unit tests

More than any other testing framework, JUnit has driven developers to understand the usefulness of tests, especially of unit tests.

Though Bob starts with TDD, he seems to agree that to be a professional you need to have good unit tests.

Because unit tests execute so quickly, they are easy to run often as a part of a build.

Up until now, it was possible to run unit tests against your personal Twitter account without anybody knowing what you were up to.

So, you've got a nicely woven Maven project, and you'd like to test Jester on your unit tests (or at least on a group of tests).

Always try to run all unit tests once a day or once a week to make sure your latest code changes did not add new bugs or errors.

In some cases, the unit tests themselves may be changed by the refactoring, but the point is that this should happen automatically as well.

A suite of unit tests for an interface can also be viewed as a form of documentation for that interface.

As you'll see in just a moment, dealing with this injected log object when writing unit tests requires an extra step.

Alistair seems to agree that there is no discounting the fact that unit tests are important.

That said, the unit tests of Dojo almost all follow a common structure to make it simple for new module owners to pick up and run with it.

At the end, you said the hallmark of the professional is to have good unit tests, and TDD is one way of achieving that.

This book is one of their earlier publications and is a must-read for any Java programmer who wants to be good at writing unit tests.

Unit tests, executed by developers, allow you to identify and fix problems early on, which lowers both costs and project risks.

That said, it does not mean that there cannot be a test suite module file that loads all the unit tests for all modules.

Because the unit tests for an interface should also serve as documentation, it is essential that they be as easy to read as possible.

This project includes all the necessary components of a small project, like unit tests, persistent units, and a working screen.

Immersed in a BBM, the last thing you think of are classic unit tests.

You are in the middle of making a large set of changes, and you know that one of your unit tests will be broken for a while.

Your code did not crash for the sole reason that you did not run the unit tests before checking in.

Developers seem to think that having run the product through the Unit tests ensures that the product is well-tested and production ready.

If you write unit tests only using the Database Unit Test Designer, you might not be familiar with the concept of a test class.

Unit tests are part of every programming assignment and part of the project.

Whether or not you use Contract4J with your unit tests, thinking about the contract of your components will improve your designs.

If you think a piece of code is confusing, write unit tests for it.

Test-driven programming is letting programmer tests (or unit tests -- again, just a choice of terms) drive the code you write.

Given the importance of unit testing in the Ruby world, you would hope that the RDT makes it easy to run unit tests.

The Cactus framework is an extension of JUnit that enables you to run unit tests inside a container.

You can also open up the unit tests in the composite application editor to see how they were assembled.

Once you've written a few unit tests, you can always run them through an IDE, but you'll also want to run them as part of a build process.

As such, this design document is always up-to-date because the unit tests always have to pass.

XP teams integrate their code several times a day, after they get all the unit tests for the system to run.

Performance issues can emerge from unit tests, which leads me back to the code to see if I can make some improvements.

The NUnit application provides a framework for writing unit tests, as well as a graphical interface to run these tests and view the results.

Following the TDD pattern, we have continued to define our unit tests, as shown in Listing 6-25.

Whatever the reasons, you may decide that 100% coverage of unit tests is not appropriate, but you certainly expect it to be close to 100%.

This results in a lot of pain when trying to write unit tests, and longer term it greatly limits the flexibility.

The code change is committed (or checked in), and its unit tests become part of the integration suite.

On many Agile teams, all new code is covered by an automated unit test, and all unit tests are run every time a build is performed.

You all agree there is a fundamental value to unit tests, if only you could run them in a more agile manner.

For a while now I've been writing RSpec specifications to test Expectnation, rather than "traditional" Rails unit tests.

From the testing standpoint, any unit tests are always better than no unit tests, but some unit tests are better than others.

Unit tests make it easier to find and resolve problems early which can translate into huge savings over the life of a project.

Because these tests take longer to run than true unit tests, you may find that you can't run them all the time.

For example, OpenEJB allowed for an embedded container (and even an embedded database) to make it easy to write unit tests for your EJBs.

If I'm developing for long stretches of time without having written corresponding unit tests, I get the jitters.

