ok
Assert: ok(value, message)
Tests if value is truthy. It is equivalent to assert.equal(!!value, true, message).
If value is not truthy, an AssertionError is thrown with a message property set equal to the value of the message parameter. If the message parameter is undefined, a default error message is assigned. If the message parameter is an instance of an Error then it will be thrown as the error.
Parameters
values
The first value is the value to test; the second, if any, is used as a string error message, thrown if the first value does not test as truthy.