Add iOS change list renderer tests

redwood-treehouse-host/build.gradle

@@ -7,6 +7,7 @@ apply plugin: 'app.cash.zipline'
 apply plugin: 'app.cash.redwood.build'
 
 redwoodBuild {
+  composeCompiler()
   publishing()
 }
 
@@ -40,6 +41,13 @@ kotlin {
         implementation libs.assertk
         implementation libs.kotlinx.coroutines.test
         implementation libs.turbine
+        implementation projects.redwoodCompose
+        implementation projects.redwoodLayoutUiview
+        implementation projects.redwoodTesting
+        implementation projects.testSchema.compose
+        implementation projects.testSchema.composeProtocol
+        implementation projects.testSchema.testing
+        implementation projects.testSchema.widgetProtocol
       }
     }
     androidUnitTest {

redwood-treehouse-host/src/iosTest/kotlin/app/cash/redwood/treehouse/ChangeListRendererTest.kt

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+package app.cash.redwood.treehouse
+
+import app.cash.redwood.testing.toChangeList
+import assertk.assertThat
+import assertk.assertions.isEqualTo
+import example.redwood.compose.ExampleSchemaProtocolBridge
+import example.redwood.compose.Row
+import example.redwood.compose.Text
+import example.redwood.widget.ExampleSchemaTester
+import kotlin.test.Test
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import platform.UIKit.UILabel
+import platform.UIKit.UIStackView
+import platform.UIKit.UIView
+
+class ChangeListRendererTest {
+  @Test fun createSnapshotChangeListAndRenderIt() = runTest {
+    ExampleSchemaTester {
+      setContent {
+        Text("hello")
+      }
+      val snapshot = awaitSnapshot()
+      val snapshotChangeList = snapshot.toChangeList(ExampleSchemaProtocolBridge)
+
+      val treehouseUIKitView = TreehouseUIKitView(ExampleSchemaWidgetSystem())
+
+      val renderer = ChangeListRenderer<UIView>(Json)
+      renderer.render(treehouseUIKitView, snapshotChangeList)
+
+      val uiView = treehouseUIKitView.view
+      assertThat((uiView.subviews.firstOrNull() as? UILabel)?.text).isEqualTo("hello")
+    }
+  }
+
+  @Test fun renderSnapshotChangeListWithSubviews() = runTest {
+    ExampleSchemaTester {
+      setContent {
+        Row {
+          Text("red")
+          Text("orange")
+          Text("yellow")
+        }
+      }
+      val snapshot = awaitSnapshot()
+      val snapshotChangeList = snapshot.toChangeList(ExampleSchemaProtocolBridge)
+
+      val treehouseUIKitView = TreehouseUIKitView(ExampleSchemaWidgetSystem())
+
+      val renderer = ChangeListRenderer<UIView>(Json)
+      renderer.render(treehouseUIKitView, snapshotChangeList)
+
+      val uiView = treehouseUIKitView.view
+      val row = uiView.subviews.firstOrNull() as UIStackView
+      assertThat((row.subviews[0] as? UILabel)?.text).isEqualTo("red")
+      assertThat((row.subviews[1] as? UILabel)?.text).isEqualTo("orange")
+      assertThat((row.subviews[2] as? UILabel)?.text).isEqualTo("yellow")
+    }
+  }
+}

redwood-treehouse-host/src/iosTest/kotlin/app/cash/redwood/treehouse/DefaultExampleSchemaWidgetFactory.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+package app.cash.redwood.treehouse
+
+import example.redwood.widget.Button
+import example.redwood.widget.Button2
+import example.redwood.widget.ExampleSchemaWidgetFactory
+import example.redwood.widget.Row
+import example.redwood.widget.ScopedRow
+import example.redwood.widget.Space
+import example.redwood.widget.Text
+import example.redwood.widget.TextInput
+import platform.UIKit.UIView
+
+class DefaultExampleSchemaWidgetFactory : ExampleSchemaWidgetFactory<UIView> {
+  override fun Row(): Row<UIView> = RowBinding()
+  override fun ScopedRow(): ScopedRow<UIView> = TODO("Not yet implemented")
+  override fun Text(): Text<UIView> = TextBinding()
+  override fun Button(): Button<UIView> = TODO("Not yet implemented")
+  override fun Button2(): Button2<UIView> = TODO("Not yet implemented")
+  override fun TextInput(): TextInput<UIView> = TODO("Not yet implemented")
+  override fun Space(): Space<UIView> = TODO("Not yet implemented")
+}

redwood-treehouse-host/src/iosTest/kotlin/app/cash/redwood/treehouse/ExampleSchemaWidgetSystem.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+package app.cash.redwood.treehouse
+
+import app.cash.redwood.layout.uiview.UIViewRedwoodLayoutWidgetFactory
+import app.cash.redwood.protocol.widget.ProtocolMismatchHandler
+import app.cash.redwood.protocol.widget.ProtocolNode
+import example.redwood.widget.ExampleSchemaProtocolNodeFactory
+import example.redwood.widget.ExampleSchemaWidgetFactories
+import kotlinx.serialization.json.Json
+
+/** Basic UIView implementation of the example schema, for testing. */
+class ExampleSchemaWidgetSystem : TreehouseView.WidgetSystem {
+  override fun widgetFactory(
+    json: Json,
+    protocolMismatchHandler: ProtocolMismatchHandler,
+  ): ProtocolNode.Factory<*> {
+    return ExampleSchemaProtocolNodeFactory(
+      provider = ExampleSchemaWidgetFactories(
+        ExampleSchema = DefaultExampleSchemaWidgetFactory(),
+        RedwoodLayout = UIViewRedwoodLayoutWidgetFactory(),
+      ),
+    )
+  }
+}

redwood-treehouse-host/src/iosTest/kotlin/app/cash/redwood/treehouse/RowBinding.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+package app.cash.redwood.treehouse
+
+import app.cash.redwood.Modifier
+import app.cash.redwood.widget.UIViewChildren
+import app.cash.redwood.widget.Widget
+import example.redwood.widget.Row
+import platform.UIKit.UIStackView
+import platform.UIKit.UIView
+
+/** Note: this doesn't bother to arrange child views horizontally! */
+class RowBinding : Row<UIView> {
+  override val value = UIStackView()
+
+  override var modifier: Modifier = Modifier
+
+  override val children: Widget.Children<UIView> = UIViewChildren(value)
+}

redwood-treehouse-host/src/iosTest/kotlin/app/cash/redwood/treehouse/TextBinding.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+package app.cash.redwood.treehouse
+
+import app.cash.redwood.Modifier
+import example.redwood.widget.Text
+import platform.UIKit.UILabel
+import platform.UIKit.UIView
+
+class TextBinding : Text<UIView> {
+  override val value = UILabel()
+  override var modifier: Modifier = Modifier
+
+  override fun text(text: String?) {
+    value.text = text ?: ""
+  }
+}