The First Feature
The First Feature
The first and highest priority feature that we need to implement involves accessing our database from
The different aspects of the Web service implementation are detailed in Chapters 5, 6, and 7. Chapter 5, Programmer Tests: Using TDD with ADO.NET focuses on the implementation of a Data Access Layer using ADO.NET within the context of the solution. Chapter 6, Programmer Tests: Using TDD with ASP.NET Web Services, describes the Web service portions of the feature. Finally, Chapter 7, Customer Tests: Completing the First Feature, focuses on tests written by the customer using an
We really did not implement the feature in the order that is documented in the chapters. We started out on the client, and we eventually accessed the database and returned values one test at a time. However, the number of steps and the amount of detail that needs to be shown is overwhelming (and frankly pretty boring). We know because we tried it that way first, and we fell asleep writing it. Therefore, we choose to make the chapters more topical instead of using the narrative approach. Describing the solution in this manner also allows us to show aspects of testing that might not be needed for the solution but are important things to keep in mind when writing tests.
Additional Features
Chapter 8, Driving Development with Customer Tests, introduces the ability to associate a review with an existing recording. For this feature, we need to provide some additional Web services, and we need to be able to modify the existing database. We also see how easy it is to extend the existing functionality to be able to support the new feature.
Chapter 9, Driving Development with Customer Tests: Exposing a Failure Condition, describes an unsolved issue that was not fully addressed in Chapter 8. The issue arises when a
Chapter 10, Programmer Tests: Using Transactions, continues the theme of the previous chapters by solving a problem that was caused by improper updates to the database, including issues with the programmer tests as well as the customer tests. The main issue is
Chapter 11, Service Layer Refactoring, addresses the need to move common functions that were developed in Chapters 8 through10 into a new layer, called a Service Layer. We build this new layer as part of the last feature, which is to implement a Web client (which we focus on in Chapter 12, Implementing a Web Client ). This chapter demonstrates the evolving nature of the architecture based on new functionality. We also address dependency management, which is important when building layered software architectures.
Chapter 12 describes how to write programmer tests when implementing an ASP.NET Web client. The chapter addresses the issues associated with writing tests for user interfaces.
