public void CalculateNext_ShouldProduceDesiredResults_ForValidCountArgument()
{
// Arrange.
var seedTerms = new Int32[] { 0, 1, 2 };
var target = new SimulatedInfiniteSequence(seedTerms);
// Act.
var result = target.CalculateNext(5);
// Assert.
result.Should().BeEquivalentTo(3, 4, 5, 6, 7);
target.CalculatedTermCount.Should().Be(8);
}
public void CalculateNext_ShouldProduceDesiredResults_ForParameterlessInvocation()
{
// Arrange.
var seedTerms = new Int32[] { 0, 1, 2 };
var target = new SimulatedInfiniteSequence(seedTerms);
// Act.
var result = target.CalculateNext();
// Assert.
result.Should().Be(3);
target.CalculatedTermCount.Should().Be(4);
}
public void CalculateNext_ShouldRaiseArgumentOutOfRangeException_ForNegativeCountArgument()
{
// Arrange.
var seedTerms = new Int32[] { 0, 1, 2 };
var target = new SimulatedInfiniteSequence(seedTerms);
// Act.
var action = new Action(() =>
{
var result = target.CalculateNext(-1);
});
// Assert.
action.Should().Throw <ArgumentOutOfRangeException>();
}