public async Task ProcessAsync_ThrowsIfRouteAndActionOrControllerProvided(string propertyName)
{
// Arrange
var metadataProvider = new EmptyModelMetadataProvider();
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var anchorTagHelper = new AnchorTagHelper(htmlGenerator)
{
Route = "Default",
};
typeof(AnchorTagHelper).GetProperty(propertyName).SetValue(anchorTagHelper, "Home");
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) => Task.FromResult <TagHelperContent>(null));
var expectedErrorMessage = "Cannot determine an 'href' attribute for <a>. An <a> with a specified " +
"'asp-route' must not have an 'asp-action' or 'asp-controller' attribute.";
var context = new TagHelperContext(
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(
() => anchorTagHelper.ProcessAsync(context, output));
Assert.Equal(expectedErrorMessage, ex.Message);
}
public async Task ProcessAsync_EmptyStringOnAspAreaIsPassedThroughToRouteValues()
{
// Arrange
var context = new TagHelperContext(
tagName: "a",
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Something");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.Content.SetContent(string.Empty);
var generator = new Mock <IHtmlGenerator>();
var expectedRouteValues = new Dictionary <string, object> {
{ "area", string.Empty }
};
generator
.Setup(mock => mock.GenerateActionLink(
It.IsAny <ViewContext>(),
string.Empty,
"Index",
"Home",
"http",
"contoso.com",
"hello=world",
expectedRouteValues,
null))
.Returns(new TagBuilder("a"))
.Verifiable();
var anchorTagHelper = new AnchorTagHelper(generator.Object)
{
Action = "Index",
Controller = "Home",
Area = string.Empty,
Fragment = "hello=world",
Host = "contoso.com",
Protocol = "http"
};
// Act
await anchorTagHelper.ProcessAsync(context, output);
// Assert
generator.Verify();
Assert.Equal("a", output.TagName);
Assert.Empty(output.Attributes);
Assert.Empty(output.Content.GetContent());
}
public async Task ProcessAsync_CallsIntoRouteLinkWithExpectedParameters()
{
// Arrange
var context = new TagHelperContext(
tagName: "a",
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Something");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.Content.SetContent(string.Empty);
var generator = new Mock <IHtmlGenerator>(MockBehavior.Strict);
generator
.Setup(mock => mock.GenerateRouteLink(
It.IsAny <ViewContext>(),
string.Empty,
"Default",
"http",
"contoso.com",
"hello=world",
It.IsAny <IDictionary <string, object> >(),
null))
.Returns(new TagBuilder("a"))
.Verifiable();
var anchorTagHelper = new AnchorTagHelper(generator.Object)
{
Fragment = "hello=world",
Host = "contoso.com",
Protocol = "http",
Route = "Default",
};
// Act & Assert
await anchorTagHelper.ProcessAsync(context, output);
generator.Verify();
Assert.Equal("a", output.TagName);
Assert.Empty(output.Attributes);
Assert.Empty(output.Content.GetContent());
}
public async Task ProcessAsync_AddsPageToRouteValuesAndCallsPageLinkWithExpectedParameters()
{
// Arrange
var context = new TagHelperContext(
tagName: "a",
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Something");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.Content.SetContent(string.Empty);
var generator = new Mock <IHtmlGenerator>();
generator
.Setup(mock => mock.GeneratePageLink(
It.IsAny <ViewContext>(),
string.Empty,
"/User/Home/Index",
"page-handler",
"http",
"contoso.com",
"hello=world",
It.IsAny <object>(),
null))
.Returns(new TagBuilder("a"))
.Verifiable();
var anchorTagHelper = new AnchorTagHelper(generator.Object)
{
Page = "/User/Home/Index",
PageHandler = "page-handler",
Fragment = "hello=world",
Host = "contoso.com",
Protocol = "http",
};
// Act
await anchorTagHelper.ProcessAsync(context, output);
// Assert
generator.Verify();
}
public async Task ProcessAsync_ThrowsIfHrefConflictsWithBoundAttributes(string propertyName)
{
// Arrange
var metadataProvider = new EmptyModelMetadataProvider();
