Running unit test under mocha returns TypeError: Cannot read property 'equal' of undefined

[karthik22061993]

it.only("should create mock logger", function() { const MockLogger = require('simple-node-logger').mocks.MockLogger; const log = MockLogger.createLogger('MyCategory'); log.info('this is a log statement'); log.getLogEntries().length.should.equal(0);

})

TypeError: Cannot read property 'equal' of undefined