better-unit-test-in-c#-article-FillBoxTest-layout.cs

better-unit-test-in-c#-article-FillBoxTest-layout.cs

public static class FillBoxTest
{
  public sealed record Args
  {
      public IBox Box { get; init; } = null!;
      public Dictionary<string, Thing> LabelsAndThings { get; init; } = new();
      public WriteLog WriteLog { get; init; } = null!;
  }

  sealed class TestCases : IEnumerable<object[]>
  {
    ...
  }

  [Theory]
  [ClassData(typeof(TestCases))]
  public static void Test(
    Args args,
    Dictionary<string, Thing> expected)
  {
    var actual = Operations.FillBox(args.Box, args.LabelsAndThings, args.WriteLog);
    Assert.Equal(expected, actual);
  }
}