java - How to write a Unit Test? - Stack Overflow
So part of what testing is about actually begins before you write even one line of the SUT. The testing technique of Test Driven Development (TDD) takes that idea to an extreme, and has you create the unit testing code before you write the code to be tested. Unit testing frameworks test your SUT using assertions.
What is unit testing and how do you do it? - Stack Overflow
2009年3月16日 · What is unit testing? Unit testing simply verifies that individual units of code (mostly functions) work as expected. Usually you write the test cases yourself, but some can be automatically generated. The output from a test can be as simple as a console output, to a "green light" in a GUI such as NUnit, or a different language-specific framework.
java - How to do unit test for Exceptions? - Stack Overflow
2010年7月22日 · Now to unit test this, you create a "mock" implementation of the ILocalDetails interface whose getLocalHost() method throws the exception you want under the appropriate conditions. Then you create a unit text for SomeClass.getServerName() , arranging that the instance of SomeClass uses an instance of your "mock" class instead of the normal one.
java - Checking the results of a Factory in a unit test - Stack Overflow
While integration testing is important, it is not the same thing. In unit testing, you only need to test the object itself. If you assert on the concrete type of the abstract objects returned, you are testing over the implementation of the returned object. Unit Testing on Objects in general. When unit testing, there are four things, you want to ...
java - Singleton and unit testing - Stack Overflow
The Effective Java has the following statement on unit testing singletons Making a class a singleton can make it difficult to test its clients, as it’s impossible to substitute a mock implementation for a singleton unless it implements an interface that serves as its type.
java - How to unit test a method that reads a given file - Stack …
Mocking java.io.File is a bad idea as it has loads of native stuff. I would advice you to ensure that a minimalist text file is available in classpath when the unit tests are run. I would advice you to ensure that a minimalist text file is available in classpath when the unit tests are run.
java - Mockito : how to verify method was called on an object …
Testing only the public API is fine, until there are genuine bugs with side-effects that need tests. For example, checking that a private method is closing its HTTP connections properly is overkill until you discover that the private method is not closing its connections properly, and is thus causing a massive problem.
java - How can I unit test void functions? - Stack Overflow
Partial Mocking with plain Java Create a class (MockElephant) that extends from elephant, overwrite makeNoise so it counts the number of invocations. Use that class in your test to check that makeNoise was called the correct number of times
java - How to unit test constructors - Stack Overflow
Constructor testing is a test of the fact of initialization. That is, verification that the object's fields were initialized by the values passed to the constructor. And this can only be verified by reflection.
java - JPA Entity must be unit tested and how? - Stack Overflow
2015年9月7日 · On domain entities, it's clear that you should test every coded behaviour. Testing domain entities behaviour wouldn't be different from unit testing whatever type of function/method. Often you declare a test suite for each aggregate root and you check that invariants are correctly applied and mutations happen in the expected way.