Compares image pixels against a golden image file.
Instances of this comparator will be used as the backend for matchesGoldenFile when tests are running on Flutter Web, and will usually implemented by deferring the screenshot taking and image comparison to a test server.
Instances of this comparator will be invoked by the test framework in the TestWidgetsFlutterBinding.runAsync zone and are thus not subject to the fake async constraints that are normally imposed on widget tests (i.e. the need or the ability to call WidgetTester.pump to advance the microtask queue). Prior to the invocation, the test framework will render only the Element to be compared on the screen.
double width, double height, Uri golden ) → Future< bool>
Compares the rendered pixels of size
heightthat is being rendered on the top left of the screen against the golden file identified by
Uri key, int version ) → Uri
Returns a new golden file Uri to incorporate any
versionnumber with the
double width, double height, Uri golden ) → Future< void>
Updates the golden file identified by
goldenwith rendered pixels of
Invocation invocation ) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
Returns a string representation of this object.