refactor: migrate to jest assertion

Author: alexander-akait

package-lock.json

@@ -58,8 +58,6 @@
     "babel-eslint": "10.1.0",
     "babel-loader": "9.2.1",
     "babel-plugin-lodash": "3.3.4",
-    "chai": "4.3.4",
-    "chai-subset": "1.6.0",
     "classnames": "2.3.1",
     "core-js": "3.12.1",
     "css-loader": "5.2.5",
@@ -84,7 +82,6 @@
     "postcss-loader": "5.3.0",
     "preact": "10.5.13",
     "puppeteer": "^24.30.0",
-    "stream-combiner2": "1.1.1",
     "style-loader": "2.0.0",
     "terser-webpack-plugin": "5.1.2",
     "url-loader": "4.1.1",

package.json

@@ -1,6 +1,3 @@
-const chai = require('chai');
-chai.use(require('chai-subset'));
-const {expect} = chai;
 const Logger = require('../lib/Logger');
 
 class TestLogger extends Logger {
@@ -32,12 +29,12 @@ describe('Logger', function () {
           if (Logger.levels.indexOf(level) >= Logger.levels.indexOf(testingLevel)) {
             it(`should log "${level}" message`, function () {
               logger[level]('msg1', 'msg2');
-              expect(logger.logs).to.deep.equal([[level, 'msg1', 'msg2']]);
+              expect(logger.logs).toEqual([[level, 'msg1', 'msg2']]);
             });
           } else {
             it(`should not log "${level}" message`, function () {
               logger[level]('msg1', 'msg2');
-              expect(logger.logs).to.be.empty;
+              expect(logger.logs).toHaveLength(0);
             });
           }
         }
@@ -59,11 +56,11 @@ describe('Logger', function () {
     });
 
     it('should throw if level is invalid on instance creation', function () {
-      expect(() => new TestLogger('invalid')).to.throw(invalidLogLevelMessage('invalid'));
+      expect(() => new TestLogger('invalid')).toThrow(invalidLogLevelMessage('invalid'));
     });
 
     it('should throw if level is invalid on `setLogLevel`', function () {
-      expect(() => new TestLogger().setLogLevel('invalid')).to.throw(invalidLogLevelMessage('invalid'));
+      expect(() => new TestLogger().setLogLevel('invalid')).toThrow(invalidLogLevelMessage('invalid'));
     });
   });
 });
@@ -81,7 +78,7 @@ function expectLoggerLevel(logger, level) {
     .filter(testLevel => Logger.levels.indexOf(testLevel) >= Logger.levels.indexOf(level))
     .map(testLevel => [testLevel, 'msg1', 'msg2']);
 
-  expect(logger.logs).to.deep.equal(expectedLogs);
+  expect(logger.logs).toEqual(expectedLogs);
 }
 
 function invalidLogLevelMessage(level) {