- cleanup duplicate code now that #2445 is fixed
- update unit tests using old `ModelBindingContext` setups
- fix (just) one integration test where `MutableObjectModelBinder` incorrectly calculated
`isTopLevelObject` and returned a non-`null` model
- undo temporary changes in `BodyModelBinderTests` due to increased reliance on incorrect
`isTopLevelObject` in #2445 fix
nits:
- combine tests that are now duplicates
- beef up coverage of some `MutableObjectModelBinderTest` cases
- remove unused `using`s
- part II of II for #2445
- `FormCollectionModelBinder` is an exception because container is not user-provided
- no `ModelState` entry added
- enable tests that #2445 was blocking
- fix these and other tests expecting different `ModelState` entries
- simplify logic in `FormFileModelBinder`
`ValueProviderResult`
- remove `protected` setters and parameterless constructor
- no scenario for their use in subclasses; however `ConvertTo()` remains `virtual`
- add single-parameter constructor
- use in most of the greedy and type-matching model binders
- add doc comments throughout class
nits:
- use new `ValueProviderResult` constructor in many existing tests
- `""` -> `string.Empty` and `vpr` -> `valueProviderResult` in `ValueProviderResultTest`
- improve some test names in `BodyValidationIntegrationTests`
- do not check `Message` of a Json.NET `Exception`
- part I of II for #2445 (with a duplicate code PR to follow)
- needed for #2445 because new `ModelState` entries for values will make inconsisteny worse
- change `BodyModelBinder` to use same keys for all `ModelBindingResult`s and `ModelState` entries
- return fatal error result if formatter adds an error to `ModelState`
- update potential callers to avoid avoid ignoring `IsFatalError`
- fix test attempting to serialize all of `ModelState`
- will be borked with additional `RawValue`s in state
- fix two other tests that serialized `ModelState` but checked only `IsValid`
nits:
- address minor inconsistencies in `ModelBindingContext`
- use `System.Reflection.Extensions` package a bit more, where it's already referenced
- remove some unused resources