FakeKernel class
A Syscalls implementation backed by an in-memory model of the GPIO character device.
Enough of the real contract to be worth testing against: line ownership and
EBUSY, masked atomic reads and writes, activeLow inversion, initial
output values applied at request time, and per-line flag and debounce
attributes decoded exactly as the kernel would decode them.
- Implemented types
Constructors
-
FakeKernel(List<
FakeChip> chips) -
Creates a fake kernel exposing
chips. -
FakeKernel.single({String name = 'gpiochip0', String label = 'fake-pinctrl', int lineCount = 8, Map<
int, String> ? lineNames}) -
A fake with one 8-line chip, which is enough for most tests.
factory
Properties
-
chips
→ List<
FakeChip> -
The chips this kernel exposes.
final
- dropNextEvents ↔ int
-
Drops this many upcoming events instead of delivering them, without
reusing their sequence numbers — exactly what the kernel's per-request
FIFO does when it overflows.
getter/setter pair
- errno → int
-
The calling thread's
errno, valid immediately after a failed call.no setteroverride - hashCode → int
-
The hash code for this object.
no setterinherited
-
ioctlLog
→ List<
int> -
Every ioctl request number issued, in order — so a test can assert that
a v1 ioctl was never attempted.
final
- openDescriptors → int
-
Descriptors opened and not yet closed. A leak in the code under test
shows up here.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
close(
int fd) → int -
close(2).override -
ioctl(
int fd, int request, Pointer< Void> argp) → int -
ioctl(2)with a pointer argument.override -
listGpioChipPaths(
) → List< String> -
Lists the GPIO character devices present, as absolute paths.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
open(
String path, int flags) → int -
open(2). Returns a file descriptor, or-1with errno set.override -
openEvents(
int fd) → Future< GpioEventReader> -
Opens a stream of raw edge events for a line-request descriptor.
override
-
read(
int fd, Pointer< Void> buf, int count) → int -
read(2). Returns bytes read, or-1with errno set.override -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited