public async Task ProcessAsync_DoesNotUseViewContext_IfSelectedNotNull(
string originalContent,
string selected,
string value,
ICollection <string> _,
TagHelperOutput __)
{
// Arrange
var originalAttributes = new TagHelperAttributeList
{
{ "label", "my-label" },
{ "selected", selected },
};
var originalTagName = "not-option";
var contextAttributes = new TagHelperAttributeList
{
{ "label", "my-label" },
{ "selected", selected },
{ "value", value },
};
var originalPreContent = "original pre-content";
var originalPostContent = "original post-content";
var tagHelperContext = new TagHelperContext(
tagName: "option",
allAttributes: contextAttributes,
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
originalTagName,
originalAttributes,
getChildContentAsync: (useCachedResult, encoder) =>
{
var tagHelperContent = new DefaultTagHelperContent();
tagHelperContent.SetContent(originalContent);
return(Task.FromResult <TagHelperContent>(tagHelperContent));
})
{
TagMode = TagMode.StartTagAndEndTag,
};
output.PreContent.SetContent(originalPreContent);
output.Content.SetContent(originalContent);
output.PostContent.SetContent(originalPostContent);
var metadataProvider = new EmptyModelMetadataProvider();
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var tagHelper = new OptionTagHelper(htmlGenerator)
{
Value = value,
};
// Act & Assert (does not throw)
// Tag helper would throw an NRE if it used ViewContext or Generator values.
await tagHelper.ProcessAsync(tagHelperContext, output);
}
public async Task ProcessAsync_GeneratesExpectedOutput(
string originalContent,
string selected,
string value,
ICollection <string> currentValues,
TagHelperOutput expectedTagHelperOutput)
{
// Arrange
var originalAttributes = new TagHelperAttributeList
{
{ "label", "my-label" },
};
if (selected != null)
{
originalAttributes.Add("selected", selected);
}
var contextAttributes = new TagHelperAttributeList(originalAttributes);
if (value != null)
{
contextAttributes.Add("value", value);
}
var tagHelperContext = new TagHelperContext(
tagName: "option",
allAttributes: contextAttributes,
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
expectedTagHelperOutput.TagName,
originalAttributes,
getChildContentAsync: (useCachedResult, encoder) =>
{
// GetChildContentAsync should not be invoked since we are setting the content below.
Assert.True(false);
return(Task.FromResult <TagHelperContent>(null));
})
{
TagMode = TagMode.StartTagAndEndTag
};
output.Content.SetContent(originalContent);
var metadataProvider = new EmptyModelMetadataProvider();
var htmlGenerator = new TestableHtmlGenerator(metadataProvider);
var viewContext = TestableHtmlGenerator.GetViewContext(
model: null,
htmlGenerator: htmlGenerator,
metadataProvider: metadataProvider);
tagHelperContext.Items[typeof(SelectTagHelper)] = currentValues == null ? null : new CurrentValues(currentValues);
var tagHelper = new OptionTagHelper(htmlGenerator)
{
Value = value,
ViewContext = viewContext,
};
// Act
await tagHelper.ProcessAsync(tagHelperContext, output);
// Assert
Assert.Equal(expectedTagHelperOutput.TagName, output.TagName);
Assert.Equal(expectedTagHelperOutput.Content.GetContent(), output.Content.GetContent());
Assert.Equal(expectedTagHelperOutput.Attributes.Count, output.Attributes.Count);
foreach (var attribute in output.Attributes)
{
Assert.Contains(attribute, expectedTagHelperOutput.Attributes);
}
}
