Add Testing folder in docs

docs/getting-started.md

@@ -1,3 +1,9 @@
+---
+id: getting-started
+title: Getting started
+sidebar_position: 1
+---
+
 # DHIS2 Mobile UI
 
 > **@dhis2/dhis2-mobile-ui** is

docs/testing/_category_.yml

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+position: 2
+label: 'Testing'

docs/testing/recomposition.md

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+---
+id: recomposition
+title: Recomposition
+sidebar_position: 1
+---
+
+# Recomposition
+
+The Compose Compiler plugin can generate reports / metrics around certain compose-specific concepts
+that can be useful to understand what is happening with some of your compose code at a fine-grained
+level.
+You can read more about
+it [here](https://github.com/androidx/androidx/blob/androidx-main/compose/compiler/design/compiler-metrics.md).
+
+To generate the reports / metrics, run the following Gradle command
+
+```shell
+./gradlew assembleDebug -PenableComposeCompilerReports=true
+```
+
+This would generate the output at `<module>/build/compose_metrics`.

docs/testing/screenshot-testing.md

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+---
+id: screenshot-testing
+title: Screenshot testing
+sidebar_position: 2
+---
+
+# Screenshot Testing
+
+We are using [Paparazzi](https://cashapp.github.io/paparazzi/) for screenshot testing.
+
+## Screenshot testing
+
+```kotlin
+class InputChipSnapshotTest {
+
+  @get:Rule
+  val paparazzi = paparazzi()
+
+  @Test
+  fun launchChip() {
+    paparazzi.snapshot {
+      ColumnComponentContainer {
+        InputChip(label = "Label", selected = false, badge = "3")
+        InputChip(label = "Label", selected = true, badge = "3")
+      }
+    }
+  }
+}
+```
+
+## Running tests
+
+`./gradlew designsystem:testDebugUnitTest`
+
+Runs tests and generates an HTML report at `/build/reports/paparazzi/` showing all test runs
+and snapshots.
+
+## Saving golden images to repo
+
+`./gradlew designsystem:recordPaparazziDebug`
+
+Saves snapshots as golden values to a predefined source-controlled location (defaults to
+`/src/test/snapshots`).
+
+## Verifying
+
+`./gradlew designsystem:verifyPaparazziDebug`
+
+Runs tests and verifies against previously-recorded golden values. Failures generate diffs at
+`/build/paparazzi/failures`.