public void Test_2()
{
var iterator = new CombinationIterator("abc", 2);
iterator.Next().Should().Be("ab");
iterator.HasNext().Should().BeTrue();
iterator.Next().Should().Be("ac");
iterator.HasNext().Should().BeTrue();
iterator.Next().Should().Be("bc");
iterator.HasNext().Should().BeFalse();
}
public void TestMethod1()
{
var iterator = new CombinationIterator("chp", 1);
var k1 = iterator.HasNext();
var k2 = iterator.Next(); // returns "ab"
var k3 = iterator.HasNext(); // returns "ab"
var k4 = iterator.HasNext(); // returns true
var k5 = iterator.Next(); // returns true
var k6 = iterator.Next(); // returns "ac"
var k7 = iterator.HasNext(); // returns "bc"
var k8 = iterator.HasNext(); // returns false
var k9 = iterator.HasNext(); // returns false
}