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CHAPTER 6 CREATING TESTWARE COMPONENTS
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VB .NET 'Create string variables and get the data from the user 'strTester = txtTester.Text 'strApplicationName = txtAppName.Text 'strBuildNumber = txtBuildNumber.Text 'strDateReported = txtDateReported.Text 'strDescription = txtDescription.Text 'strFileName = txtFileName.Text objReport.Tester = txtTester.Text objReport.ApplicationName = txtAppName.Text objReport.BuildNumber = txtBuildNumber.Text objReport.DateReported = txtDateReported.Text objReport.Description = txtDescription.Text objReport.FileName = txtFileName.Text C# //Create string variables and get the data from the user //strTester = txtTester.Text; //strApplicationName = txtAppName.Text; //strBuildNumber = txtBuildNumber.Text; //strDateReported = txtDateReported.Text; //strDescription = txtDescription.Text; //strFileName = txtFileName.Text; objReport.Tester = txtTester.Text; objReport.ApplicationName = txtAppName.Text; objReport.BuildNumber = txtBuildNumber.Text; objReport.DateReported = txtDateReported.Text; objReport.Description = txtDescription.Text; objReport.FileName = txtFileName.Text; 12. Now you need to change the way you call the Save() method in the BugReporterForm. Since the Save() method has been moved to objReport, you need to add code that will call the method in that object. Once again, comment out the code you used previously and add this new version to the BugReporterForm class: VB .NET 'Call the Save() method 'If objReport.Save() = True Then ' MessageBox.Show("Bug reported!") 'Else ' MessageBox.Show("There was an error!") 'End If If objReport.Save() = True Then MessageBox.Show("Bug recorded") txtDescription.Text = ""
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CHAPTER 6 CREATING TESTWARE COMPONENTS
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Else MessageBox.Show("There was an error") End If C# // // // // // // if { Call the Save() method If objReport.Save() = True Then MessageBox.Show("Bug reported!") Else MessageBox.Show("There was an error!") End If (objReport.Save() == true) MessageBox.Show("Bug recorded"); txtDescription.Text = ""; } else { MessageBox.Show("There was an error"); } 13. Add code that calls the FormatData() method just before you call the Save() method: VB .NET 'Call the FormatData() method objReport.FormatData() C# //Call the FormatData() method objReport.FormatData(); 14. Run the program and verify that it still saves the bug report data when the BugReport.csv file is not in Read Only mode and gives an error when it is. 15. Once you have verified that that program is working as it was before you moved the code, go back and remove all of the code you commented out. In this exercise, you saw how to create a new class that included fields, properties, a constructor, and a method. You also saw how to create an object from your class, set the properties, and call the methods. While you have not fundamentally changed the way the program behaves, you have made it easier to reuse the code in the ReportToFile class in another project. For example, you could create a web application and use the ReportToFile class in that project without modifications. You will learn more about web applications in 9, but if you would like to see an example, you will find the completed version of the files in the 6 DemoCode\Exercise6-4WebSite folder (see Appendix A for download instructions).
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CHAPTER 6 CREATING TESTWARE COMPONENTS
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Separating Different Classes into Different Files
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No doubt, you are starting to see a pattern to this chapter. You have been taking your code, deciding which parts are alike and which are dissimilar, and then placing that code into different, reusable containers. First came the procedure, then the class files, and now you will divide the classes into different files. One file will hold the UI code in an .exe file and one will hold the data processing code in a .dll (dynamic link library) file. Each of these files is considered a component of the bug-reporter application. The reason for doing this is much the same as it was in the last two sections: self-contained code can be reused without exhaustive retesting as long as it is not modified. Using different files can save you time and money when making your testware applications, just like using procedures and different classes. As a bonus, creating testware in this way lets you see how the applications you test are made. That s right, most modern programs are made up of multiple files, so learning how to do this yourself will give you a better understanding of what potential problems to test for. Testing a file while other people are still working on another part of the project becomes a reality when using separate files. As a tester, you can test these components by creating a small testware program referred to as a test harness. Creating a test harness is an important part of unit testing. Unit testing helps you prove that one component of the application works as expected, or not. In other words, when you add data and call the methods, its code works as you predicted. Unit tests are run as a White Box test or a Black Box test.
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