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summary: Ensure that the framebuffer interface works.
details: |
The framebuffer interface allows to access the /dev/fb* buffer files.
The test uses the test-snapd-framebuffer snap to write/read from /dev/fb0.
The test also checks the interface connection and disconnection works properly.
prepare: |
"$TESTSTOOLS"/snaps-state install-local test-snapd-framebuffer
execute: |
echo "The plug is not connected by default"
snap interfaces -i framebuffer | MATCH '^- +test-snapd-framebuffer:framebuffer'
if [ ! -e /dev/fb0 ]; then
# ensure this test runs on at least one system
if [[ "$SPREAD_SYSTEM" = ubuntu-core-16-arm-* ]]; then
echo "ubuntu-core-16-arm-32 must have a framebuffer"
exit 1
fi
echo "SKIP: Framebuffer not available on /dev/fb0"
exit 0
fi
echo "When the interface is connected"
snap connect test-snapd-framebuffer:framebuffer
echo "Then the snap is able to write in the framebuffer"
test-snapd-framebuffer.write "123"
MATCH "123" < /dev/fb0
echo "Then the snap is able to read from the framebuffer"
test-snapd-framebuffer.read
if [ "$(snap debug confinement)" = partial ] ; then
exit 0
fi
echo "When the plug is disconnected"
snap disconnect test-snapd-framebuffer:framebuffer
echo "Then the snap is not able to access the framebuffer"
if test-snapd-framebuffer.write "123" 2> call.error; then
echo "Expected permission error trying to write the framebuffer"
exit 1
fi
MATCH "Permission denied" < call.error
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