True Constraint

TrueConstraint tests that a value is true. Use this constraint when asserting boolean conditions or the result of boolean expressions.

Usage

Is.True
Is.Not.True  // equivalent to Is.False

Examples

[Test]
public void TrueConstraint_Examples()
{
    Assert.That(2 + 2 == 4, Is.True);
    var isValid = true;
    Assert.That(isValid, Is.True);
    var list = new List<int> { 1, 2, 3 };
    Assert.That(list.Contains(2), Is.True);

    // With nullable booleans
    bool? hasValue = true;
    Assert.That(hasValue, Is.True);
}

Notes

  1. Is.Not.True is equivalent to Is.False for non-nullable booleans.
  2. For nullable booleans (bool?), Is.True only passes when the value is exactly true, not when it's null.

See Also