reducer_test.js

import {
  nearestBranchRequest,
  nearestBranchSuccess,
  nearestBranchFailure,
  INITIAL_STATE
} from '../branchReducer';

describe('branch reducer tests', () => {
  it('given latitude and longitude when nearestBranchRequest then should set latitude, longitude and searching to true', () => {
    const latitude = 1;
    const longitude = 1;

    const state = nearestBranchRequest(INITIAL_STATE, {
      payload: { latitude, longitude }
    });

    const expectedState = {
      ...INITIAL_STATE,
      latitude,
      longitude,
      searching: true
    };
    expect(state).toEqual(expectedState);
  });

  it('given nearest branch when nearestBranchSuccess then should set nearestBranch and searching to false', () => {
    const nearestBranch = 100;

    const state = nearestBranchSuccess(INITIAL_STATE, {
      payload: { nearestBranch: nearestBranch }
    });

    const expectedState = {
      ...INITIAL_STATE,
      nearestBranch: nearestBranch,
      searching: false
    };
    expect(state).toEqual(expectedState);
  });

  it('when nearestBranchFailure then should set searching to false', () => {
    const state = nearestBranchFailure({ ...INITIAL_STATE, searching: true });

    const expectedState = { ...INITIAL_STATE, searching: false };
    expect(state).toEqual(expectedState);
  });
});