20 Google Test Interview Questions and Answers
Prepare for the types of questions you are likely to be asked when interviewing for a position where Google Test will be used.
Google Test is a popular testing tool for software development. It is used to test C++ and Java programs. If you are applying for a position that requires knowledge of Google Test, you should be prepared to answer questions about it during your interview. In this article, we will review some of the most common Google Test questions and how you can answer them.
Google Test Interview Questions and Answers
Here are 20 commonly asked Google Test interview questions and answers to prepare you for your interview:
1. What is Google Test?
Google Test is a testing framework for C++ that allows you to write unit tests for your code. It is open source and is released under the Apache License.
2. Can you explain the architecture of Google Test?
Google Test is a C++ testing framework that helps you write better tests and automate testing processes. The framework is designed with a set of principles in mind, including simplicity, flexibility, and extensibility. Google Test is made up of two parts: the Google Test framework itself, and the Google Test Adapter, which is a Visual Studio extension that allows you to run Google Test tests within the Visual Studio IDE.
3. What are some important features of Google Test?
Google Test is a powerful testing tool that can be used to test C++ code. Some important features include the ability to create tests that are self-checking, to automatically run tests in parallel, and to generate test reports.
4. What are fixtures in context with Google Test?
Fixtures are a way to provide a set of common data or setup code for all tests in a test suite. This can be helpful in reducing duplication and making sure that all tests start from the same known state.
5. How can you run a single test case or group of tests by specifying their names?
You can use the –gtest_filter=
6. How do you use assertions to check if your code behaves as expected?
Assertions are a way of checking if your code is behaving as expected. You can use assertions to check if a certain condition is true, or if a certain value is equal to another value. Assertions are a valuable tool for debugging code, and can help you to find and fix bugs in your code.
7. How does Google Test handle multiple threads during execution?
Google Test automatically detects and handles multiple threads during execution. There is no need to do anything special in your code to take advantage of this feature.
8. Is it possible to perform data-driven testing using Google Test? If yes, then how?
Yes, it is possible to perform data-driven testing using Google Test. This can be done by using the Google Test framework to create a test fixture that contains the data that you want to use for your tests. The test fixture can then be used to run your tests and provide the data that they need.
9. What’s the difference between BDD and TDD testing techniques? Which one would you recommend for testing large applications?
BDD, or behavior-driven development, is a testing technique that focuses on the behavior of an application rather than its implementation details. This makes it well-suited for testing large applications, as it can be used to test an application at a high level without getting bogged down in the details. TDD, or test-driven development, is a technique that focuses on writing tests before code is written. This can be helpful in ensuring that code is written to meet the requirements of the tests, but can be more time-consuming and may not be as effective for testing large applications.
10. How can you write and execute parametrized tests using Google Test?
You can write parametrized tests using Google Test by creating a test fixture class template and then instantiating it with the desired types. You can execute parametrized tests by using the RUN_ALL_TESTS() macro.
11. How can you generate test reports after executing a series of tests using Google Test?
Google Test can generate XML-based test reports after tests have been executed. These reports can be used to track test results and to identify areas where improvements need to be made.
12. What are predefined macros used in Google Test?
Google Test defines a number of predefined macros that can be used to control how tests are run. For example, the macro GTEST_FLAG(filter) can be used to specify which tests should be run. Other macros can be used to control how tests are reported, whether or not they should be run in parallel, and so on.
13. How will you deal with exceptions thrown while executing a test using Google Test?
Google Test has an ASSERT_THROW() macro that can be used to test whether an exception is thrown.
14. What is the purpose of using ASSERT_EQ instead of ASSERT_TRUE? When should each be used?
ASSERT_EQ is used to compare two values for equality, while ASSERT_TRUE simply checks that a value is true. You would use ASSERT_EQ when you want to test that two specific values are equal, and ASSERT_TRUE when you want to test that a value is true (for example, when testing the return value of a function).
15. What happens when we disable an assertion in our code?
When we disable an assertion in our code, the code will continue to run as if the assertion was never there. This can be useful for debugging purposes, but it can also lead to undefined behavior if the assertion was disabled for a reason.
16. Why should we avoid including copyrighted material into our unit test suite?
There are a few reasons why it is generally advisable to avoid including copyrighted material in your unit test suite. First, it can be a violation of copyright law to do so without the permission of the copyright holder. Second, even if you do have permission, it can be a hassle to keep track of which files you are allowed to use and which you are not. Finally, it can be difficult to ensure that the copyrighted material you are using is actually representative of the real-world data that your code will be processing, which can lead to inaccurate tests.
17. What are the main differences between MSTest, NUnit, and Google Test?
MSTest and NUnit are both unit testing frameworks for .NET, while Google Test is a unit testing framework for C++. MSTest is the testing framework that is included with Visual Studio, while NUnit is a popular open-source alternative. Google Test is designed to be more user-friendly than either of the other two frameworks, with a more intuitive API and better support for advanced features such as death tests and parameterized tests.
18. What is the best way to find out the number of times a function was called from another function within the same file?
The best way to do this would be to use the Google Test framework. You can create a test case that specifically calls the function you are interested in, and then use the Google Test framework to check how many times the function was called.
19. What are the steps involved in setting up Google Test on my machine?
The first step is to download the Google Test library from its website. Once you have the library, you need to compile it and link it with your project. Finally, you need to write your own tests and include them in your project.
20. What are some real world examples of where Google Test has been used?
Google Test has been used in a variety of real world applications, including testing the software that runs on the Mars rover, testing Google’s own products like Chrome and Android, and testing software for a variety of other companies.