build(lint): better linting with typechecking

package.json

@@ -28,7 +28,7 @@
     "node": ">=6.0.0"
   },
   "scripts": {
-    "lint": "tslint -e **/node_modules/** -e **/dist/** -e **/lib/** -t codeFrame **/*.ts ",
+    "lint": "tslint --type-check -p tsconfig.test.json -e **/node_modules/** -e **/dist/** -e **/lib/** -t codeFrame **/*.ts ",
     "prebuild": "rimraf dist && rimraf docs && rimraf lib",
     "build": "npm run bundle && npm run optimize && npm run minify && npm run size",
     "bundle": "tsc && rollup -f umd -m dist/typedash.dev.js.map -n typedash -o dist/typedash.dev.js lib/typedash.js",

src/objects.ts

@@ -15,7 +15,7 @@ export function keys<T extends object> (item: T): (keyof T)[] {
  * @param item The object to check
  * @returns {boolean}
  */
-export function isEmpty (item?: Object | Array<any>): boolean {
+export function isEmpty (item?: Object | Array<any> | null): boolean {
   return !item || (isArray(item) && !item.length) || !keys(item).length
 }
 
@@ -197,7 +197,7 @@ export function patch<T extends object> (old: T, patch: Partial<T>): Partial<T>
  * @param objB
  * @returns {boolean}
  */
-export function shallowEqual (objA: Object, objB: Object) {
+export function shallowEqual (objA: Object | null | undefined, objB: Object | null | undefined) {
   if (objA === objB) {
     return true
   }

test/objects.spec.ts

@@ -294,9 +294,7 @@ describe('Objects test', () => {
     })
 
     it('should treat objects created by `Object.create(null)` like any other plain object', () => {
-      function Foo () { this.a = 1 }
-
-      Foo.prototype.constructor = null
+      class Foo { a = 1 }
 
       const object2 = {'a': 1}
       expect(shallowequal(new Foo(), object2)).toEqual(true)

tsconfig.test.json

@@ -1,24 +1,7 @@
 {
-  "compilerOptions": {
-    "outDir": "lib",
-    "declaration": true,
-    "moduleResolution": "node",
-    "module": "es6",
-    "target": "es5",
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "importHelpers": true,
-    "lib": [
-      "es5",
-      "dom"
-    ],
-    "strict": true,
-    "sourceMap": true,
-    "typeRoots": [
-      "node_modules/@types"
-    ]
-  },
+  "extends":"./tsconfig.json",
   "include": [
-    "src"
+    "src",
+    "test"
   ]
 }