Add flow test fixtures and tests (flutter#13986)

BUILD.gn

@@ -95,7 +95,10 @@ group("flutter") {
 
   # Fuchsia currently only supports a subset of our unit tests
   if (is_fuchsia) {
-    public_deps += [ "$flutter_root/fml:fml_tests" ]
+    public_deps += [
+      "$flutter_root/flow:flow_tests",
+      "$flutter_root/fml:fml_tests",
+    ]
   }
 }
 

ci/licenses_golden/licenses_flutter

@@ -30,25 +30,33 @@ FILE: ../../../flutter/flow/instrumentation.cc
 FILE: ../../../flutter/flow/instrumentation.h
 FILE: ../../../flutter/flow/layers/backdrop_filter_layer.cc
 FILE: ../../../flutter/flow/layers/backdrop_filter_layer.h
+FILE: ../../../flutter/flow/layers/backdrop_filter_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/child_scene_layer.cc
 FILE: ../../../flutter/flow/layers/child_scene_layer.h
 FILE: ../../../flutter/flow/layers/clip_path_layer.cc
 FILE: ../../../flutter/flow/layers/clip_path_layer.h
+FILE: ../../../flutter/flow/layers/clip_path_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/clip_rect_layer.cc
 FILE: ../../../flutter/flow/layers/clip_rect_layer.h
+FILE: ../../../flutter/flow/layers/clip_rect_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/clip_rrect_layer.cc
 FILE: ../../../flutter/flow/layers/clip_rrect_layer.h
+FILE: ../../../flutter/flow/layers/clip_rrect_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/color_filter_layer.cc
 FILE: ../../../flutter/flow/layers/color_filter_layer.h
+FILE: ../../../flutter/flow/layers/color_filter_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/container_layer.cc
 FILE: ../../../flutter/flow/layers/container_layer.h
+FILE: ../../../flutter/flow/layers/container_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/layer.cc
 FILE: ../../../flutter/flow/layers/layer.h
 FILE: ../../../flutter/flow/layers/layer_tree.cc
 FILE: ../../../flutter/flow/layers/layer_tree.h
+FILE: ../../../flutter/flow/layers/layer_tree_unittests.cc
 FILE: ../../../flutter/flow/layers/layer_unittests.cc
 FILE: ../../../flutter/flow/layers/opacity_layer.cc
 FILE: ../../../flutter/flow/layers/opacity_layer.h
+FILE: ../../../flutter/flow/layers/opacity_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/performance_overlay_layer.cc
 FILE: ../../../flutter/flow/layers/performance_overlay_layer.h
 FILE: ../../../flutter/flow/layers/performance_overlay_layer_unittests.cc
@@ -57,14 +65,19 @@ FILE: ../../../flutter/flow/layers/physical_shape_layer.h
 FILE: ../../../flutter/flow/layers/physical_shape_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/picture_layer.cc
 FILE: ../../../flutter/flow/layers/picture_layer.h
+FILE: ../../../flutter/flow/layers/picture_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/platform_view_layer.cc
 FILE: ../../../flutter/flow/layers/platform_view_layer.h
+FILE: ../../../flutter/flow/layers/platform_view_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/shader_mask_layer.cc
 FILE: ../../../flutter/flow/layers/shader_mask_layer.h
+FILE: ../../../flutter/flow/layers/shader_mask_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/texture_layer.cc
 FILE: ../../../flutter/flow/layers/texture_layer.h
+FILE: ../../../flutter/flow/layers/texture_layer_unittests.cc
 FILE: ../../../flutter/flow/layers/transform_layer.cc
 FILE: ../../../flutter/flow/layers/transform_layer.h
+FILE: ../../../flutter/flow/layers/transform_layer_unittests.cc
 FILE: ../../../flutter/flow/matrix_decomposition.cc
 FILE: ../../../flutter/flow/matrix_decomposition.h
 FILE: ../../../flutter/flow/matrix_decomposition_unittests.cc

flow/BUILD.gn

@@ -4,8 +4,8 @@
 
 if (is_fuchsia) {
   import("//build/fuchsia/sdk.gni")
+  import("$flutter_root/tools/fuchsia/fuchsia_archive.gni")
 }
-
 import("$flutter_root/testing/testing.gni")
 
 source_set("flow") {
@@ -102,30 +102,102 @@ test_fixtures("flow_fixtures") {
   fixtures = []
 }
 
