shouldBeNull

Used to assert that one value is equal to null.

void

shouldBeNull

(

)

(

T a

string message = null

string file = __FILE__

size_t line = __LINE__

)

Parameters

a: Type: T
The value that should equal null.
file: Type: string
The file name that the assert failed in. Should be left as default.
line: Type: size_t
The file line that the assert failed in. Should be left as default.

If value is NOT null, will throw an AssertError.

// Will throw an exception like "AssertError@example.d(6): expected to be <null>."
string z = "blah";
z.shouldBeNull();