public async Task ProcessAsync_WithValueAndAspFor_RendersTextAreaWithValue()
{
// Arrange
var modelValue = "Foo value";
var model = new Model()
{
Foo = modelValue
};
var modelExplorer = new EmptyModelMetadataProvider().GetModelExplorerForType(typeof(Model), model)
.GetExplorerForProperty(nameof(Model.Foo));
var viewContext = new ViewContext();
var modelExpression = nameof(Model.Foo);
var modelHelper = new Mock <IModelHelper>();
modelHelper.Setup(mock => mock.GetModelValue(viewContext, modelExplorer, modelExpression)).Returns(modelValue);
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var characterCountContext = context.GetContextItem <CharacterCountContext>();
characterCountContext.SetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
characterCountContext.SetValue(new HtmlString("Value"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper(modelHelper: modelHelper.Object)
{
AspFor = new ModelExpression(modelExpression, modelExplorer),
Name = "my-name",
MaxWords = 10,
ViewContext = viewContext
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var element = output.RenderToElement();
var textarea = element.GetElementsByTagName("textarea")[0];
Assert.Equal("Value", textarea.InnerHtml);
}
public async Task ProcessAsync_WithMaxLengthGeneratesExpectedOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var formGroupContext = (TextAreaBuilder)context.Items[typeof(FormGroupBuilder)];
formGroupContext.TrySetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
formGroupContext.TrySetElementContent(new HtmlString("The content"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper(new DefaultGovUkHtmlGenerator(), new DefaultModelHelper())
{
Id = "my-id",
Name = "my-name",
MaxLength = 200,
Threshold = 90
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var html = output.AsString();
var node = HtmlNode.CreateNode(html);
Assert.Equal("govuk-character-count", node.Attributes["class"].Value);
Assert.Equal("govuk-character-count", node.Attributes["data-module"].Value);
Assert.Equal("200", node.Attributes["data-maxlength"].Value);
Assert.Equal("90", node.Attributes["data-threshold"].Value);
Assert.DoesNotContain(node.Attributes, a => a.Name == "data-maxwords");
var textarea = node.ChildNodes.FindFirst("textarea");
Assert.Contains("govuk-js-character-count", textarea.GetCssClasses());
var hint = node.SelectSingleNode("//div[contains(@class, 'govuk-hint')]");
Assert.Equal("my-id-info", hint.Id);
Assert.Contains("govuk-character-count__message", hint.GetCssClasses());
Assert.Equal("polite", hint.Attributes["aria-live"].Value);
Assert.Equal("You can enter up to 200 characters", hint.InnerText);
}
public async Task ProcessAsync_WithMaxLength_GeneratesExpectedOutput()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var characterCountContext = context.GetContextItem <CharacterCountContext>();
characterCountContext.SetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
characterCountContext.SetHint(
attributes: null,
content: new HtmlString("The hint"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper()
{
Id = "my-id",
Name = "my-name",
MaxLength = 200,
Threshold = 90
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var expectedHtml = @"
<div class=""govuk-character-count"" data-module=""govuk-character-count"" data-maxlength=""200"" data-threshold=""90"">
<div class=""govuk-form-group"">
<label class=""govuk-label"" for=""my-id"">The label</label>
<div class=""govuk-hint"" id=""my-id-hint"">The hint</div>
<textarea class=""govuk-textarea govuk-js-character-count"" id=""my-id"" name=""my-name"" rows=""5"" aria-describedby=""my-id-hint""></textarea>
</div>
<div id=""my-id-info"" class=""govuk-hint govuk-character-count__message"">
You can enter up to 200 characters
</div>
</div>";
AssertEx.HtmlEqual(expectedHtml, output.RenderToString());
}
public async Task ProcessAsync_BothMaxLengthAndMaxWords_ThrowsInvalidOperationException()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var characterCountContext = context.GetContextItem <CharacterCountContext>();
characterCountContext.SetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
characterCountContext.SetHint(
attributes: null,
content: new HtmlString("The hint"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper()
{
Id = "my-id",
Name = "my-name",
MaxLength = 100,
MaxWords = 10
};
// Act
var ex = await Record.ExceptionAsync(() => tagHelper.ProcessAsync(context, output));
// Assert
Assert.IsType <InvalidOperationException>(ex);
Assert.Equal("Only one of the 'max-length' or 'max-words' attributes can be specified.", ex.Message);
}
public async Task ProcessAsync_WithValue_RendersTextAreaWithValue()
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var characterCountContext = context.GetContextItem <CharacterCountContext>();
characterCountContext.SetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
characterCountContext.SetValue(new HtmlString("Value"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper()
{
Name = "my-name",
MaxWords = 10,
};
// Act
await tagHelper.ProcessAsync(context, output);
// Assert
var element = output.RenderToElement();
var textarea = element.GetElementsByTagName("textarea")[0];
Assert.Equal("Value", textarea.InnerHtml);
}
public async Task ProcessAsync_ThresholdInvalidThrowsInvalidOperationException(decimal threshold)
{
// Arrange
var context = new TagHelperContext(
tagName: "govuk-character-count",
allAttributes: new TagHelperAttributeList(),
items: new Dictionary <object, object>(),
uniqueId: "test");
var output = new TagHelperOutput(
"govuk-character-count",
attributes: new TagHelperAttributeList(),
getChildContentAsync: (useCachedResult, encoder) =>
{
var formGroupContext = (TextAreaBuilder)context.Items[typeof(FormGroupBuilder)];
formGroupContext.TrySetLabel(
isPageHeading: false,
attributes: null,
content: new HtmlString("The label"));
formGroupContext.TrySetElementContent(new HtmlString("The content"));
var tagHelperContent = new DefaultTagHelperContent();
return(Task.FromResult <TagHelperContent>(tagHelperContent));
});
var tagHelper = new CharacterCountTagHelper(new DefaultGovUkHtmlGenerator(), new DefaultModelHelper())
{
Id = "my-id",
Name = "my-name",
MaxWords = 10,
Threshold = threshold
};
// Act & Assert
var ex = await Assert.ThrowsAsync <InvalidOperationException>(() => tagHelper.ProcessAsync(context, output));
Assert.Equal("The 'threshold' attribute is invalid.", ex.Message);
}
