The current implementation of the test project will not scale well with hundreds of tests. Having to manually enter each test in the Test Runner is labor intensive and prone to errors. Most unit testing frameworks rely on .NET reflection to automatically discover tests in a test project. This tutorial shows how to create a custom .NET attribute that enable the auto discovery of test methods.
- [Voiceover] I'll review the code that's…in my TestRunner project in this MainWindow.xaml.cs file.…In the Button Click handler I'm instantiating…an instance of my test class,…and then I'm calling each of the test methods…that are inside that class.…This works for simple projects,…but it's simply not gonna scale…when I start adding multiple unit tests.…Here's what I mean:…I have this Brokerage library,…and I have this Commission Calculator class,…and I've decided I need to write…some unit tests for that too,…so I go to my Testing library,…I'd add another testing class,…and then I'd add several testing methods.…
For this example, let's say we've added 18 test methods.…Then I'd have to go back to my Button Click handler…and instantiate my new test class,…and then have a line of code inside this click handler…for each of the methods I need to invoke.…That's simply not gonna scale if I have hundreds…or thousands of unit tests.…What I need to do is find a way in .net to tell…the TestRunner which methods inside the testing library…
Author
Updated
8/29/2017Released
6/16/2016- Examining types of frameworks
- Choosing a naming convention
- Creating unit tests
- Running unit tests with Visual Studio
- Modifying and correcting code
- Handling exceptions
- Installing and using nUnit
- Viewing test results with CodeLens
Skill Level Beginner
Duration
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Q: This course was updated on 08/22/2017. What changed?
A: New videos were added that cover live unit testing and creating a project with the unit test framework.
Related Courses
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Introduction
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Welcome59s
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1. Create a Simple Unit Test Framework
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What are unit tests?6m 23s
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Add the test projects1m 14s
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Analyze which tests to run2m 10s
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Create a simple test4m 45s
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Create a simple test runner3m 46s
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Add additional tests2m 59s
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Refactor the test runner3m 59s
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Create an Assert class5m 20s
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Use the Assert class3m 49s
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2. Unit Testing Conventions
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Choose a naming convention5m 59s
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3. Work with Visual Studio Unit Testing Framework
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Create the unit test4m 16s
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Run the unit test3m 21s
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Modify code to pass test4m 53s
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Expected exceptions4m 27s
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Test parameters4m 9s
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4. Work with xUnit
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Install xUnit2m 21s
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Expected exceptions4m 55s
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Test multiple parameters2m 13s
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5. Work with nUnit
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Install nUnit2m 9s
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Create and run a unit test2m 25s
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Use the nUnit constraints3m 44s
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More nUnit constraints6m 16s
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Test parameters2m 21s
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6. Additional Topics
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Get more from your tests4m 40s
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Debug unit tests2m 8s
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Use the test menus3m 27s
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Live unit testing4m 56s
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Conclusion
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Goodbye1m 1s
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Video: Add an attribute to the Assert class