test: add cases for Logger class

tests/calculator.test.js → tests/Calculator.test.js

@@ -1,6 +1,6 @@
 /* globals describe it expect */
 
-import { Calculator } from '../src/calculator'
+import Calculator from '@yant/Calculator'
 
 describe('Calculator:', () => {
   it('Should sum two values', () => {

tests/Logger.test.js

@@ -0,0 +1,40 @@
+/* globals jest describe it expect */
+
+import Logger from '@yant/lib/Logger'
+
+describe('Logger:', () => {
+  it('Should work with default config', () => {
+    const raise = jest.fn()
+
+    try {
+      const logger = new Logger()
+      logger.info('info message')
+      logger.warn('warn message')
+      logger.error('error message')
+    } catch (e) {
+      raise()
+    }
+
+    expect(raise).not.toHaveBeenCalled()
+  })
+
+  it('Should work with custom config', () => {
+    const raise = jest.fn()
+
+    try {
+      const devLogger = new Logger({ isDev: true })
+      devLogger.info('info message')
+      devLogger.warn('warn message')
+      devLogger.error('error message')
+
+      const prodLogger = new Logger({ isDev: false, label: 'jest' })
+      prodLogger.info('info message')
+      prodLogger.warn('warn message')
+      prodLogger.error('error message')
+    } catch (e) {
+      raise()
+    }
+
+    expect(raise).not.toHaveBeenCalled()
+  })
+})