nextDouble method

@override @useResult double nextDouble()

Returns the next double in the iterable.

Contract

Throws:

• a StateError if there are no more doubles in the iterable.
• a RangeError if a double in the iterable is outside the range, 0 <= double < 1.0.

Example

final random = FakeRandom(doubles: [0.1, 0.2]);
random.nextDouble(); // 0.1
random.nextDouble(); // 0.2
random.nextDouble(); // throws StateError

Implementation

@override
@useResult double nextDouble() {
  if (!_doubles.moveNext()) {
    throw StateError('FakeRandom presently does not contain a double. Try supply more doubles to `FakeRandom(doubles: [...])`.');
  }

  if (_doubles.current < 0.0 || 1.0 <= _doubles.current) {
    throw RangeError('The current double, ${_doubles.current} is outside the range, `0.0 <= ${_doubles.current} < 1.0`. Try change the doubles supplied to `FakeRandom(doubles: [...])`.');
  }

  return _doubles.current;
}