feat: Redux Integration in @sentry/react (#2717)

CHANGELOG.md

@@ -17,6 +17,7 @@
 - [tracing] fix: APM CDN bundle expose startTransaction (#2726)
 - [browser] fix: Correctly remove all event listeners (#2725)
 - [tracing] fix: Add manual `DOMStringList` typing (#2718)
+- [react] feat: Export `createReduxEnhancer` to log redux actions as breadcrumbs, and attach state as an extra. (#2717)
 
 ## 5.19.0
 

packages/react/package.json

@@ -17,6 +17,7 @@
   },
   "dependencies": {
     "@sentry/browser": "5.19.2",
+    "@sentry/minimal": "5.19.2",
     "@sentry/types": "5.19.2",
     "@sentry/utils": "5.19.2",
     "hoist-non-react-statics": "^3.3.2",
@@ -39,6 +40,7 @@
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
     "react-test-renderer": "^16.13.1",
+    "redux": "^4.0.5",
     "rimraf": "^2.6.3",
     "tslint": "^5.16.0",
     "tslint-react": "^5.0.0",

packages/react/src/index.ts

@@ -25,5 +25,6 @@ export * from '@sentry/browser';
 
 export { Profiler, withProfiler, useProfiler } from './profiler';
 export { ErrorBoundary, withErrorBoundary } from './errorboundary';
+export { createReduxEnhancer } from './redux';
 
 createReactEventProcessor();

packages/react/src/redux.ts

@@ -0,0 +1,83 @@
+// @flow
+import { configureScope } from '@sentry/minimal';
+import { Scope } from '@sentry/types';
+import { Action, AnyAction, PreloadedState, Reducer, StoreEnhancer, StoreEnhancerStoreCreator } from 'redux';
+
+export interface SentryEnhancerOptions {
+  /**
+   * Transforms the state before attaching it to an event.
+   * Use this to remove any private data before sending it to Sentry.
+   * Return null to not attach the state.
+   */
+  stateTransformer(state: any | undefined): any | null;
+  /**
+   * Transforms the action before sending it as a breadcrumb.
+   * Use this to remove any private data before sending it to Sentry.
+   * Return null to not send the breadcrumb.
+   */
+  actionTransformer(action: AnyAction): AnyAction | null;
+  /**
+   * Called on every state update, configure the Sentry Scope with the redux state.
+   */
+  configureScopeWithState?(scope: Scope, state: any): void;
+}
+
+const ACTION_BREADCRUMB_CATEGORY = 'redux.action';
+const ACTION_BREADCRUMB_TYPE = 'info';
+const STATE_CONTEXT_KEY = 'redux.state';
+
+const defaultOptions: SentryEnhancerOptions = {
+  actionTransformer: action => action,
+  // tslint:disable-next-line: no-unsafe-any
+  stateTransformer: state => state,
+};
+
+function createReduxEnhancer(enhancerOptions?: Partial<SentryEnhancerOptions>): StoreEnhancer {
+  const options = {
+    ...defaultOptions,
+    ...enhancerOptions,
+  };
+
+  return (next: StoreEnhancerStoreCreator): StoreEnhancerStoreCreator => <S = any, A extends Action = AnyAction>(
+    reducer: Reducer<S, A>,
+    initialState?: PreloadedState<S>,
+  ) => {
+    const sentryReducer: Reducer<S, A> = (state, action): S => {
+      const newState = reducer(state, action);
+
+      configureScope(scope => {
+        /* Action breadcrumbs */
+        const transformedAction = options.actionTransformer(action);
+        // tslint:disable-next-line: strict-type-predicates
+        if (typeof transformedAction !== 'undefined' && transformedAction !== null) {
+          scope.addBreadcrumb({
+            category: ACTION_BREADCRUMB_CATEGORY,
+            data: transformedAction,
+            type: ACTION_BREADCRUMB_TYPE,
+          });
+        }
+
+        /* Set latest state to scope */
+        const transformedState = options.stateTransformer(newState);
+        if (typeof transformedState !== 'undefined' && transformedState !== null) {
+          // tslint:disable-next-line: no-unsafe-any
+          scope.setContext(STATE_CONTEXT_KEY, transformedState);
+        } else {
+          scope.setContext(STATE_CONTEXT_KEY, null);
+        }
+
+        /* Allow user to configure scope with latest state */
+        const { configureScopeWithState } = options;
+        if (typeof configureScopeWithState === 'function') {
+          configureScopeWithState(scope, newState);
+        }
+      });
+
+      return newState;
+    };
+
+    return next(sentryReducer, initialState);
+  };
+}
+
+export { createReduxEnhancer };

