assertCount method
Asserts that any elements in this iterable meet a given condition. If not, an AssertionError is thrown.
The iterable is consumed and the elements are counted. If the length of the iterable
is equal to the given count
, the iterable is returned. If not,
an AssertionError is thrown.
If message
is provided and an AssertionError is thrown, the message will
be provided with the error.
Implementation
Iterable<T> assertCount(int count, [String? message]) {
assert(count == this.count(), message);
return this;
}