Add tests for Rules redux action/reducer

app/soapbox/__fixtures__/rules.json

@@ -0,0 +1,14 @@
+[
+  {
+    "id": "1",
+    "text": "Illegal activity and behavior",
+    "subtext": "Content that depicts illegal or criminal acts, threats of violence.",
+    "rule_type": "content"
+  },
+  {
+    "id": "2",
+    "text": "Intellectual property infringement",
+    "subtext": "Impersonating another account or business, infringing on intellectual property rights.",
+    "rule_type": "content"
+  }
+]

app/soapbox/actions/__tests__/rules.test.ts

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+import { __stub } from 'soapbox/api';
+import { mockStore, rootState } from 'soapbox/jest/test-helpers';
+
+import { fetchRules, RULES_FETCH_REQUEST, RULES_FETCH_SUCCESS } from '../rules';
+
+describe('fetchRules()', () => {
+  it('sets the rules', (done) => {
+    const rules = require('soapbox/__fixtures__/rules.json');
+
+    __stub((mock) => {
+      mock.onGet('/api/v1/instance/rules').reply(200, rules);
+    });
+
+    const store = mockStore(rootState);
+
+    store.dispatch(fetchRules()).then((context) => {
+      const actions = store.getActions();
+
+      expect(actions[0].type).toEqual(RULES_FETCH_REQUEST);
+      expect(actions[1].type).toEqual(RULES_FETCH_SUCCESS);
+      expect(actions[1].payload[0].id).toEqual('1');
+
+      done();
+    }).catch(console.error);
+  });
+});

app/soapbox/reducers/__tests__/rules.test.ts

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+
+import { RULES_FETCH_REQUEST, RULES_FETCH_SUCCESS } from 'soapbox/actions/rules';
+
+import reducer from '../rules';
+
+const initialState = {
+  items: [],
+  isLoading: false,
+};
+
+describe('rules reducer', () => {
+  it('should return the initial state', () => {
+    expect(reducer(undefined, {} as any)).toEqual(initialState);
+  });
+
+  describe('RULES_FETCH_REQUEST', () => {
+    it('sets "needsOnboarding" to "true"', () => {
+      const action = { type: RULES_FETCH_REQUEST };
+      expect(reducer(initialState, action).isLoading).toEqual(true);
+    });
+  });
+
+  describe('ONBOARDING_END', () => {
+    it('sets "needsOnboarding" to "false"', () => {
+      const action = { type: RULES_FETCH_SUCCESS, payload: [{ id: '123' }] };
+      const result = reducer(initialState, action);
+      expect(result.isLoading).toEqual(false);
+      expect(result.items[0].id).toEqual('123');
+    });
+  });
+});