public static MvcHtmlString PageLinks(this HtmlHelper html, PagingInfo pagingInfo, Func<int,string> pageUrl)
{
StringBuilder result = new StringBuilder();
for(int i = 1;i<= pagingInfo.TotalPages; i++)
{
TagBuilder tag = new TagBuilder("a"); // construct <a> tag
tag.MergeAttribute("href", pageUrl(i));
tag.InnerHtml = i.ToString();
if (i == pagingInfo.CurrentPage)
tag.AddCssClass("selected");
result.Append(tag.ToString());
}
return MvcHtmlString.Create(result.ToString());
}
public void PageLinksTest_CanGeneratePageLinks()
{
HtmlHelper htmlHelper = null;
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
Func<int, string> pageUrlDelegate = i => "Page" + i;
MvcHtmlString expected = MvcHtmlString.Create(@"<a href=""Page1"">1</a><a class=""selected"" href=""Page2"">2</a><a href=""Page3"">3</a>");
MvcHtmlString actual = PagingHelpers.PageLinks(htmlHelper, pagingInfo, pageUrlDelegate);
Assert.AreNotEqual(expected, actual);//two different objects
Assert.AreEqual(expected.ToString(), actual.ToString());
}
public void PageLinks_WhenGivenAPagingInformation_ShouldReturnASeriesOfHtmlLinksForEveryPage()
{
// Arrange
HtmlHelper helper = null;
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
Func<int, string> pageUrlDelegate = x => "Page" + x;
// Act
MvcHtmlString links = helper.PageLinks(pagingInfo, pageUrlDelegate);
// Assert
Assert.AreEqual(expected: links.ToString(),
actual: @"<a href=""Page1"">1</a><a class=""selected"" href=""Page2"">2</a><a href=""Page3"">3</a>");
}
public static MvcHtmlString PagingLinks(this HtmlHelper helper, PagingInfo pageInfo, Func<int, string> calculatePageUrl)
{
StringBuilder pagingString = new StringBuilder();
for (int page = 1; page <= pageInfo.TotalPages; page++) {
TagBuilder anchorTag = new TagBuilder("a");
anchorTag.MergeAttribute("href", calculatePageUrl(page));
anchorTag.InnerHtml = page.ToString();
if (page == pageInfo.CurrentPage) {
anchorTag.AddCssClass("selected");
}
pagingString.AppendLine(anchorTag.ToString());
}
return MvcHtmlString.Create(pagingString.ToString());
}
public void Can_Generate_Page_Links()
{
//potrzebujemy zdefiniowanej metody pomocniczej html
HtmlHelper myHelper = null;
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
Func<int, string> pageUrlDelegate = i => "strona" + i;
MvcHtmlString result = myHelper.PageLinks(pagingInfo, pageUrlDelegate);
Assert.AreEqual(@"<a class=""btn btn-default"" href=""strona1"">1</a>" + @"<a class=""btn btn-default btn-primary selected"" href=""strona2"">2</a>" + @"<a class=""btn btn-default"" href=""strona3"">3</a>", result.ToString());
}
public void Can_Generate_Page_Links()
{
HtmlHelper myHelper = null;
//arrange
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
// setup lambda
Func<int, string> pageUrlDelegate = i => "Page" + i;
// act
MvcHtmlString result = myHelper.PageLinks(pagingInfo, pageUrlDelegate);
// assert
Assert.AreEqual(@"<a class=""btn btn-default"" href=""Page1"">1</a>"
+ @"<a class=""btn btn-default btn-primary selected"" href=""Page2"">2</a>"
+ @"<a class=""btn btn-default"" href=""Page3"">3</a>",
result.ToString());
}
public void Can_Generate_Page_Links()
{
// Arrange - define an HTML helper - we need to do this
// in order to apply the extension method
HtmlHelper myHelper = null;
// Arrange - create PagingInfo data
PagingInfo pagingInfo = new PagingInfo
{
CurrentPage = 2,
TotalItems = 28,
ItemsPerPage = 10
};
// Arrange - set up the delegate using a lambda expression
Func<int, string> pageUrlDelegate = i => "Page" + i;
// Act
MvcHtmlString result = myHelper.PageLinks(pagingInfo, pageUrlDelegate);
// Assert
Assert.AreEqual(@"<a class=""btn btn-default"" href=""Page1"">1</a>"
+ @"<a class=""btn btn-default btn-primary selected"" href=""Page2"">2</a>"
+ @"<a class=""btn btn-default"" href=""Page3"">3</a>",
result.ToString());
}
public void can_generate_links_to_other_pages()
{
// arrange
HtmlHelper helper = null;
PagingInfo info = new PagingInfo {
CurrentPage = 2,
TotalItems = 14,
ItemsPerPage = 5
};
Func<int, string> pageUrl = page => "Page" + page;
// act
MvcHtmlString result = helper.PagingLinks(info, pageUrl);
// assert
result.ToString().ShouldEqual(@"<a href=""Page1"">1</a>" + Environment.NewLine +
@"<a class=""selected"" href=""Page2"">2</a>" + Environment.NewLine +
@"<a href=""Page3"">3</a>" + Environment.NewLine +
"");
}
public void Can_Send_Paginaton_View_Model()
{
//arrange
Mock<IProductsRepository> mock = new Mock<IProductsRepository>();
mock.Setup(m => m.Products).Returns(new Product[]{
new Product{ProductID = 1, Name="P1"},
new Product{ProductID = 2, Name="P2"},
new Product{ProductID = 3, Name="P3"},
new Product{ProductID = 4, Name="P4"},
new Product{ProductID = 5, Name="P5"}
});
ProductController controller = new ProductController(mock.Object);
controller.pageSize = 3;
//act
ProductsListViewModel result = (ProductsListViewModel)controller.List(null, 2).Model;
//assert
PagingInfo pageInfo = new PagingInfo();
Assert.AreEqual(pageInfo.CurrentPage, 2);
Assert.AreEqual(pageInfo.ItemsPerPage, 3);
Assert.AreEqual(pageInfo.TotalItems, 5);
Assert.AreEqual(pageInfo.TotalItems, 2);
}
