test_c7_3.groovy

//2016-07-06

class Summer {
  def sumWithDefaults(a, b, c = 0) {
    return a + b + c
  }
  def sumWithList(List args) {
    return args.inject(0) { sum, i -> sum += i }
  }
  def sumWithOptionals(a, b, Object[] optionals) {
    return a + b + sumWithList(optionals.toList())
  }
  def sumNamed(Map args) {
    ['a', 'b', 'c'].each{args.get(it, 0)}
    return args.a + args.b + args.c
  }
  def sumMixed(Map args, a, b) {
    return a + b + sumNamed(args)
  }
}

def summer = new Summer()

assert 2 == summer.sumWithDefaults(1, 1)
assert 3 == summer.sumWithDefaults(1, 1, 1)

assert 2 == summer.sumWithList([1, 1])
assert 3 == summer.sumWithList([1, 1, 1])
assert 4 == summer.sumWithList([1, 1, 1, 1])

assert 2 == summer.sumWithOptionals(1, 1)
assert 3 == summer.sumWithOptionals(1, 1, 1)

assert 2 == summer.sumNamed(a: 1, b: 1)
assert 3 == summer.sumNamed(a: 1, b: 1, c: 1)
assert 1 == summer.sumNamed(c: 1)

assert 3 == summer.sumMixed(1, 1, a: 1)
assert 4 == summer.sumMixed(1, 1, b: 1, c: 1)
assert 4 == summer.sumMixed(b: 1, 1, 1, c: 1)