Logger & LoggerMiddleware

packages/logger/.gitignore

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+/node_modules/
+/build/
+/coverage/
+/docs/
+*.tgz
+*.log
+package-lock.json

packages/logger/.npmignore

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+/src/
+/coverage/
+/docs/
+tsconfig.test.json
+
+*.spec.js
+*.spec.d.ts
+*.spec.js.map
+
+*.mock.js
+*.mock.d.ts
+*.mock.js.map
+
+*.fixture.js
+*.fixture.d.ts
+*.fixture.js.map

packages/logger/LICENSE

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packages/logger/README.md

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+# logger

packages/logger/package.json

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+{
+    "name": "@aws/logger",
+    "version": "0.0.1",
+    "dependencies": {
+        "@aws/types": "^0.0.1"
+    },
+    "devDependencies": {
+        "@types/node": "^7.0.12",
+        "@types/jest": "^20.0.2",
+        "jest": "^20.0.4",
+        "typescript": "^2.3"
+    },
+    "scripts": {
+        "prepublishOnly": "tsc",
+        "pretest": "tsc -p tsconfig.test.json",
+        "test": "jest"
+    },
+    "main": "./build/index.js",
+    "types": "./build/index.d.ts",
+    "author": "[email protected]",
+    "license": "Apache-2.0"
+}

packages/logger/src/index.spec.ts

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+import {Logger} from './'
+import {
+    LoggerOptions,
+    LogLevel,
+    Logger as LoggerInterface
+} from '@aws/types'
+
+describe('Logger', () => { 
+    describe('all levels (by default)', () => {
+        let mockConsole: any;
+        let logger: LoggerInterface;
+        beforeEach(() => {
+            mockConsole = {
+                log: jest.fn(() => {}),
+                error: jest.fn(() => {}),
+                info: jest.fn(() => {}),
+                warn: jest.fn(() => {})
+            };
+            logger = new Logger({logger: mockConsole});
+        })
+        it('should only log', () => {
+            logger.log('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(1);
+            expect(mockConsole.error.mock.calls.length).toEqual(0);
+            expect(mockConsole.info.mock.calls.length).toEqual(0);
+            expect(mockConsole.warn.mock.calls.length).toEqual(0);
+            expect(mockConsole.log.mock.calls[0][0]).toEqual('hello world');
+        });
+
+        it('should only error', () => {
+            logger.error('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(0);
+            expect(mockConsole.error.mock.calls.length).toEqual(1);
+            expect(mockConsole.info.mock.calls.length).toEqual(0);
+            expect(mockConsole.warn.mock.calls.length).toEqual(0);
+            expect(mockConsole.error.mock.calls[0][0]).toEqual('hello world');
+        });
+
+        it('should only info', () => {
+            logger.info('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(0);
+            expect(mockConsole.error.mock.calls.length).toEqual(0);
+            expect(mockConsole.info.mock.calls.length).toEqual(1);
+            expect(mockConsole.warn.mock.calls.length).toEqual(0);
+            expect(mockConsole.info.mock.calls[0][0]).toEqual('hello world');
+        });
+
+        it('should only warn', () => {
+            logger.warn('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(0);
+            expect(mockConsole.error.mock.calls.length).toEqual(0);
+            expect(mockConsole.info.mock.calls.length).toEqual(0);
+            expect(mockConsole.warn.mock.calls.length).toEqual(1);
+            expect(mockConsole.warn.mock.calls[0][0]).toEqual('hello world');
+        });
+    })
+
+    describe('set a logLevel', () => {
+        let mockConsole: any;
+        let params: LoggerOptions;
+        beforeEach(() => {
+            mockConsole = {
+                log: jest.fn(() => {}),
+                error: jest.fn(() => {}),
+                info: jest.fn(() => {}),
+                warn: jest.fn(() => {})
+            };
+            params = {
+                logger: mockConsole,
+            }
+        })
+
+        it('should print info, warn and error', () => {
+            params.logLevel = 'info';
+            const logger = new Logger(params);
+            logger.log('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(0);
+            for (const logLevel of ['error', 'warn', 'info']) {
+                (logger as any)[logLevel]('hello world');
+                expect(mockConsole[logLevel].mock.calls.length).toEqual(1);
+                expect(mockConsole[logLevel].mock.calls[0][0]).toEqual('hello world');
+            }
+        });
+
+        it('should print warn and error', () => {
+            params.logLevel = 'warn';
+            const logger = new Logger(params);
+            logger.log('hello world');
+            expect(mockConsole.log.mock.calls.length).toEqual(0);
+            logger.info('hello world');
+            expect(mockConsole.info.mock.calls.length).toEqual(0);
+            logger.warn('hello world');
+            expect(mockConsole.warn.mock.calls.length).toEqual(1);
+            expect(mockConsole.warn.mock.calls[0][0]).toEqual('hello world');
+            logger.error('hello world');
+            expect(mockConsole.error.mock.calls.length).toEqual(1);
+            expect(mockConsole.error.mock.calls[0][0]).toEqual('hello world');
+        });
+
+        it('should print only error', () => {
+            params.logLevel = 'error';
+            const logger = new Logger(params);
+            logger.error('hello world');
+            expect(mockConsole.error.mock.calls.length).toEqual(1);
+            expect(mockConsole.error.mock.calls[0][0]).toEqual('hello world');
+            for (const logLevel of ['warn', 'info', 'log']) {
+                (logger as any)[logLevel]('hello world');
+                expect(mockConsole[logLevel].mock.calls.length).toEqual(0);
+            }
+        });
+
+        it('should print nothing', () => {
+            params.logLevel = 'off';
+            const logger = new Logger(params);
+            for (const logLevel of ['error', 'info', 'warn', 'log']) {
+                (logger as any)[logLevel]('hello world');
+                expect(mockConsole[logLevel].mock.calls.length).toEqual(0);
+            }
+        });
+    })
+
+
+})