public async Task ProcessAsync_WithIdSpecifiedGeneratesExpectedOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("An error!");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var htmlHelper = new Mock <IHtmlHelper>();
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), "Foo");
var tagHelper = new ErrorMessageTagHelper(new DefaultGovUkHtmlGenerator())
{
Id = "some-id"
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Equal("some-id", output.Attributes["id"].Value);
}
public async Task ProcessAsync_NoAspForOrContent_ThrowsInvalidOperationException()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.TagMode = TagMode.SelfClosing;
var htmlHelper = new Mock <IHtmlHelper>();
var tagHelper = new ErrorMessageTagHelper();
// Act
var ex = await Record.ExceptionAsync(() => tagHelper.ProcessAsync(context, output));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("Cannot determine content. Element must contain content if the 'asp-for' attribute is not specified.", ex.Message);
}
public async Task ProcessAsync_GeneratesExpectedOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("An error!");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new ErrorMessageTagHelper();
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var expectedHtml = @"
<p class=""govuk-error-message"">
<span class=""govuk-visually-hidden"">Error:</span>
An error!
</p>";
AssertEx.HtmlEqual(expectedHtml, output.RenderToString());
}
public async Task ProcessAsync_AspForSpecifiedGeneratesExpectedContent()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.TagMode = TagMode.SelfClosing;
var htmlGenerator = new Mock <DefaultGovUkHtmlGenerator>()
{
CallBase = true
};
htmlGenerator
.Setup(mock => mock.GetValidationMessage(
/*viewContext: */ It.IsAny <ViewContext>(),
/*modelExplorer: */ It.IsAny <ModelExplorer>(),
/*expression: */ It.IsAny <string>()))
.Returns("An error!");
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), "Foo");
var tagHelper = new ErrorMessageTagHelper(htmlGenerator.Object)
{
AspFor = new ModelExpression("Foo", modelExplorer),
ViewContext = new ViewContext()
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var html = output.AsString();
Assert.Equal(
"<span class=\"govuk-error-message\">" +
"<span class=\"govuk-visually-hidden\">Error</span>" +
"An error!" +
"</span>",
html);
}
public async Task ProcessAsync_AspForSpecified_GeneratesExpectedContent()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.TagMode = TagMode.SelfClosing;
var modelHelperMock = new Mock <IModelHelper>();
modelHelperMock
.Setup(mock => mock.GetValidationMessage(
/*viewContext: */ It.IsAny <ViewContext>(),
/*modelExplorer: */ It.IsAny <ModelExplorer>(),
/*expression: */ It.IsAny <string>()))
.Returns("An error!");
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), new Model())
.GetExplorerForProperty(nameof(Model.SimpleProperty));
var tagHelper = new ErrorMessageTagHelper(htmlGenerator: null, modelHelperMock.Object)
{
AspFor = new ModelExpression(nameof(Model.SimpleProperty), modelExplorer),
ViewContext = new ViewContext()
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var expectedHtml = @"
<p class=""govuk-error-message"">
<span class=""govuk-visually-hidden"">Error:</span>
An error!
</p>";
AssertEx.HtmlEqual(expectedHtml, output.RenderToString());
}
public async Task ProcessAsync_AspForSpecifiedButNoError_GeneratesNoOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
output.TagMode = TagMode.SelfClosing;
var modelHelperMock = new Mock <IModelHelper>();
modelHelperMock
.Setup(mock => mock.GetValidationMessage(
/*viewContext: */ It.IsAny <ViewContext>(),
/*modelExplorer: */ It.IsAny <ModelExplorer>(),
/*expression: */ It.IsAny <string>()))
.Returns((string)null);
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), new Model())
.GetExplorerForProperty(nameof(Model.SimpleProperty));
var tagHelper = new ErrorMessageTagHelper(new ComponentGenerator(), modelHelperMock.Object)
{
AspFor = new ModelExpression(nameof(Model.SimpleProperty), modelExplorer),
ViewContext = new ViewContext()
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
Assert.Null(output.TagName);
}
public async Task ProcessAsync_WithVisuallyHiddenTextSpecifiedGeneratesExpectedOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-error-message",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-error-message",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent("An error!");
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var htmlHelper = new Mock <IHtmlHelper>();
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), "Foo");
var tagHelper = new ErrorMessageTagHelper(new DefaultGovUkHtmlGenerator())
{
VisuallyHiddenText = "Overriden"
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var html = output.AsString();
Assert.Equal(
"<span class=\"govuk-error-message\">" +
"<span class=\"govuk-visually-hidden\">Overriden</span>" +
"An error!" +
"</span>",
html);
}