Boolean

Describes the possible expectations for bool and bool? values.

Expectation	Negated	Summary
IsEqualTo	IsNotEqualTo	equal to the expected value
IsTrue	IsNotTrue (only bool?)	true
IsFalse	IsNotFalse (only bool?)	false
IsNull	IsNotNull (only bool?)	null
Implies	DoesNotImply	false, or the other value is true

Equality

You can verify that the bool is equal to another one or not:

bool isPlayed = false;

await That(isPlayed).IsEqualTo(false);
await That(isPlayed).IsNotEqualTo(true);

True / false

You can verify that the bool is true or false:

await That(false).IsFalse();
await That(true).IsTrue();

Awaiting a bool without any expectation is a shorthand for IsTrue():

bool isInLibrary = true;

await That(isInLibrary);

The negations and the null checks are only available for a bool?:

bool? isPlayed = null;

await That(isPlayed).IsNotFalse()
  .Because("it could be true or null");
await That(isPlayed).IsNotTrue()
  .Because("it could be false or null");
await That(isPlayed).IsNull();

note

On a bool?, IsNotTrue() and IsNotFalse() succeed for null.

Implication

You can verify that a implies b or not:

bool isPlayed = false;
bool isInLibrary = true;

await That(isPlayed).Implies(isInLibrary);
await That(isInLibrary).DoesNotImply(isPlayed);