Mission to make a calculator with React

Requirements

• The initial value of the calculation result is 0
• Addition is possible for two numbers
• subtraction is possible for two numbers
• multiplication is possible for two numbers
• Division of two numbers is possible
• Press the AC button to reset to 0
• When expressing calculation results, the decimal point is rounded down if it exceeds 5 decimal places.
• You can only enter up to 9 digits at a time.
• Comma processing when showing calculation results

Test requirements

Everything in the requirements must pass the test

How to run the test

Excute test script in package.json

Select component testing

In Chrome, select start component testing. Choosing a different browser is optional

And then select the test you wrote and run it

Example

PR request

Fork the repository and edit it in your repository

⚠

1. Consider whether a component has only one ‘role’ and ‘responsibility’, or whether a function does only one thing
2. Commits also try to keep SRP
3. Must write test code. However, the E2E test does not work currently due to a problem with the current version, so write it as a MOCK test.
4. Prettier is set, so enable it and write the code.

reference

• What is SRP? - https://brownbears.tistory.com/562
• @cypress/react https://github.com/cypress-io/cypress/tree/master/npm/react#readme
• Cypress guide https://docs.cypress.io/guides/overview/why-cypress