Tests for TS typings

.gitignore

@@ -128,5 +128,3 @@ $RECYCLE.BIN/
 
 # End of https://www.gitignore.io/api/node,windows,linux,macos
 lib/*
-
-!lib/index.d.ts

package.json

@@ -4,12 +4,14 @@
   "description": "Write your actions and reducers without pain",
   "main": "lib/index.js",
   "scripts": {
-    "test": "eslint . && nyc ava",
+    "test": "eslint . && nyc ava && npm run types",
+    "types": "rm -rf node_modules && npm i -g dtslint && dtslint types",
     "build": "babel ./src -d ./lib",
     "coverage": "NODE_ENV=test nyc report --reporter=text-lcov",
     "report": "nyc report --reporter=text-lcov | coveralls",
     "prepublish": "npm run build"
   },
+  "types": "types",
   "files": [
     "lib",
     "src"
@@ -46,6 +48,7 @@
     "@babel/preset-env": "^7.0.0",
     "ava": "^0.25.0",
     "coveralls": "^3.0.1",
+    "dtslint": "^0.3.0",
     "eslint": "^4.19.1",
     "nyc": "^12.0.2"
   }

types/index.d.ts

@@ -0,0 +1,31 @@
+// TypeScript Version: 2.8
+
+export interface NamespaceOptions<State> {
+	namespace?: string;
+	defaultReducer?: (prevState: State) => State;
+	separator?: string;
+}
+
+export type Symbiote<State> = ((state: State, ...payload: any[]) => State);
+
+export type Reducer<State> = (state: State, action: Action) => State;
+
+export type ActionsConfig<State, Actions> = {
+	[Key in keyof Actions]: Actions[Key] extends Function // tslint:disable-line
+		? Symbiote<State>
+		: ActionsConfig<State, Actions[Key]>
+};
+
+export interface Action<Payload = any> {
+	type: string;
+	payload?: Payload;
+}
+
+export function createSymbiote<State, Actions>(
+	initialState: State,
+	actionsConfig: ActionsConfig<State, Actions>,
+	namespaceOptions?: string | NamespaceOptions<State>,
+): {
+	actions: Actions,
+	reducer: Reducer<State>,
+};