packages/react/test/redux.test.ts

@@ -0,0 +1,230 @@
+// tslint:disable-next-line: no-implicit-dependencies
+import * as Sentry from '@sentry/minimal';
+import { Scope } from '@sentry/types';
+import * as Redux from 'redux';
+
+import { createReduxEnhancer } from '../src/redux';
+
+const mockAddBreadcrumb = jest.fn();
+const mockSetContext = jest.fn();
+
+jest.mock('@sentry/minimal', () => ({
+  configureScope: (callback: (scope: any) => Partial<Scope>) =>
+    callback({
+      addBreadcrumb: mockAddBreadcrumb,
+      setContext: mockSetContext,
+    }),
+}));
+
+afterEach(() => {
+  mockAddBreadcrumb.mockReset();
+  mockSetContext.mockReset();
+});
+
+describe('createReduxEnhancer', () => {
+  it('logs redux action as breadcrumb', () => {
+    const enhancer = createReduxEnhancer();
+
+    const initialState = {};
+
+    const store = Redux.createStore(() => initialState, enhancer);
+
+    const action = { type: 'TEST_ACTION' };
+    store.dispatch(action);
+
+    expect(mockAddBreadcrumb).toBeCalledWith({
+      category: 'redux.action',
+      data: action,
+      type: 'info',
+    });
+  });
+
+  it('sets latest state on to scope', () => {
+    const enhancer = createReduxEnhancer();
+
+    const initialState = {
+      value: 'initial',
+    };
+    const ACTION_TYPE = 'UPDATE_VALUE';
+
+    const store = Redux.createStore((state: object = initialState, action: { type: string; newValue: any }) => {
+      if (action.type === ACTION_TYPE) {
+        return {
+          ...state,
+          value: action.newValue,
+        };
+      }
+      return state;
+    }, enhancer);
+
+    const updateAction = { type: ACTION_TYPE, newValue: 'updated' };
+    store.dispatch(updateAction);
+
+    expect(mockSetContext).toBeCalledWith('redux.state', {
+      value: 'updated',
+    });
+  });
+
+  describe('transformers', () => {
+    it('transforms state', () => {
+      const enhancer = createReduxEnhancer({
+        stateTransformer: state => ({
+          ...state,
+          superSecret: 'REDACTED',
+        }),
+      });
+
+      const initialState = {
+        superSecret: 'SECRET!',
+        value: 123,
+      };
+
+      Redux.createStore((state = initialState) => state, enhancer);
+
+      expect(mockSetContext).toBeCalledWith('redux.state', {
+        superSecret: 'REDACTED',
+        value: 123,
+      });
+    });
+
+    it('clears state if transformer returns null', () => {
+      const enhancer = createReduxEnhancer({
+        stateTransformer: () => null,
+      });
+
+      const initialState = {
+        superSecret: 'SECRET!',
+        value: 123,
+      };
+
+      Redux.createStore((state = initialState) => state, enhancer);
+
+      // Check that state is cleared
+      expect(mockSetContext).toBeCalledWith('redux.state', null);
+    });
+
+    it('transforms actions', () => {
+      const ACTION_TYPES = {
+        SAFE: 'SAFE_ACTION',
+        SECRET: 'SUPER_SECRET_ACTION',
+      };
+
+      const enhancer = createReduxEnhancer({
+        actionTransformer: action => {
+          if (action.type === ACTION_TYPES.SECRET) {
+            return {
+              ...action,
+              secret: 'I love pizza',
+            };
+          }
+          return action;
+        },
+      });
+
+      const initialState = {};
+
+      const store = Redux.createStore(() => initialState, enhancer);
+
+      store.dispatch({
+        secret: 'The Nuclear Launch Code is: Pizza',
+        type: ACTION_TYPES.SECRET,
+      });
+
+      expect(mockAddBreadcrumb).toBeCalledWith({
+        category: 'redux.action',
+        data: {
+          secret: 'I love pizza',
+          type: ACTION_TYPES.SECRET,
+        },
+        type: 'info',
+      });
+
+      const safeAction = {
+        secret: 'Not really a secret am I',
+        type: ACTION_TYPES.SAFE,
+      };
+      store.dispatch(safeAction);
+
+      expect(mockAddBreadcrumb).toBeCalledWith({
+        category: 'redux.action',
+        data: safeAction,
+        type: 'info',
+      });
+
+      // first time is redux initialize
+      expect(mockAddBreadcrumb).toBeCalledTimes(3);
+    });
+
+    it("doesn't send action if transformer returns null", () => {
+      const enhancer = createReduxEnhancer({
+        actionTransformer: action => {
+          if (action.type === 'COCA_COLA_RECIPE') {
+            return null;
+          }
+          return action;
+        },
+      });
+
+      const initialState = {};
+
+      const store = Redux.createStore((state = initialState) => state, enhancer);
+
+      const safeAction = {
+        type: 'SAFE',
+      };
+      store.dispatch(safeAction);
+
+      const secretAction = {
+        cocaColaRecipe: {
+          everythingElse: '10ml',
+          sugar: '990ml',
+        },
+        type: 'COCA_COLA_RECIPE',
+      };
+      store.dispatch(secretAction);
+
+      // first time is redux initialize
+      expect(mockAddBreadcrumb).toBeCalledTimes(2);
+      expect(mockAddBreadcrumb).toBeCalledWith({
+        category: 'redux.action',
+        data: safeAction,
+        type: 'info',
+      });
+    });
+  });
+
+  it('configureScopeWithState is passed latest state', () => {
+    const configureScopeWithState = jest.fn();
+    const enhancer = createReduxEnhancer({
+      configureScopeWithState,
+    });
+
+    const initialState = {
+      value: 'outdated',
+    };
+
+    const UPDATE_VALUE = 'UPDATE_VALUE';
+
+    const store = Redux.createStore((state: object = initialState, action: { type: string; value: any }) => {
+      if (action.type === UPDATE_VALUE) {
+        return {
+          ...state,
+          value: action.value,
+        };
+      }
+      return state;
+    }, enhancer);
+
+    store.dispatch({
+      type: UPDATE_VALUE,
+      value: 'latest',
+    });
+
+    let scopeRef;
+    Sentry.configureScope(scope => (scopeRef = scope));
+
+    expect(configureScopeWithState).toBeCalledWith(scopeRef, {
+      value: 'latest',
+    });
+  });
+});