If the check box is cleared and you do not specify fully qualified names in the scripts and unit tests, those references are not found.

Unit tests give me the confidence that my code works and that I can change it, at a moment's notice, without the fear of it breaking.

One way is to have a thorough set of unit tests for the code: the code should pass the tests both before and after refactoring.

You'd like any unit tests we write to be executed automatically as a part of the build.

Within the development environment, run unit tests to exercise all parts of your application that generate SQL.

Having an automated system build your code and run the unit tests can be a more reliable solution.

If you're like many programmers who aren't fond of commenting code, unit tests are a way of documenting your code behavior.

It is difficult to start by creating unit tests for existing code, but it is possible.

For unit tests, code that indicates these deployment items is written into the source code for the test, as an attribute.

Common unit tests, however, are of advantage when it is desirable to reuse abstract tests, as it is the case for various container tests.

Translate block comments at the beginning of methods describing what the method does into unit tests.

The tests also show one of the other best practices for writing unit tests; keep the tests as simple and small as possible.

If you run database unit tests now, the data generation plan populates the database one time, at the start of your test run.

Finally, test-driven development forces you to write unit tests as part of the normal process of writing an application.

Often, only the most dedicated developers will take the time to maintain all of their unit tests when faced with a tight deadline.

Most of our developers started writing unit tests as soon they had a software unit that could conceivably be tested.

I don't get too hung up about it, but I'd say if you're just starting out, think of unit tests as just writing a test case per class.

Introduces the concept of using Assert statements and T-SQL assertions in your database unit tests.

Lastly, unit tests provide you with a high degree of confidence, which translates into developer satisfaction.

Often a good debugging technique is to write focused unit tests around the area where the bug is.

To me, unit tests are fast running tests that typically test individual classes that don't have heavy external dependencies like databases.

But what if you want your metaprogramming to be more limited (especially important when writing unit tests)?

In order for unit tests to be useful, you need to be able to execute them very fast.

But, I feel like if a team really did have 100% code coverage of their unit tests, there'd be a couple of problems.

Unit tests represent the primary safety net that allows you to refactor your code base at will.

Don't kill yourself striving for 100% coverage of code with automated unit tests. But take a few minutes to increase your coverage by 1%.

And best of all , he already had a complete set of unit tests.

Without isolation and automation , database- driven unit tests can become a maintenance nightmare of sporadic failures and bad test data .

The build may break, or some unit tests may be excluded, so there's a real need to keep Eclipse and Maven metadata synchronized.

Luckily, I learned that pushing untested code into production didn't work; consequently, I began to write unit tests.

If you have a very simple project, writing unit tests for it may take time that would be better spent in just writing the project itself.

Writing a suite of maintainable, automated unit tests without a testing framework is virtually impossible.

Describes how, after you create your database unit tests, you run them to see the results.

That's what these unit tests are: a set of coded use cases that document what a class does, given a controlled set of inputs.

Unit tests constitute design documentation that evolves naturally with a system.

As part of your unit tests, you might generate test data by running an existing data generation plan.

This methodology requires that I write unit tests for every function I add, and that I maintain those tests.

Unit tests help engineers reduce the number of bugs, hours spent on debugging, and contribute to healthier, more stable software.

Moreover, you modify CruiseControl to only run your true unit tests on check-ins and component tests on an hourly basis.

As systems' complexities increase, and with so many tools at our disposal, there's little reason to not rely on unit tests.

Unit tests give developers confidence in their work; unfortunately, bad unit testing also gives confidence, often with disastrous results.

The quality of your unit tests also plays a critically important role in continuous integration.

Provides tips about how to troubleshoot issues that you might experience when you create and run unit tests for your database.

New menus and key combinations enable developers of unit tests to start test runs and select the tests to run more quickly.

New menus and key combinations enable developers of unit tests to start test runs and select the tests to run more quickly.

Now that the developers are doing rigorous work themselves with solid automated unit tests, the products I test are much more robust.

Unit tests allow you to make changes with confidence; if a change breaks something, this will be revealed by the tests.

