unit-testing – Page 178

How to run JUnit test cases from the command line

September 22, 2022 by Tarik

For JUnit 5.x it’s: java -jar junit-platform-console-standalone-<version>.jar <Options> Find a brief summary at https://stackoverflow.com/a/52373592/1431016 and full details at https://junit.org/junit5/docs/current/user-guide/#running-tests-console-launcher For JUnit 4.X it’s really: java -cp .:/usr/share/java/junit.jar org.junit.runner.JUnitCore [test class name] But if you are using JUnit 3.X note the class name is different: java -cp .:/usr/share/java/junit.jar junit.textui.TestRunner [test class name] You might need to … Read more

Unit testing private methods in C#

September 22, 2022 by Tarik

You can use the PrivateObject class: Class target = new Class(); PrivateObject obj = new PrivateObject(target); var retVal = obj.Invoke(“PrivateMethod”); Assert.AreEqual(expectedVal, retVal); Note: PrivateObject and PrivateType are not available for projects targeting netcoreapp2.0 – GitHub Issue 366

Should I test private methods or only public ones? [closed]

September 22, 2022 by Tarik

I do not unit test private methods. A private method is an implementation detail that should be hidden to the users of the class. Testing private methods breaks encapsulation. If I find that the private method is huge or complex or important enough to require its own tests, I just put it in another class … Read more

What’s the best strategy for unit-testing database-driven applications?

September 22, 2022 by Tarik

I’ve actually used your first approach with quite some success, but in a slightly different ways that I think would solve some of your problems: Keep the entire schema and scripts for creating it in source control so that anyone can create the current database schema after a check out. In addition, keep sample data … Read more

How to test the type of a thrown exception in Jest

September 21, 2022 by Tarik

In Jest you have to pass a function into expect(function).toThrow(<blank or type of error>). Example: test(“Test description”, () => { const t = () => { throw new TypeError(); }; expect(t).toThrow(TypeError); }); Or if you also want to check for error message: test(“Test description”, () => { const t = () => { throw new … Read more

Conditionally ignoring tests in JUnit 4

September 21, 2022 by Tarik

The JUnit way is to do this at run-time is org.junit.Assume. @Before public void beforeMethod() { org.junit.Assume.assumeTrue(someCondition()); // rest of setup. } You can do it in a @Before method or in the test itself, but not in an @After method. If you do it in the test itself, your @Before method will get run. … Read more

NUnit vs. MbUnit vs. MSTest vs. xUnit.net [closed]

September 21, 2022 by Tarik

I know this is an old thread, but I thought I’d post a vote for xUnit.NET. While most of the other testing frameworks mentioned are all pretty much the same, xUnit.NET has taken a pretty unique, modern, and flexible approach to unit testing. It changes terminology, so you no longer define TestFixtures and Tests…you specify … Read more

What does “DAMP not DRY” mean when talking about unit tests?

September 20, 2022 by Tarik

It’s a balance, not a contradiction DAMP and DRY are not contradictory, rather they balance two different aspects of a code’s maintainability. Maintainable code (code that is easy to change) is the ultimate goal here. DAMP (Descriptive And Meaningful Phrases) promotes the readability of the code. To maintain code, you first need to understand the … Read more

What’s the difference between unit tests and integration tests? [duplicate]

September 19, 2022 by Tarik

A unit test is a test written by the programmer to verify that a relatively small piece of code is doing what it is intended to do. They are narrow in scope, they should be easy to write and execute, and their effectiveness depends on what the programmer considers to be useful. The tests are … Read more

How to print to console in pytest?

September 19, 2022 by Tarik

By default, py.test captures the result of standard out so that it can control how it prints it out. If it didn’t do this, it would spew out a lot of text without the context of what test printed that text. However, if a test fails, it will include a section in the resulting report … Read more