An Android library to render your application screens without a physical device or emulator.
class LaunchViewTest {
@get:Rule
val paparazzi = Paparazzi(
deviceConfig = PIXEL_5,
theme = "android:Theme.Material.Light.NoActionBar"
// ...see docs for more options
)
@Test
fun launchView() {
val view = paparazzi.inflate<LaunchView>(R.layout.launch)
// or...
// val view = LaunchView(paparazzi.context)
view.setModel(LaunchModel(title = "paparazzi"))
paparazzi.snapshot(view)
}
@Test
fun launchComposable() {
paparazzi.snapshot {
MyComposable()
}
}
}See the project website for documentation and APIs.
./gradlew sample:testDebugRuns tests and generates an HTML report at sample/build/reports/paparazzi/ showing all
test runs and snapshots.
./gradlew sample:recordPaparazziDebugSaves snapshots as golden values to a predefined source-controlled location
(defaults to src/test/snapshots).
./gradlew sample:verifyPaparazziDebugRuns tests and verifies against previously-recorded golden values. Failures generate diffs at sample/build/paparazzi/failures.
For more examples, check out the sample project.
It is recommended you use Git LFS to store your snapshots. Here's a quick setup:
brew install git-lfs
git config core.hooksPath # optional, confirm where your git hooks will be installed
git lfs install --local
git lfs track "**/snapshots/**/*.png"
git add .gitattributesOn CI, you might set up something like:
$HOOKS_DIR/pre-receive
# compares files that match .gitattributes filter to those actually tracked by git-lfs
diff <(git ls-files ':(attr:filter=lfs)' | sort) <(git lfs ls-files -n | sort) >/dev/null
ret=$?
if [[ $ret -ne 0 ]]; then
echo >&2 "This remote has detected files committed without using Git LFS. Run 'brew install git-lfs && git lfs install' to install it and re-commit your files.";
exit 1;
fiyour_build_script.sh
if [[ is running snapshot tests ]]; then
# fail fast if files not checked in using git lfs
"$HOOKS_DIR"/pre-receive
git lfs install --local
git lfs pull
fiIf using Jetifier to migrate off Support libraries, add the following to your gradle.properties to
exclude bundled Android dependencies.
android.jetifier.ignorelist=android-base-common,commonWhen taking screenshots of Lottie animations, you need to force Lottie to not run on a background thread, otherwise Paparazzi can throw exceptions #494, #630.
@Before
fun setup() {
LottieTask.EXECUTOR = Executor(Runnable::run)
}Some Composables -- such as GoogleMap() -- check for LocalInspectionMode to short-circuit to a @Preview-safe Composable.
However, Paparazzi does not set LocalInspectionMode globally to ensure that the snapshot represents the true production output, similar to how it overrides View.isInEditMode for legacy views.
As a workaround, we recommend wrapping such a Composable in a custom Composable with a CompositionLocalProvider and setting LocalInspectionMode there.
@Test
fun inspectionModeView() {
paparazzi.snapshot(
CompositionLocalProvider(LocalInspectionMode provides true) {
YourComposable()
}
)
}Our change log has release history.
Using plugin application:
buildscript {
repositories {
mavenCentral()
google()
}
dependencies {
classpath 'app.cash.paparazzi:paparazzi-gradle-plugin:1.3.4'
}
}
apply plugin: 'app.cash.paparazzi'Using the plugins DSL:
plugins {
id 'app.cash.paparazzi' version '1.3.4'
}Snapshots of the development version are available in Sonatype's snapshots repository.
repositories {
// ...
maven {
url 'https://oss.sonatype.org/content/repositories/snapshots/'
}
}Copyright 2019 Square, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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