[Theory]
[InlineData("{")]
[InlineData("}")]
[InlineData("{}")]
[InlineData("{0}")]
[InlineData("{{0}}")]
public void Can_handle_braces_in_dictionary_keys(string key)
{
    // Arrange
    var subject = new Dictionary<string, string> { [key] = "" };
    var expectation = new Dictionary<string, string> { [key] = null };

    // Act
    var act = () => expectation.Should().BeEquivalentTo(subject);

    // Assert
    act.Should().Throw<XunitException>()
        .WithMessage($"Expected expectation[{key}] to be \"\", but found <null>.*");
}