This step is similar to running pre-deployment unit tests, except for the nature of the JUnit test cases to run.

This dependency injection model also enables unit tests to be run outside either a Java EE or OSGi runtime.

Load tests consist of a series of Web tests or unit tests which operate under multiple simulated users over a period of time.

Download PHPUnit and start adding unit tests for your PHP scripts you can use for testing upgrades.

Running unit tests on different workstations requires application servers where the containers can run.

Once open editions of the project and packages are created, the programming pair proceeds to create or modify unit tests and program code.

To test a Web service this way, you could generate unit tests, or you could write a unit test by hand and mark it with this attribute.

It has extensive unit tests (in part because I wrote it for a discussion of test-driven development).

Furthermore, developers ran their unit tests on a regular basis to make sure their periodic changes weren. t breaking the software.

If you do not have unit tests that verify the functionality of your custom JavaScript code, you should consider it.

Programming in a task-focused way makes it easier to run unit tests frequently.

Say that the team process requires that no code can be checked in unless there are unit tests accompanying them.

What's needed is for the JVM to be less deterministic, more "fuzzy" when doing unit tests.

Generate test data prior to running unit tests check box to apply a data generation plan to your database project before you run tests.

Written by Ivan Moore, Jester is an excellent tool that tests the unit tests that programmers and developers write.

In fact, I compiled my groovy unit tests into normal Java . class files and ran them as part of a Maven build.

With test-driven development (TDD), you use unit tests to help design your code.

Of course, any unit tests that run against the "just Java" code can be run to ensure quality.

Unit tests tell developers whether the system "works" at any point in time.

Utilising a set of unit tests, engineers can dramatically reduce number of bugs and the risk with untested code.

If you seek a way to perform consistent unit tests of developed code, JsUnit can be a useful framework.

To run these tests, you must define at least four Ant tasks: one for unit tests, another for component tests, and so on.

The majority of unit tests I came across tended to be in open source projects, and the disconnect has always bothered me.

This resembles Test Driven Development (TDD), where Unit tests are supposed to be written before the code.

That the build and unit tests can be run quickly and completely in the developer's environment.

You can specify settings in a run configuration that correspond to the attributes used by ASP. NET unit tests.

Small changes to the unit tests would require us to audit the code again to ensure that full coverage had been maintained.

You can use this embedded container to run unit tests without having to run an entire servlet container.

Unit tests are usually easy to code because they are not reliant on architectural dependencies, and they also run quickly.

You use publicize to help create unit tests that target private types.

Unit tests were a vital part of our development effort.

For each work branch, CI server automatically and continuously checks that it builds and passes all unit tests.

A few unit tests will be used to make sure that the menu and the basic game work.

Unit tests also give developers courage to refactor the code, because a test failure tells the developer immediately if something's broken.

Because its browser-based interface has access to the XMLHttpRequest object, the DOH can support asynchronous unit tests.

I created some unit tests for my task library to ensure tasks were being created properly and begun some test-driven refactoring.

This walkthrough leads you through the steps to create and customize unit tests, run them, and examine the test results.

To run unit tests inside the WebSphere sMash application, you need to add the zero. test module to the application.

What's more, unit tests can be written before the actual code under test is written -- hence the notion of test-first development.

Developers decide to automate unit tests for a number of reasons.

Traditionally, programmers have mainly relied on the xUnit family of testing frameworks to organize and execute unit tests.

This "commit" build consists of (hopefully) lightweight processes like compiling and running quick unit tests.

PyUnit comes built into the latest Python distributions and offers a structured method for building unit tests.

Who does not want a beautiful UI and a suite of clean, effective unit tests?

Good unit tests encourage loose coupling between units, a requirement to get the test running in a test harness.

When all the unit tests for a function pass, stop coding the function.

The fact that unit tests are so expressive certainly has advantages.

The earlier example assumes that the two unit tests are part of the same test class.

Provided that all the unit tests fail, I know that I am ready to begin writing the actual code.

While a load test can contain both Web tests and unit tests, this walkthrough focuses on a load test that contains a Web tests.

