unit test what to test

Test the common case of everything you can. This will tell you when that code breaks after you make some change (which is, in my opinion, the single greatest benefit of automated unit testing). Test the edge cases of a few unusually complex code that you think will probably have errors.

1. What should be tested in unit testing?
2. What are the basic requirements for the unit testing?
3. What should not be unit tested?
4. What are the characteristics of a good unit test?
5. What is unit testing with example?
6. Why unit testing is bad?
7. How do you create a good unit test?
8. How do you write test cases?
9. How do you write unit tests for code?
10. How much unit testing is enough?
11. How much time does unit testing take?
12. How do you write a good Junit test?

What should be tested in unit testing?

The most important thing about a unit test is to explain and show the behavior and logic of the tested component. Some of the developers have the practice to use tests instead of documentation. Good unit tests should be reproducible and independent from external factors such as the environment or running order.

What are the basic requirements for the unit testing?

A Unit test should be written to verify a single unit of code and not the integration. Small and isolated Unit tests with clear naming would make it very easy to write and maintain. Changing another part of the software should not affect the Unit test if those are isolated and written for a specific unit of code.

What should not be unit tested?

You shouldn't write unit tests for other people's code (such as a framework you are using). You should only write tests for your code. Mock out dependencies on other people's code so that you only need to write tests for yours.

What are the characteristics of a good unit test?

Characteristics of a good unit test

• Fast. It is not uncommon for mature projects to have thousands of unit tests. ...
• Isolated. Unit tests are standalone, can be run in isolation, and have no dependencies on any outside factors such as a file system or database.
• Repeatable. ...
• Self-Checking. ...
• Timely.

What is unit testing with example?

UNIT TESTING is a type of software testing where individual units or components of a software are tested. The purpose is to validate that each unit of the software code performs as expected. Unit Testing is done during the development (coding phase) of an application by the developers.

Why unit testing is bad?

The problem with unit testing is that it requires a behavioral change, and it is very hard to change people's behavior. With words, you will get a lot of people to agree with you, but you won't see many changes in the way they do things. You have to convince people by doing.

How do you create a good unit test?

Let's get started.

1. Make Them Short. ...
2. Don't Repeat Yourself. ...
3. Prefer Composition Over Inheritance. ...
4. Make Them Fast. ...
5. Make Them Deterministic. ...
6. Don't Ignore Tests. ...
7. Test Your Tests. ...
8. Name Your Tests Well.

How do you write test cases?

Best Practice for writing good Test Case Example.

1. Test Cases need to be simple and transparent: ...
2. Create Test Case with End User in Mind. ...
3. Avoid test case repetition. ...
4. Do not Assume. ...
5. Ensure 100% Coverage. ...
6. Test Cases must be identifiable. ...
7. Implement Testing Techniques. ...
8. Peer Review.

How do you write unit tests for code?

1. 13 Tips for Writing Useful Unit Tests. ...
2. Test One Thing at a Time in Isolation. ...
3. Follow the AAA Rule: Arrange, Act, Assert. ...
4. Write Simple “Fastball-Down-the-Middle” Tests First. ...
5. Test Across Boundaries. ...
6. If You Can, Test the Entire Spectrum. ...
7. If Possible, Cover Every Code Path. ...
8. Write Tests That Reveal a Bug, Then Fix It.

How much unit testing is enough?

Code coverage of 70-80% is a reasonable goal for system test of most projects with most coverage metrics. Use a higher goal for projects specifically organized for high testability or that have high failure costs. Minimum code coverage for unit testing can be 10-20% higher than for system testing.

How much time does unit testing take?

Typical time budgeted on writing unit tests is about 1 day for every feature that takes 3-4 days of heads down coding. But that can vary with a lot of factors.

How do you write a good Junit test?

Tips for writing great unit tests

1. Test only one code unit at a time. ...
2. Don't make unnecessary assertions. ...
3. Make each test independent of all the others. ...
4. Mock out all external services and state. ...
5. Don't unit-test configuration settings. ...
6. Name your unit tests clearly and consistently.