public void ReturnsFirstPageWhenPageIsNegative()
{
var testData = new Pageable <int>(_data);
var firstPage = testData.GetCurrentPage().ToList();
Assert.AreEqual(1, firstPage.First());
Assert.AreEqual(10, firstPage.Last());
var secondPage = testData.PreviousPage().ToList();
Assert.AreEqual(1, secondPage.First());
Assert.AreEqual(10, secondPage.Last());
var thirdPage = testData.PreviousPage().ToList();
Assert.AreEqual(1, thirdPage.First());
Assert.AreEqual(10, thirdPage.Last());
}
public void CanPreviousPage()
{
var testData = new Pageable <int>(_data);
var firstPage = testData.GetCurrentPage().ToList();
Assert.AreEqual(1, firstPage.First());
Assert.AreEqual(10, firstPage.Last());
var secondPage = testData.NextPage().ToList();
Assert.AreEqual(11, secondPage.First());
Assert.AreEqual(20, secondPage.Last());
testData.NextPage();
var thirdPage = testData.PreviousPage().ToList();
Assert.AreEqual(secondPage.First(), thirdPage.First());
Assert.AreEqual(secondPage.Last(), thirdPage.Last());
var fourthPage = testData.PreviousPage().ToList();
Assert.AreEqual(firstPage.First(), fourthPage.First());
Assert.AreEqual(firstPage.Last(), fourthPage.Last());
}
public void CannotExcceedMaxPages()
{
var testData = new Pageable <int>(_data);
for (var i = 0; i < 20; i++)
{
testData.NextPage();
}
var lastPage = testData.GetCurrentPage().ToList();
Assert.AreEqual(131, lastPage.First());
Assert.AreEqual(135, lastPage.Last());
var nextToLastPage = testData.PreviousPage();
Assert.AreEqual(121, nextToLastPage.First());
}