Note: In case of multiple config locations, later bean definitions will override ones defined in earlier loaded files. This can be leveraged to deliberately override certain bean definitions via an extra XML file.
This is a simple, one-stop shop convenience ApplicationContext. Create a new ClassPathXmlApplicationContext with the given parent, loading the definitions from the given XML files and automatically refreshing the context. This is a convenience method to load class path resources relative to a given Class. Improve this answer. Prepending with file: forces the use of qualified uri's, but then that causes the problem where files referenced in the config file cannot be found. Alex Alex 7, 5 5 gold badges 48 48 silver badges 74 74 bronze badges.
Mr Lou Mr Lou 1, 19 19 silver badges 17 17 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Visit chat. Related Hot Network Questions. And we have tested to ensure that we will get exactly those values.
So we can have confidence that it is right. A good second step would be to select one of the values, and to ensure that the Presenter asks the Model for the correctly filtered data, and that the Presenter passes this filtered data to the View. This pushes us to implement most of the code that the Presenter class needs, except for a lookup of the selected value, to determine what to send to the Model :.
We interact with the View and Model objects to produce the desired result, but we currently ignore the currently selected value in the view's drop-down and send a hard-coded "A" value to the model. This is intentional; we do not want to write code that is inadequately tested. And we do not yet have tests for searching for anything other than an "A" value.
We will write more tests in a moment, but first we will ensure that the existing code and tests are as readable and maintainable as possible. There it too much "setup" code: I notice that this test is doing several things that the previous test did. And I expect that most of the other tests will have to create and initialize the same objects, just as these two tests did.
So I will refactor the tests to make them more readable:. These changes make the current tests shorter and more readable. And this change will benefit the next few tests as well.
Remembering that the Presenter is hard-coding the value that it sends to the Model , rather than doing something sensible based on the user-selected value, I say that we should write a test to force us to implement better production code, and to ensure that this new code is properly tested:. This provides us with sufficient reason to finish the implementation of the searchButtonPressed method, by adding a second array field with the values to send to the Model for each of the drop-down values the user might select in the View :.
But we are still not finished: We need to properly handle the "- ALL -" case, which should return all the values in the database, unfiltered:. A java. As a final touch, just to ensure that the system is robust in the face of unexpected errors, I will add a test to ensure that unexpected RuntimeException objects are handled well:.
We have verified that the Presenter class coordinates the actions of the application's View and Model. For the next step, we will move forward with testing and implementing a Model class for this application:. As before, we elect to hard-code a value "valueA" to make this test pass, knowing that we need to add more tests to justify and fully test the intended final implementation. Because of the way the data is structured in this implementation, searching for all records "of type A" can most easily and simply be done by finding all records that end with the string value "A".
As before, we notice a fair amount of duplication between the tests, so we refactor it out to setUp and tearDown methods, and the appropriate fields:. Putting all the EasyMock setup logic in the setUp method simplifies these tests, and makes writing new tests easier, as we will soon see We want to ensure that the model performs properly when given invalid values, so we write a test for this:.
Likewise, we need to provide a way to search for all records without filtering them. And we notice that the easiest way to do this is to pass an empty string as the search criteria, as all strings end with the empty string:.
At this point we see that the Model object passes all of our tests, and I am satisfied that this is a good implementation, so we can move on to the other components of the system. We have even tested that both properly handle boundary conditions, bad data, and exceptions. So we can reasonably have confidence that when we integrate these components with the Graphical User Interface GUI , it will work well. We would like to integrate this application using the Dependency Injection functionality of the Spring Library.
So we will start with a simple and direct Java class that ensures that the system is running on the Swing GUI thread, as required by Swing:. Running this reveals that we need a client. View class. The tools required to do automated testing of Swing components are beyond the scope of this article, so we will just write the code and test it by hand:. This almost works -- except that we need a server.
Database class. In a real application, this class would use a relational database, web services, or some other form of storage. But for this example application we will implement the simplest possible internal "database," as shown below:.
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