Add Snapshot class to capture snapshot info

paparazzi-annotations/build.gradle

@@ -1,2 +1,7 @@
 apply plugin: 'org.jetbrains.kotlin.jvm'
+apply plugin: 'org.jetbrains.kotlin.plugin.compose'
 apply plugin: 'com.vanniktech.maven.publish'
+
+dependencies {
+  implementation libs.compose.runtime
+}

paparazzi-gradle-plugin/src/main/java/app/cash/paparazzi/gradle/PaparazziPlugin.kt

@@ -60,6 +60,7 @@ public class PaparazziPlugin @Inject constructor(
   private val buildOperationRunner: BuildOperationRunner,
   private val buildOperationExecutor: BuildOperationExecutor
 ) : Plugin<Project> {
+
   override fun apply(project: Project) {
     val supportedPlugins = listOf("com.android.application", "com.android.library", "com.android.dynamic-feature")
     project.afterEvaluate {

paparazzi-preview-runtime/api/paparazzi-preview-runtime.api

@@ -1,10 +1,13 @@
-public final class app/cash/paparazzi/preview/runtime/PaparazziPreviewData {
+public abstract interface class app/cash/paparazzi/preview/runtime/PaparazziPreviewData {
+}
+
+public final class app/cash/paparazzi/preview/runtime/PaparazziPreviewData$Default : app/cash/paparazzi/preview/runtime/PaparazziPreviewData {
 	public static final field $stable I
 	public fun <init> (Ljava/lang/String;Lkotlin/jvm/functions/Function2;)V
 	public final fun component1 ()Ljava/lang/String;
 	public final fun component2 ()Lkotlin/jvm/functions/Function2;
-	public final fun copy (Ljava/lang/String;Lkotlin/jvm/functions/Function2;)Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData;
-	public static synthetic fun copy$default (Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData;Ljava/lang/String;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData;
+	public final fun copy (Ljava/lang/String;Lkotlin/jvm/functions/Function2;)Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData$Default;
+	public static synthetic fun copy$default (Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData$Default;Ljava/lang/String;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData$Default;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getComposable ()Lkotlin/jvm/functions/Function2;
 	public final fun getSnapshotName ()Ljava/lang/String;

paparazzi-preview-runtime/src/main/java/app/cash/paparazzi/preview/runtime/PaparazziPreviewData.kt

@@ -2,7 +2,17 @@ package app.cash.paparazzi.preview.runtime
 
 import androidx.compose.runtime.Composable
 
-public data class PaparazziPreviewData(
-  val snapshotName: String,
-  val composable: @Composable () -> Unit
-)
+/**
+ * Represents composables annotated with @Paparazzi annotation
+ *
+ * Default - Represents a composable with no parameters
+ */
+public sealed interface PaparazziPreviewData {
+
+  public data class Default(
+    val snapshotName: String,
+    val composable: @Composable () -> Unit
+  ) : PaparazziPreviewData {
+    override fun toString(): String = snapshotName
+  }
+}

paparazzi-preview-test-junit/api/paparazzi-preview-test-junit.api

@@ -0,0 +1,11 @@
+public class app/cash/paparazzi/preview/PaparazziValuesProvider : com/google/testing/junit/testparameterinjector/TestParameterValuesProvider {
+	public static final field $stable I
+	public fun <init> (Ljava/util/List;)V
+	protected fun provideValues (Lcom/google/testing/junit/testparameterinjector/TestParameterValuesProvider$Context;)Ljava/util/List;
+}
+
+public final class app/cash/paparazzi/preview/SnapshotKt {
+	public static final fun snapshot (Lapp/cash/paparazzi/Paparazzi;Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData;Ljava/lang/String;)V
+	public static synthetic fun snapshot$default (Lapp/cash/paparazzi/Paparazzi;Lapp/cash/paparazzi/preview/runtime/PaparazziPreviewData;Ljava/lang/String;ILjava/lang/Object;)V
+}
+

paparazzi-preview-test-junit/build.gradle

@@ -0,0 +1,10 @@
+apply plugin: 'org.jetbrains.kotlin.jvm'
+apply plugin: 'org.jetbrains.kotlin.plugin.compose'
+apply plugin: 'com.vanniktech.maven.publish'
+
+dependencies {
+  compileOnly libs.compose.runtime
+  implementation projects.paparazzi
+  implementation projects.paparazziPreviewRuntime
+  api libs.testParameterInjector
+}

paparazzi-preview-test-junit/gradle.properties

@@ -0,0 +1,4 @@
+POM_ARTIFACT_ID=paparazzi-preview-test-junit
+POM_NAME=Paparazzi Preview Test JUnit
+POM_DESCRIPTION=Adds helpers to use in code generated from Paparazzi Gradle Plugin for composables annotated with @Paparazzi
+POM_PACKAGING=jar

paparazzi-preview-test-junit/src/main/java/app/cash/paparazzi/preview/Snapshot.kt

@@ -0,0 +1,29 @@
+// Copyright Square, Inc.
+package app.cash.paparazzi.preview
+
+import app.cash.paparazzi.Paparazzi
+import app.cash.paparazzi.preview.runtime.PaparazziPreviewData
+import com.google.testing.junit.testparameterinjector.TestParameterValuesProvider
+
+/**
+ * Take a snapshot of the given [previewData].
+ */
+public fun Paparazzi.snapshot(previewData: PaparazziPreviewData, name: String? = null) {
+  when (previewData) {
+    is PaparazziPreviewData.Default -> snapshotDefault(previewData, name)
+  }
+}
+
+/**
+ * A `@TestParameter` values provider for the given [annotations].
+ *
+ * Example usage:
+ * ```
+ * private class ValuesProvider : PaparazziValuesProvider(paparazziAnnotations)
+ * ```
+ */
+public open class PaparazziValuesProvider(
+  private val annotations: List<PaparazziPreviewData>
+) : TestParameterValuesProvider() {
+  override fun provideValues(context: Context?): MutableList<*> = annotations.toMutableList()
+}

paparazzi-preview-test-junit/src/main/java/app/cash/paparazzi/preview/Utils.kt

@@ -0,0 +1,11 @@
+// Copyright Square, Inc.
+package app.cash.paparazzi.preview
+
+import app.cash.paparazzi.Paparazzi
+import app.cash.paparazzi.preview.runtime.PaparazziPreviewData
+
+internal fun Paparazzi.snapshotDefault(previewData: PaparazziPreviewData.Default, name: String?) {
+  snapshot(name) {
+    previewData.composable()
+  }
+}

settings.gradle

@@ -22,6 +22,7 @@ include ':paparazzi-gradle-plugin'
 include ':paparazzi-preview-lints'
 include ':paparazzi-preview-processor'
 include ':paparazzi-preview-runtime'
+include ':paparazzi-preview-test-junit'
 
 include ':sample'