feat(redux): add action logger

Author: azu

package.json

@@ -59,6 +59,7 @@
     "node-fetch": "^1.3.2",
     "npm-run-all": "^1.2.8",
     "power-assert": "^1.0.0",
+    "redux": "^3.5.2",
     "remark": "^4.1.1",
     "stemming-x-keywords": "^1.0.3",
     "textlint": "^6.1.0",

src/redux/action-logger.js

@@ -0,0 +1,18 @@
+// LICENSE : MIT
+"use strict";
+const defaultOptions = {
+    // default: logger use console API
+    logger: console
+};
+/**
+ * create logger middleware
+ * @param {{logger: *}} options
+ * @returns {Function} middleware function
+ */
+export default function createLogger(options = defaultOptions) {
+    const logger = options.logger || defaultOptions.logger;
+    return store => next => action => {
+        logger.log(action);
+        return next(action);
+    };
+}

test/redux/action-logger-test.js

@@ -0,0 +1,32 @@
+// LICENSE : MIT
+"use strict";
+const assert = require("power-assert");
+import {createStore, applyMiddleware} from "redux";
+import createLogger from "../../src/redux/action-logger";
+const initialState = {};
+const reducer = (state = initialState, action) => state;
+
+describe("logger-test", function () {
+    let store, dispatch, logs;
+    beforeEach(() => {
+        logs = [];
+        const con = {
+            log(message){
+                logs.push(message);
+            }
+        };
+        const middleware = createLogger({
+            logger: con
+        });
+        store = applyMiddleware(middleware)(createStore)(reducer);
+        dispatch = store.dispatch;
+    });
+    afterEach(() => {
+        logs.length = 0;
+    });
+    it("should output log", function () {
+        const action = {type: "FOO"};
+        dispatch(action);
+        assert.deepEqual(logs, [action]);
+    });
+});