Indeed, unit tests not considered part of the normal build quickly become dated and useless.

When you add unit tests to a load test, you exercise the performance of non-Web based server components.

These frameworks provide a harness to develop unit tests for JavaScript functions that manipulate DOM elements on Web pages.

Sometimes teams have trouble starting new habits: writing unit tests, fix compiler warnings, not breaking the build.

Performing unit tests on your portlets before they're exposed publicly is a must.

Negative unit tests intentionally misuse the code and verify for robustness and appropriate error handling.

In a typical project, you would define additional unit tests to verify that all critical database objects are working correctly.

Unit tests facilitate continuous software testing; unlike manual tests, it's cheap to perform them repeatedly.

Unit tests are a great tool to catch regression after a deep refactoring process.

When all the unit tests for an entire module pass, stop coding the module.

Many developers use a variant of testing called test-after development (TAD), whereby you write the code and then write the unit tests.

Reviews should include compiler checking, unit tests, and documenting the design at the outset.

Overall, the unit tests run 2% faster with this form of regular expression.

You can create database unit tests to verify that your stored procedures, functions and triggers are working correctly.

The project contains a file that is named SampleUnitTest. Cs, which contains the code of a new test class for your database unit tests.

You can define unit tests to verify the behavior of your database objects.

Plus it takes into account the undeniable fact that if you don't write unit tests first, you never write them.

In addition to guarding correctness of the code, unit tests can help ensure the performance of your code doesn't degrade over time.

Contract4J's own unit tests in the distribution provide extensive examples of valid, as well as invalid, test expressions.

If you have ever tried to add unit tests to a system that was already working, you probably found that it wasn't much fun.

Because changes only occur upon construction, immutable classes make it trivial to write unit tests.

The best you can do to flush these errors out into the open is use a wide variety of data in your unit tests.

If you are running Windows Vista, you must run Visual Studio as an administrator to run ASP. NET unit tests.

In fact, unit tests are an excellent way to provide limited specification of these extra invariants.

By extracting the highlighting logic, you can write unit tests for it by calling methods on the HighlightUtil class.

A project's build process and unit tests can access your server's resources, including the network the server is connected to.

Examples include unit tests, print statements, and Python debugger (pdb, a command-line debugger).

Describes the order in which T-SQL scripts are run before, during, and after database unit tests.

As with public methods, unit tests for private methods are created automatically when you generate tests from the code you want to test.

The Unit Testing Framework provides numerous additional Assert classes and other classes that give you flexibility in writing unit tests.

Unit tests verify the correct implementation of a unit of code.

A common metric for determining how good a set of unit tests are is code coverage.

Did you procrastinate yesterday and skip writing the unit tests for your new features?

Put the unit tests in the same package as the associated classes being tested.

Unit tests should be performed in Application Developer's test environment.

It should distinguish between unit tests and other tests, like load or stress tests. That will let different tests run at different times.

Unlike the unit tests, these English descriptions leave many things open for interpretation.

We designed some unit tests that would run overnight to identify any heap or stability problems.

In the Project 'TestProject' configuration dialog box, select the Use a secondary connection to validate unit tests check box.

Unit tests often need to test nuanced behavior of the code under test, leading to similar and duplicated situations.

Newly generated unit tests contain "To-do" comments that suggest changes to make.

Once you've created unit tests that exhaustively exercise the target code, you aren't done writing tests, however.

You have database unit tests that do not use fully qualified names and those tests reference objects in other schemas or databases.

For unit tests, this is the assembly that contains test code, not the assembly that contains the code of the application you are testing.

you would write the unit tests , run them , and see that they fail.

Generate unit tests against the Web service in the standard way for generating unit tests.

The add-in automates many of the debugging tasks and calls the IfxQuery tool to run unit tests for DataBlade module routines.

Since ZCML is not executed for unit tests, we have to do it manually here.

For unit tests, the source code editor opens with the appropriate function highlighted.

You already learned about static unit tests in the last chapter.

As your system expands, so does the body of unit tests.