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var anchorTagHelper = new AnchorTagHelper(htmlGenerator);
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList
{
{ "href", "http://www.contoso.com" }
},
getChildContentAsync: (useCachedResult, encoder) => Task.FromResult <TagHelperContent>(null));
if (propertyName == "asp-route-")
{
anchorTagHelper.RouteValues.Add("name", "value");
}
else
{
typeof(AnchorTagHelper).GetProperty(propertyName).SetValue(anchorTagHelper, "Home");
}
var expectedErrorMessage = "Cannot override the 'href' attribute for <a>. An <a> with a specified " +
"'href' must not have attributes starting with 'asp-route-' or an " +
"'asp-action', 'asp-controller', 'asp-area', 'asp-route', 'asp-protocol', 'asp-host', " +
"'asp-fragment', 'asp-page' or 'asp-page-handler' attribute.";
var context = new TagHelperContext(
tagName: "test",
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(
() => anchorTagHelper.ProcessAsync(context, output));
Assert.Equal(expectedErrorMessage, ex.Message);
}
public async Task ProcessAsync_ThrowsIfActionAndPageProvided()
{
// Arrange
var metadataProvider = new EmptyModelMetadataProvider();
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var anchorTagHelper = new AnchorTagHelper(htmlGenerator)
{
Action = "Action",
Page = "Page",
};
var output = new TagHelperOutput(
"a",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) => Task.FromResult <TagHelperContent>(null));
var expectedErrorMessage = string.Join(
Environment.NewLine,
"Cannot determine the 'href' attribute for <a>. The following attributes are mutually exclusive:",
"asp-route",
"asp-controller, asp-action",
"asp-page, asp-page-handler");
var context = new TagHelperContext(
tagName: "test",
allAttributes: new TagHelperAttributeList(
Enumerable.Empty <TagHelperAttribute>()),
items: new Dictionary <object, object>(),
uniqueId: "test");
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(
() => anchorTagHelper.ProcessAsync(context, output));
Assert.Equal(expectedErrorMessage, ex.Message);
}
public async Task ProcessAsync_GeneratesExpectedOutput()
{
// Arrange
var expectedTagName = "not-a";
var metadataProvider = new TestModelMetadataProvider();
var tagHelperContext = new TagHelperContext(
tagName: "not-a",
allAttributes: new TagHelperAttributeList
{
{ "id", "myanchor" },
{ "asp-route-name", "value" },
{ "asp-action", "index" },
{ "asp-controller", "home" },
{ "asp-fragment", "hello=world" },
{ "asp-host", "contoso.com" },
{ "asp-protocol", "http" }
},
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
expectedTagName,
attributes: new TagHelperAttributeList
{
{ "id", "myanchor" },
},
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("Something Else");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.Content.SetContent("Something");
var urlHelper = new Mock <IUrlHelper>();
urlHelper
.Setup(mock => mock.Action(It.IsAny <UrlActionContext>())).Returns("home/index");
var htmlGenerator = new TestableHtmlGenerator(metadataProvider, urlHelper.Object);
var viewContext = TestableHtmlGenerator.GetViewContext(
model: null,
htmlGenerator: htmlGenerator,
metadataProvider: metadataProvider);
var anchorTagHelper = new AnchorTagHelper(htmlGenerator)
{
Action = "index",
Controller = "home",
Fragment = "hello=world",
Host = "contoso.com",
Protocol = "http",
RouteValues =
{
{ "name", "value" },
},
ViewContext = viewContext,
};
// Act
await anchorTagHelper.ProcessAsync(tagHelperContext, output);
// Assert
Assert.Equal(2, output.Attributes.Count);
var attribute = Assert.Single(output.Attributes, attr => attr.Name.Equals("id"));
Assert.Equal("myanchor", attribute.Value);
attribute = Assert.Single(output.Attributes, attr => attr.Name.Equals("href"));
Assert.Equal("home/index", attribute.Value);
Assert.Equal("Something", output.Content.GetContent());
Assert.Equal(expectedTagName, output.TagName);
}
