first commit

test/state.test.js

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+import actions from '../src/store/actions';
+import getters from '../src/store/getters';
+import mutations from '../src/store/mutations';
+import trueState from '../src/store/state';
+
+const countries = [
+  {
+    name: 'Colombia',
+    capital: 'Bogotá',
+  },
+  {
+    name: 'Romania',
+    capital: 'Bucharest',
+  },
+];
+const state = { countries };
+let url = '';
+let mockError = false;
+
+jest.mock('axios', () => ({
+  get: (_url) => {
+    return new Promise((resolve) => {
+      if (mockError) throw Error();
+      url = _url;
+      resolve(true);
+    });
+  },
+}));
+
+const commit = jest.fn();
+commit.mockReturnValue('SET_COUNTRIES', countries);
+
+describe('actions', () => {
+  actions.getCountries({ commit });
+
+  it('url check', () => {
+    expect.assertions(2);
+    expect(url).toBeDefined();
+    expect(url).toBe('https://restcountries.eu/rest/v2/all');
+  });
+
+  it('commit', () => {
+    expect.assertions(2);
+    expect(commit).toBeCalled();
+    expect(commit).toHaveBeenCalledTimes(1);
+  });
+});
+
+describe('getters', () => {
+  const testGetters = getters.allCountries(state);
+  it('returns countries', () => {
+    expect.assertions(2);
+    expect(testGetters).toBeDefined();
+    expect(testGetters).toEqual(state.countries);
+  });
+});
+
+describe('mutations', () => {
+  it('adds countries to the state', () => {
+    expect.assertions(2);
+    mutations.SET_COUNTRIES(state, countries);
+    expect(mutations).toBeDefined();
+    expect(state).toEqual({
+      countries,
+    });
+  });
+});
+describe('state', () => {
+  it('state exists and has countries', () => {
+    expect.assertions(3);
+    expect(trueState).toBeDefined();
+    expect(trueState).toHaveProperty('countries');
+    expect(trueState).not.toHaveProperty('cats');
+  });
+});

test/test.js

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+describe('Component.js', () => {
+  test('smoke test', () => {
+    expect(true).toBe(true) // will obviously always pass
+  })
+})