Even though I haven't shown the unit tests for previous versions, all the examples have tests.

These tests can be unit tests, integration tests, or system tests.

Remember: Unit tests are meant to run in complete isolation.

Another increasingly common practice is to write unit tests and run them as part of the build.

Do different database unit tests need to access different database connections for test execution or test validation?

Just remember to not break the policy of the work branch (unit tests pass and whatnot).

Unit tests were always performed (and results logged) before code was distributed for review.

If you run unit tests whenever you make changes to code, you'll find out immediately if your changes broke something.

This means that you can use it in any number of different circumstances: unit tests, production code, and so on.

Using unit tests, you can test not only public methods but private methods as well.

In larger companies, management often pushes back when they find developers doing automated unit tests.

Unit tests must be managed as first-class application code.

The cmislib distribution includes unit tests simply as a development best practice.

A popular technique for simplifying unit tests is to create mock objects that are used just in the tests.

When you perform unit tests in combination with using Data Generator , you can test for predictable results .

These aren't as good as unit tests because they don't verify each little piece of behavior, but they are better than nothing.

This folder contains the test project you created in the procedures for creating and running unit tests.

Individual methods that are part of the mystringTest class form unit tests in the test suite.

A test framework for using JUnit to write unit tests for your client application.

Even if you choose to edit code in another program, you can use Zend Studio to debug classes, methods, and unit tests.

The unit tests at the base of the pyramid are important for several reasons.

Generating tests from this sample produces unit tests on two properties, three public methods, one private method, and one class.

So, it turns out that your suite of unit tests is really a suite of unit tests, component tests, and system tests.

illustrationProgrammers today recognize, more than ever, their responsibility for producing well-written unit tests.

You will still want to use JUnit to create unit tests for logic that are called without a Web harness.

Should developers strive for 100% code coverage with their unit tests, and if so, does that mean we no longer need dedicated QA testers?

If you use fully qualified names in your unit tests, the refactoring engine can update them whenever you rename a schema object.

As Figure 3 shows, it is a good practice to have each dojo module contain unit tests for just that module.

Listing 2 is a snippet of an Ant script that demonstrates the junit task to execute a batch of unit tests.

The Team System testing tools use naming conventions when it generates unit tests.

On the downside, individual unit tests offer somewhat limited code coverage.

You specify data in a fixture, and tell Rails to load the data when you run the unit tests.

If you used the project from Walkthrough: Creating and Running Unit Tests, the solution's name is Bank.

For all unit tests within a single test class, this is always the case.

Unit tests are particularly helpful when doing large refactorings.

We want our unit tests to be simple and execute quickly.

The unit tests that are created using the BOOST_TEST_CASE macros accept function pointers as their input arguments.

When you're dealing with simple data or service objects, writing unit tests is straightforward.

This gives developers more options to customize their unit tests correctly.

These tests complement the unit tests that your software developers create.

By default, references in unit tests and scripts are not updated automatically.

Categorization is key to avoiding the dreaded three-hour build that runs all "unit tests. "

The generation of unit tests for generic types and generic methods has limitations.

database unit tests, you can specify a different data generation plan for each test project.

At this point we should have a working field, but let's write some unit tests to verify the implementation.

With or without Assert statements, unit tests can generate code coverage data.

Pray, child, where are the unit tests for this class?

You can create web tests and unit tests and run them together under load across multiple machines.

But unit tests can be thorough enough that we can reasonably expect them to catch most violations of the invariants.

The developers often focused on error conditions in their tests, whereas unit tests should test several aspects of software.

Sometimes you will make a change to your code that, somehow, breaks 10% of your unit tests.

Another specification that a programmer can provide for an interface is a suite of unit tests.

You can combine Web tests with unit tests in a load test, when appropriate in your test plans.

The test cases in Listings 5 and 6 do not handle every detail, as the unit tests in Part 1 did.

I discussed composed method in " Test-driven design, Part 1, " in the context of writing unit tests before you write actual code.

It places unit testing in the context of TDD and give the reader all of the tools needs to write, manage, and automate great unit tests.