mirror of
https://github.com/SchildiChat/SchildiChat-android.git
synced 2024-12-29 11:02:35 +01:00
73 lines
2.3 KiB
Markdown
73 lines
2.3 KiB
Markdown
# Screenshot testing
|
|
|
|
<!--- TOC -->
|
|
|
|
* [Overview](#overview)
|
|
* [Setup](#setup)
|
|
* [Recording](#recording)
|
|
* [Verifying](#verifying)
|
|
* [Contributing](#contributing)
|
|
* [Example](#example)
|
|
|
|
<!--- END -->
|
|
|
|
## Overview
|
|
|
|
- Screenshot tests are tests which record the content of a rendered screen and verify subsequent runs to check if the screen renders differently.
|
|
- Element uses [Paparazzi](https://github.com/cashapp/paparazzi) to render, record and verify android layouts.
|
|
- The screenshot verification occurs on every pull request as part of the `tests.yml` workflow.
|
|
|
|
## Setup
|
|
|
|
- Install Git LFS through your package manager of choice (`brew install git-lfs` | `yay -S git-lfs`).
|
|
- Install the Git LFS hooks into the project.
|
|
|
|
```bash
|
|
# with element-android as the current working directory
|
|
git lfs install --local
|
|
```
|
|
|
|
- If installed correctly, `git push` and `git pull` will now include LFS content.
|
|
|
|
## Recording
|
|
|
|
- `./gradlew recordScreenshots`
|
|
- Paparazzi will generate images in `${module}/src/test/snapshots`, which will need to be committed to the repository using Git LFS.
|
|
|
|
## Verifying
|
|
|
|
- `./gradlew verifyScreenshots`
|
|
- In the case of failure, Paparazzi will generate images in `${module}/out/failure`. The images will show the expected and actual screenshots along with a delta of the two images.
|
|
|
|
## Contributing
|
|
|
|
- When creating a test, the file (and class) name names must include `ScreenshotTest`, eg `ItemScreenshotTest`.
|
|
- After creating the new test, record and commit the newly rendered screens.
|
|
- `./tools/validate_lfs` can be ran to ensure everything is working correctly with Git LFS, the CI also runs this check.
|
|
|
|
## Example
|
|
|
|
```kotlin
|
|
class PaparazziExampleScreenshotTest {
|
|
|
|
@get:Rule
|
|
val paparazzi = Paparazzi(
|
|
deviceConfig = PIXEL_3,
|
|
theme = "Theme.Vector.Light",
|
|
)
|
|
|
|
@Test
|
|
fun `example paparazzi test`() {
|
|
// Inflate the layout
|
|
val view = paparazzi.inflate<ConstraintLayout>(R.layout.item_radio)
|
|
|
|
// Bind data to the view
|
|
view.findViewById<TextView>(R.id.actionTitle).text = paparazzi.resources.getString(R.string.room_settings_all_messages)
|
|
view.findViewById<ImageView>(R.id.radioIcon).setImageResource(R.drawable.ic_radio_on)
|
|
|
|
// Record the bound view
|
|
paparazzi.snapshot(view)
|
|
}
|
|
}
|
|
```
|