public void Constructor_ShouldHydrateCalculatedTerms()
{
// Arrange.
var seedTerms = new Int32[] { 0, 1, 2 };
// Act.
var target = new SimulatedInfiniteSequence(seedTerms);
// Assert.
target.CalculatedTermCount.Should().Be(3);
target.ToArray(0, 3).Should().OnlyContain(term => seedTerms.Contains(term));
}
public void ToArray_ShouldReturnValidResult_ForValidRangeArguments()
{
// Arrange.
var seedTerm = 5;
var startIndex = 3;
var count = 5;
var target = new SimulatedInfiniteSequence(seedTerm);
// Act.
var result = target.ToArray(startIndex, count);
// Assert.
result.Should().BeEquivalentTo(8, 9, 10, 11, 12);
target.CalculatedTermCount.Should().Be(8);
}
public void ToArray_ShouldRaiseArgumentOutOfRangeException_ForNegativeStartIndexArgument()
{
// Arrange.
var seedTerm = 5;
var startIndex = -1;
var count = 3;
var target = new SimulatedInfiniteSequence(seedTerm);
// Act.
var action = new Action(() =>
{
var result = target.ToArray(startIndex, count);
});
// Assert.
action.Should().Throw <ArgumentOutOfRangeException>();
}