BackendRegistration class final
What registerBackendOpener hands back, so a registration can be taken off again.
It exists because a registry with no way out is a registry that leaks
across tests. An application registers its backends once at startup and
never wants this. A test does: very_good test runs an entire package's
suite in one process, so a backend registered by one test file is still
registered for every file after it — and a fake that draws nothing,
registered to keep a widget test off the software rasteriser, silently
becomes the backend a later test's picture is drawn with. That is a
green test asserting on an empty frame, which is the worst kind.
Idempotent: calling undo twice removes one registration, not two, and removing one that something else already replaced does nothing.
Properties
- asFallback → bool
-
Whether this took the single fallback slot rather than joining the
preferred list.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
undo(
) → void
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited