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Multiple expectations

You can combine multiple expectations in different ways:

On the same property​

Simply use .And or .Or to combine multiple expectations, e.g.

string subject = "something different";
await Expect.That(subject).StartsWith("some").And.EndsWith("text");
Expected subject to
start with "some" and end with "text",
but it was "something different"

On different properties of the same subject​

Use the For-syntax to access different properties of a common subject and combine them again with .And or .Or, e.g.

  public record Album(int TrackCount, string Title);
  Album subject = new(1, "Dark Side of the Sun");
  
  await Expect.That(subject)
    .For(x => x.TrackCount, x => x.IsGreaterThan(1)).And
    .For(x => x.Title, x => x.Is("Dark Side of the Moon"));
Expected subject to
for .TrackCount be greater than 1 and for .Title be equal to "Dark Side of the Moon",
but .TrackCount was 1 and .Title was "Dark Side of the Sun" which differs at index 17:
                     ↓ (actual)
  "Dark Side of the Sun"
  "Dark Side of the Moon"
                     ↑ (expected)

On different subjects​

Use the Expect.ThatAll or Expect.ThatAny syntax to combine arbitrary expectations, e.g.

  string subjectA = "ABC";
  string subjectB = "XYZ";
  
  await Expect.ThatAll(
    Expect.That(subjectA).Is("ABC"),
    Expect.That(subjectB).Is("DEF"));
Expected all of the following to succeed:
 [01] Expected subjectA to be equal to "ABC"
 [02] Expected subjectB to be equal to "DEF"
but
 [02] it was "XYZ" which differs at index 0:
         ↓ (actual)
        "XYZ"
        "DEF"
         ↑ (expected)