csharp-xunit

Comprehensive XUnit testing guide covering standard facts, data-driven theories, and best practices. Your goal is to help me write effective unit tests with XUnit, covering both standard and data-driven testing approaches. - Covers test structure using Arrange-Act-Assert pattern, naming conventions, and fixture-based setup/teardown with IClassFixture and ICollectionFixture - Explains data-driven testing with [Theory] combined with [InlineData] , [MemberData] , and [ClassData] attributes, plus custom data attribute creation - Details assertion methods for equality, collections, regex patterns, and exception handling, with optional fluent assertions library integration - Includes mocking strategies using Moq or NSubstitute, test organization with traits and collections, and diagnostic output via ITestOutputHelper - Use a separate test project with naming convention [ProjectName].Tests - Reference Microsoft.NET.Test.Sdk, xunit, and xunit.runner.visualstudio packages - Create test classes that match the classes being tested (e.g., CalculatorTests for Calculator ) - Use .NET SDK test commands: dotnet test for running tests - No test class attributes required (unlike MSTest/NUnit) - Use fact-based tests with [Fact] attribute for simple tests - Follow the Arrange-Act-Assert (AAA) pattern - Name tests using the pattern MethodName_Scenario_ExpectedBehavior - Use constructor for setup...