- aspnet/Razor#643 part 2: react to aspnet/Razor#653
- change test calls and delegates to include new parameter
- add tests specifically of the new feature
- add tag helpers using new feature to `TagHelpersTest` functional test
- note `HtmlEncoder`s used elsewhere e.g. in other `RazorPage` instances are unaffected
- i.e. changing one `RazorPage.HtmlEncoder` property only affects C# expressions in that page
Also simplify scope management, removing bizarre assertion when user does something odd.
nits:
- correct `// Act` and `// Act & Assert` content
- remove #YOLO wrapping
- #643 part 1
- change is viral and requires an update to `RazorPage.StartTagHelperWritingScope()`
- memoize `GetChildContentAsync()` per-encoder
- update generation tests to match and to test new behaviour
- note `HtmlEncoder`s used elsewhere e.g. in other `RazorPage` instances are unaffected
Add `NullHtmlEncoder`
Nits:
- generally clean up affected doc comments and make them more consistent
- remove unused `using`s in files I had open
- moving command logic to a dedicated class
- adding logic for reading webroot value from a parameter, hosting.json file and folder structure
- reading application name from project.json instead of a parameter
- #3386
- initialize comparison `HashSet` with unencoded values to ensure both are checked
- address perf and correctness issues in this code
- `context.Items[typeof(SelectTagHelper)]` entry read as `ICollection` but written as `IReadOnlyCollection`
- `IReadOnlyCollection` worse because it does not include `Contains()`, causing Linq use
- every `<option>` element recalculated the encoded values and created a `HashSet` to contain them
- add `CurrentValues` type to cache this `HashSet` in `context.Items`
- each `OptionTagHelper` created the additional `HashSet` even if `Value` was bound