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# Installed tests
A test suite that can be used to interact with a fake device is installed when
configured with `-Dbuild=all` and `-Dtests=true`.
The test files have been signed by the production LVFS instance, and are available here:
* <https://fwupd.org/downloads/07ee357a95dd3bd400a2bd8ba329491e5791dbcf4590215ddd75566c6ed1f958-fakedevice123.cab>
* <https://fwupd.org/downloads/a92d4f433e925ea8e4a10d25dfa58e64ba1e68d07ee963605a2ccbaa2e3185aa-fakedevice124.cab>
By default this test suite is disabled.
## Enabling
To enable the test suite:
```shell
fwupdtool enable-test-devices
```
## Using test suite
When the daemon is started with the test suite enabled a fake webcam device will be created with a pending update.
```text
Integrated Webcam™
DeviceId: 08d460be0f1f9f128413f816022a6439e0078018
Guid: b585990a-003e-5270-89d5-3705a17f9a43
Summary: A fake webcam
Plugin: test
Flags: updatable|supported|registered
Vendor: ACME Corp.
VendorId: USB:0x046D
Version: 1.2.2
VersionLowest: 1.2.0
VersionBootloader: 0.1.2
Icon: preferences-desktop-keyboard
Created: 2018-11-29
```
## Upgrading
This can be upgraded to a firmware version `1.2.4` by using `fwupdmgr update` or any fwupd frontend.
```shell
$ fwupdmgr get-updates
Integrated Webcam™ has firmware updates:
GUID: b585990a-003e-5270-89d5-3705a17f9a43
ID: fakedevice.firmware
Update Version: 1.2.4
Update Name: FakeDevice Firmware
Update Summary: Firmware for the ACME Corp Integrated Webcam
Update Remote ID: fwupd-tests
Update Checksum: SHA1(fc0aabcf98bf3546c91270f2941f0acd0395dd79)
Update Location: ./fakedevice124.cab
Update Description: Fixes another bug with the flux capacitor to prevent time going backwards.
$ fwupdmgr update
Decompressing… [***************************************]
Authenticating… [***************************************]
Updating Integrated Webcam™… ]
Verifying… [***************************************] Less than one minute remaining…
```
## Downgrading
It can also be downgraded to firmware version `1.2.3`.
```shell
$ fwupdmgr downgrade
Choose a device:
0. Cancel
1. 08d460be0f1f9f128413f816022a6439e0078018 (Integrated Webcam™)
2. 8a21cacfb0a8d2b30c5ee9290eb71db021619f8b (XPS 13 9370 System Firmware)
3. d10c5f0ed12c6dc773f596b8ac51f8ace4355380 (XPS 13 9370 Thunderbolt Controller)
1
Decompressing… [***************************************]
Authenticating… [***************************************]
Downgrading Integrated Webcam™… \ ]
Verifying… [***************************************] Less than one minute remaining…
|
