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Build Robust Web Apps in the Real World @shahedC WakeUpAndCode.com

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Why Unit Testing? > Getting Started > Writing and Running Tests > Mocking Whats Next?

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> Nothing new to learn > Error-prone > Expensive > Slower

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> Less human error > Faster! > Decreasing costs > Learning curve

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Legacy New/ Improved Design Patterns S.O.L.I.D.TDDRefactorRestructure SRP OCP LSP ISP DIP

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Source: https://msdn.microsoft.com/en-us/library/jj159342.aspx

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Why Unit Testing? > Getting Started > Writing and Running Tests > Mocking Whats Next?

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Unit TestsIntegration TestsUI Tests

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xUnit.net references Web App being tested

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public test class [Fact] for public methods without parameters [Theory] and [InlineData] for methods with parameters

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Build Solution Run Tests in Test Explorer

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Verify actual result against expected result Note var keyword

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Verify that expected view equal to returned view

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Temporarily ignore tests with an optional message.

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Correct Views? Redirect to URL? Correct Models? HTTP Code? Mock Depen- dencies! Model Populated?

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Mocks Pre-programmed with expected results, doesnt actually connect to DB, behavior verification. Fakes Working examples, but not production-ready (e..g in-memory database) Stubs Provides canned answers

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Smoke Tests New Features Edge Cases

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Cost of Adding Unit Tests Cost of Not Having Unit Tests Bugs Features Expenses

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Dependency Injection Inversion of Control

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Views & ViewModels Controllers Service Layer Repository Layer Entity Framework (ORM) SQL Server (database)

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60 to 80% coverage ok?

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Why Unit Testing? > Getting Started > Writing and Running Tests > Mocking Whats Next?

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Email: shchowd@microsoft.com Twitter: @shahedCshchowd@microsoft.com@shahedC