xplat/js/react-native-github/packages/react-native/ReactAndroid/src/main/jni/react/fabric/SurfaceHandlerBinding.cpp (#58386)

Summary: Pull Request resolved: #58386

Reviewed By: andrewdacenko

Differential Revision: D119044270

fbshipit-source-id: 5a07e75604ababb388c4789a18d0d2ae55e112d6

Author: generatedunixname1563563004708334

packages/react-native/ReactAndroid/src/main/jni/react/fabric/test/SurfaceHandlerBindingTest.cpp

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <react/fabric/SurfaceHandlerBinding.h>
+
+#include <folly/dynamic.h>
+#include <gtest/gtest.h>
+#include <react/renderer/core/LayoutContext.h>
+#include <react/renderer/scheduler/SurfaceHandler.h>
+
+namespace facebook::react {
+
+class SurfaceHandlerBindingTest : public ::testing::Test {
+ protected:
+  SurfaceHandlerBinding makeBinding() {
+    return SurfaceHandlerBinding(/*surfaceId=*/101, "SampleModule");
+  }
+};
+
+TEST_F(
+    SurfaceHandlerBindingTest,
+    testSetLayoutConstraintsMapsJavaArgumentsToSurfaceParameters) {
+  auto binding = makeBinding();
+
+  binding.setLayoutConstraints(
+      /*minWidth=*/10.0f,
+      /*maxWidth=*/320.0f,
+      /*minHeight=*/20.0f,
+      /*maxHeight=*/640.0f,
+      /*offsetX=*/3.0f,
+      /*offsetY=*/4.0f,
+      /*doLeftAndRightSwapInRTL=*/1,
+      /*isRTL=*/1,
+      /*pixelDensity=*/2.0f,
+      /*fontScale=*/1.25f);
+
+  const auto& surfaceHandler = binding.getSurfaceHandler();
+  const auto layoutConstraints = surfaceHandler.getLayoutConstraints();
+  const auto layoutContext = surfaceHandler.getLayoutContext();
+
+  EXPECT_FLOAT_EQ(10.0f, layoutConstraints.minimumSize.width);
+  EXPECT_FLOAT_EQ(20.0f, layoutConstraints.minimumSize.height);
+  EXPECT_FLOAT_EQ(320.0f, layoutConstraints.maximumSize.width);
+  EXPECT_FLOAT_EQ(640.0f, layoutConstraints.maximumSize.height);
+  EXPECT_EQ(LayoutDirection::RightToLeft, layoutConstraints.layoutDirection);
+
+  EXPECT_FLOAT_EQ(3.0f, layoutContext.viewportOffset.x);
+  EXPECT_FLOAT_EQ(4.0f, layoutContext.viewportOffset.y);
+  EXPECT_FLOAT_EQ(320.0f, layoutContext.viewportSize.width);
+  EXPECT_FLOAT_EQ(640.0f, layoutContext.viewportSize.height);
+  EXPECT_TRUE(layoutContext.swapLeftAndRightInRTL);
+  EXPECT_FLOAT_EQ(2.0f, layoutContext.pointScaleFactor);
+  EXPECT_FLOAT_EQ(1.25f, layoutContext.fontSizeMultiplier);
+}
+
+TEST_F(
+    SurfaceHandlerBindingTest,
+    testSetLayoutConstraintsMapsFalsyJavaBooleansToLeftToRightLayout) {
+  auto binding = makeBinding();
+
+  binding.setLayoutConstraints(
+      /*minWidth=*/0.0f,
+      /*maxWidth=*/200.0f,
+      /*minHeight=*/0.0f,
+      /*maxHeight=*/400.0f,
+      /*offsetX=*/0.0f,
+      /*offsetY=*/0.0f,
+      /*doLeftAndRightSwapInRTL=*/0,
+      /*isRTL=*/0,
+      /*pixelDensity=*/1.0f,
+      /*fontScale=*/1.0f);
+
+  const auto& surfaceHandler = binding.getSurfaceHandler();
+
+  EXPECT_EQ(
+      LayoutDirection::LeftToRight,
+      surfaceHandler.getLayoutConstraints().layoutDirection);
+  EXPECT_FALSE(surfaceHandler.getLayoutContext().swapLeftAndRightInRTL);
+}
+
+TEST_F(
+    SurfaceHandlerBindingTest,
+    testSetDisplayModeUpdatesUnderlyingSurfaceDisplayMode) {
+  auto binding = makeBinding();
+
+  binding.setDisplayMode(static_cast<jint>(DisplayMode::Suspended));
+  EXPECT_EQ(
+      DisplayMode::Suspended, binding.getSurfaceHandler().getDisplayMode());
+
+  binding.setDisplayMode(static_cast<jint>(DisplayMode::Visible));
+  EXPECT_EQ(DisplayMode::Visible, binding.getSurfaceHandler().getDisplayMode());
+}
+
+TEST_F(SurfaceHandlerBindingTest, testSetPropsWithNullClearsSurfaceProps) {
+  auto binding = makeBinding();
+  binding.getSurfaceHandler().setProps(folly::dynamic::object("stale", 1));
+
+  binding.setProps(nullptr);
+
+  const auto props = binding.getSurfaceHandler().getProps();
+  ASSERT_TRUE(props.isObject());
+  EXPECT_EQ(0, props.count("stale"));
+}
+
+} // namespace facebook::react