key', () => {
+  const prototype = {};
+  const target = Object.create(prototype);
+  Reflect.defineMetadata('key', 'value', prototype, 'name');
+  expect(Reflect.hasMetadata('key', target, 'name')).toBeTruthy();
+});