Move Showkase to a dedicated module for ui tests.

tests/uitests/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) 2022 New Vector Ltd
+  ~
+  ~ 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.
+  -->
+
+<manifest/>

tests/uitests/src/main/java/io/element/android/x/tests/uitests/ElementXShowkaseRootModule.kt

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+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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.
+ */
+
+package io.element.android.x.tests.uitests
+
+import com.airbnb.android.showkase.annotation.ShowkaseRoot
+import com.airbnb.android.showkase.annotation.ShowkaseRootModule
+
+@ShowkaseRoot
+class ElementXShowkaseRootModule : ShowkaseRootModule

tests/uitests/src/main/java/io/element/android/x/tests/uitests/ShowkaseButton.kt

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+package io.element.android.x.tests.uitests
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun ShowkaseButton(
+    onClick: () -> Unit,
+) {
+    var isShowkaseButtonVisible by remember { mutableStateOf(BuildConfig.DEBUG) }
+
+    if (isShowkaseButtonVisible) {
+        Button(
+            modifier = Modifier
+                .padding(top = 32.dp, start = 16.dp),
+            onClick = onClick
+        ) {
+            Text(text = "Showkase Browser")
+            IconButton(
+                modifier = Modifier
+                    .padding(start = 8.dp)
+                    .size(16.dp),
+                onClick = { isShowkaseButtonVisible = false },
+            ) {
+                Icon(imageVector = Icons.Filled.Close, contentDescription = "")
+            }
+        }
+    }
+}

tests/uitests/src/main/java/io/element/android/x/tests/uitests/ShowkaseNavigation.kt

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+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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.
+ */
+
+package io.element.android.x.tests.uitests
+
+import android.app.Activity
+import com.airbnb.android.showkase.models.Showkase
+
+fun openShowkase(activity: Activity) {
+    activity.startActivity(Showkase.getBrowserIntent(activity))
+}

tests/uitests/src/test/java/io/element/android/x/tests/uitests/ComposePapparazziTest.kt

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+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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.
+ */
+
+package io.element.android.x.tests.uitests
+
+import android.os.Build
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.unit.Density
+import app.cash.paparazzi.DeviceConfig.Companion.PIXEL_5
+import app.cash.paparazzi.Paparazzi
+import app.cash.paparazzi.androidHome
+import app.cash.paparazzi.detectEnvironment
+import com.airbnb.android.showkase.models.Showkase
+import com.airbnb.android.showkase.models.ShowkaseBrowserComponent
+import com.google.testing.junit.testparameterinjector.TestParameter
+import com.google.testing.junit.testparameterinjector.TestParameterInjector
+import io.element.android.x.designsystem.ElementXTheme
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+class ComponentPreview(
+    private val showkaseBrowserComponent: ShowkaseBrowserComponent
+) {
+    val content: @Composable () -> Unit = showkaseBrowserComponent.component
+    override fun toString(): String =
+        showkaseBrowserComponent.group + ":" + showkaseBrowserComponent.componentName
+}
+
+@RunWith(TestParameterInjector::class)
+class ComposePaparazziTests {
+
+    object PreviewProvider : TestParameter.TestParameterValuesProvider {
+        override fun provideValues(): List<ComponentPreview> =
+            Showkase.getMetadata().componentList.map(::ComponentPreview)
+    }
+
+    @get:Rule
+    val paparazzi = Paparazzi(
+        // Apply trick from https://github.com/cashapp/paparazzi/issues/489#issuecomment-1195674603
+        environment = detectEnvironment().copy(
+            platformDir = "${androidHome()}/platforms/android-32",
+            compileSdkVersion = Build.VERSION_CODES.S_V2 /* 32 */
+        ),
+        maxPercentDifference = 0.0,
+        deviceConfig = PIXEL_5.copy(softButtons = false),
+    )
+
+    @Test
+    fun preview_tests(
+        @TestParameter(valuesProvider = PreviewProvider::class) componentPreview: ComponentPreview,
+        @TestParameter(value = ["1.0", "1.5"]) fontScale: Float,
+        @TestParameter(value = ["light", "dark"]) theme: String,
+        // TODO Test other languages
+    ) {
+        paparazzi.snapshot {
+            CompositionLocalProvider(
+                LocalInspectionMode provides true,
+                LocalDensity provides Density(
+                    density = LocalDensity.current.density,
+                    fontScale = fontScale
+                )
+            ) {
+                ElementXTheme(darkTheme = (theme == "dark")) {
+                    componentPreview.content()
+                }
+            }
+        }
+    }
+}