Null

ShouldBeNull and ShouldNotBeNull allow you to check whether a value is null.
ShouldNotBeNull returns the non-null value if it succeeds so that further assertions can be chained. When used with a reference type, the returned value is the same reference annotated as non-null. Equivalently, when used on a System.Nullable<T> expression, the returned value is the unwrapped T value.
ShouldBeNull
var myRef = "Hello World";
myRef.ShouldBeNull();
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Exception
myRef
    should be null but was
"Hello World"
ShouldBeNull (nullable value type)
int? nullableValue = 42;
nullableValue.ShouldBeNull();
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Exception
nullableValue
    should be null but was
42
ShouldNotBeNull
string? myRef = null;
myRef.ShouldNotBeNull();
​snippet source | anchor 
Exception
myRef
    should not be null but was
ShouldNotBeNull (nullable value type)
int? myRef = null;
myRef.ShouldNotBeNull();
​snippet source | anchor 
Exception
myRef
    should not be null but was
ShouldNotBeNull with chaining
var myRef = (string?)"1234";
myRef.ShouldNotBeNull().Length.ShouldBe(5);
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Exception
myRef.ShouldNotBeNull().Length
    should be
5
    but was
4
ShouldNotBeNull with chaining  (nullable value type)
SomeStruct? nullableValue = new SomeStruct { IntProperty = 41 };
nullableValue.ShouldNotBeNull().IntProperty.ShouldBe(42);
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Exception
nullableValue.ShouldNotBeNull().IntProperty
    should be
42
    but was
41
NotBe
Bool
Last updated 4 months ago