/// <summary>
/// Instantiates a new <see cref="TagHelperContext"/>.
/// </summary>
/// <param name="allAttributes">Every attribute associated with the current HTML element.</param>
/// <param name="items">Collection of items used to communicate with other <see cref="ITagHelper"/>s.</param>
/// <param name="uniqueId">The unique identifier for the source element this <see cref="TagHelperContext" />
/// applies to.</param>
public TagHelperContext(
IEnumerable <IReadOnlyTagHelperAttribute> allAttributes,
IDictionary <object, object> items,
string uniqueId)
{
if (allAttributes == null)
{
throw new ArgumentNullException(nameof(allAttributes));
}
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
if (uniqueId == null)
{
throw new ArgumentNullException(nameof(uniqueId));
}
AllAttributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
allAttributes.Select(attribute => new TagHelperAttribute(attribute.Name, attribute.Value)));
Items = items;
UniqueId = uniqueId;
}
public void IntIndexer_ThrowsIfInvalidIndex(int index)
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
new[]
{
new TagHelperAttribute("a", "av"),
new TagHelperAttribute("b", "bv")
});
// Act & Assert
var exception = Assert.Throws <ArgumentOutOfRangeException>("index", () => attributes[index]);
}
public void IndexOf_ReturnsExpectedResult(
IEnumerable <IReadOnlyTagHelperAttribute> initialAttributes,
IReadOnlyTagHelperAttribute attributeToLookup,
int expected)
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(initialAttributes);
// Act
var index = attributes.IndexOf(attributeToLookup);
// Assert
Assert.Equal(expected, index);
}
public void IntIndexer_ReturnsExpectedAttribute(
IEnumerable <IReadOnlyTagHelperAttribute> initialAttributes,
int indexToLookup,
IReadOnlyTagHelperAttribute expectedAttribute)
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(initialAttributes);
// Act
var attribute = attributes[indexToLookup];
// Assert
Assert.Equal(expectedAttribute, attribute, CaseSensitiveTagHelperAttributeComparer.Default);
}
public void ContainsName_ReturnsExpectedResult(
IEnumerable <IReadOnlyTagHelperAttribute> initialAttributes,
string nameToLookup,
bool expected)
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(initialAttributes);
// Act
var contains = attributes.ContainsName(nameToLookup);
// Assert
Assert.Equal(expected, contains);
}
public void TryGetAttributes_ReturnsExpectedValueAndAttribute(
IEnumerable <IReadOnlyTagHelperAttribute> initialAttributes,
string nameToLookup,
IEnumerable <IReadOnlyTagHelperAttribute> expectedAttributes,
bool expectedResult)
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(initialAttributes);
IEnumerable <IReadOnlyTagHelperAttribute> resolvedAttributes;
// Act
var result = attributes.TryGetAttributes(nameToLookup, out resolvedAttributes);
// Assert
Assert.Equal(expectedResult, result);
Assert.Equal(expectedAttributes, resolvedAttributes, CaseSensitiveTagHelperAttributeComparer.Default);
}
public void Count_ReturnsNumberOfAttributes()
{
// Arrange
var attributes = new ReadOnlyTagHelperAttributeList <IReadOnlyTagHelperAttribute>(
new[]
{
new TagHelperAttribute(),
new TagHelperAttribute(),
new TagHelperAttribute()
});
// Act
var count = attributes.Count;
// Assert
Assert.Equal(3, count);
}
