chore: migrate createDiscussion to ts and add tests

app/actions/createDiscussion.js

@@ -1,22 +0,0 @@
-import * as types from './actionsTypes';
-
-export function createDiscussionRequest(data) {
-	return {
-		type: types.CREATE_DISCUSSION.REQUEST,
-		data
-	};
-}
-
-export function createDiscussionSuccess(data) {
-	return {
-		type: types.CREATE_DISCUSSION.SUCCESS,
-		data
-	};
-}
-
-export function createDiscussionFailure(err) {
-	return {
-		type: types.CREATE_DISCUSSION.FAILURE,
-		err
-	};
-}

app/actions/createDiscussion.ts

@@ -0,0 +1,38 @@
+import { Action } from 'redux';
+
+import { CREATE_DISCUSSION } from './actionsTypes';
+
+interface ICreateDiscussionRequest extends Action {
+	data: any;
+}
+
+interface ICreateDiscussionSuccess extends Action {
+	data: any;
+}
+
+interface ICreateDiscussionFailure extends Action {
+	err: any;
+}
+
+export type TActionCreateDiscussion = ICreateDiscussionRequest & ICreateDiscussionSuccess & ICreateDiscussionFailure;
+
+export function createDiscussionRequest(data: any): ICreateDiscussionRequest {
+	return {
+		type: CREATE_DISCUSSION.REQUEST,
+		data
+	};
+}
+
+export function createDiscussionSuccess(data: any): ICreateDiscussionSuccess {
+	return {
+		type: CREATE_DISCUSSION.SUCCESS,
+		data
+	};
+}
+
+export function createDiscussionFailure(err: any): ICreateDiscussionFailure {
+	return {
+		type: CREATE_DISCUSSION.FAILURE,
+		err
+	};
+}

app/reducers/createDiscussion.test.ts

@@ -0,0 +1,33 @@
+import { createDiscussionRequest, createDiscussionSuccess, createDiscussionFailure } from '../actions/createDiscussion';
+import { initialState } from './createDiscussion';
+import { mockedStore } from './mockedStore';
+
+describe('test reducer', () => {
+	it('should return initial state', () => {
+		const { createDiscussion } = mockedStore.getState();
+		expect(createDiscussion).toEqual(initialState);
+	});
+
+	it('should return correct createDiscussion state after dispatch createDiscussionRequest action', () => {
+		mockedStore.dispatch(createDiscussionRequest({}));
+		const { createDiscussion } = mockedStore.getState();
+		expect(createDiscussion).toEqual({ isFetching: true, failure: false, error: {}, result: {} });
+	});
+
+	it('should return correct createDiscussion state after dispatch createDiscussionSuccess action', () => {
+		mockedStore.dispatch(createDiscussionSuccess({ data: true }));
+		const { createDiscussion } = mockedStore.getState();
+		expect(createDiscussion).toEqual({ isFetching: false, failure: false, result: { data: true }, error: {} });
+	});
+
+	it('should return correct createDiscussion state after dispatch createDiscussionFailure action', () => {
+		mockedStore.dispatch(createDiscussionFailure({ err: true }));
+		const { createDiscussion } = mockedStore.getState();
+		expect(createDiscussion).toEqual({
+			isFetching: false,
+			failure: true,
+			result: { data: true },
+			error: { err: true }
+		});
+	});
+});

app/reducers/createDiscussion.ts

@@ -1,13 +1,21 @@
+import { TApplicationActions } from '../definitions';
 import { CREATE_DISCUSSION } from '../actions/actionsTypes';
 
-const initialState = {
+export interface ICreateDiscussion {
+	isFetching: boolean;
+	failure: boolean;
+	result: Record<string, string>;
+	error: Record<string, string>;
+}
+
+export const initialState: ICreateDiscussion = {
 	isFetching: false,
 	failure: false,
 	result: {},
 	error: {}
 };
 
-export default function (state = initialState, action) {
+export default function (state = initialState, action: TApplicationActions): ICreateDiscussion {
 	switch (action.type) {
 		case CREATE_DISCUSSION.REQUEST:
 			return {