+source_set("flow_testing") {
+  testonly = true
+
+  sources = [
+    "testing/layer_test.h",
+    "testing/mock_layer.cc",
+    "testing/mock_layer.h",
+    "testing/mock_texture.cc",
+    "testing/mock_texture.h",
+    "testing/skia_gpu_object_layer_test.cc",
+    "testing/skia_gpu_object_layer_test.h",
+  ]
+
+  public_deps = [
+    ":flow",
+    "$flutter_root/testing:skia",
+    "//third_party/googletest:gtest",
+  ]
+}
+
 executable("flow_unittests") {
   testonly = true
 
   sources = [
     "flow_run_all_unittests.cc",
     "flow_test_utils.cc",
     "flow_test_utils.h",
+    "layers/backdrop_filter_layer_unittests.cc",
+    "layers/clip_path_layer_unittests.cc",
+    "layers/clip_rect_layer_unittests.cc",
+    "layers/clip_rrect_layer_unittests.cc",
+    "layers/color_filter_layer_unittests.cc",
+    "layers/container_layer_unittests.cc",
+    "layers/layer_tree_unittests.cc",
     "layers/layer_unittests.cc",
+    "layers/opacity_layer_unittests.cc",
     "layers/performance_overlay_layer_unittests.cc",
     "layers/physical_shape_layer_unittests.cc",
+    "layers/picture_layer_unittests.cc",
+    "layers/platform_view_layer_unittests.cc",
+    "layers/shader_mask_layer_unittests.cc",
+    "layers/texture_layer_unittests.cc",
+    "layers/transform_layer_unittests.cc",
     "matrix_decomposition_unittests.cc",
     "mutators_stack_unittests.cc",
     "raster_cache_unittests.cc",
     "skia_gpu_object_unittests.cc",
+    "testing/mock_layer_unittests.cc",
+    "testing/mock_texture_unittests.cc",
     "texture_unittests.cc",
   ]
 
   deps = [
     ":flow",
     ":flow_fixtures",
+    ":flow_testing",
     "$flutter_root/fml",
+    "$flutter_root/testing:skia",
     "$flutter_root/testing:testing_lib",
     "//third_party/dart/runtime:libdart_jit",  # for tracing
     "//third_party/googletest:gtest",
     "//third_party/skia",
   ]
 }
+
+if (is_fuchsia) {
+  fuchsia_archive("flow_tests") {
+    testonly = true
+
+    deps = [
+      ":flow_unittests",
+    ]
+
+    binary = "flow_unittests"
+
+    libraries = common_libs
+
+    meta_dir = "$flutter_root/testing/fuchsia/meta"
+    cmx_file = "$meta_dir/fuchsia_test.cmx"
+
+    resources = [
+      {
+        path = rebase_path(
+                "$flutter_root/testing/resources/performance_overlay_gold_60fps.png")
+        dest = "flutter/testing/resources/performance_overlay_gold_60fps.png"
+      },
+      {
+        path = rebase_path(
+                "$flutter_root/testing/resources/performance_overlay_gold_90fps.png")
+        dest = "flutter/testing/resources/performance_overlay_gold_90fps.png"
+      },
+      {
+        path = rebase_path(
+                "$flutter_root/testing/resources/performance_overlay_gold_120fps.png")
+        dest = "flutter/testing/resources/performance_overlay_gold_120fps.png"
+      },
+    ]
+  }
+}

flow/embedded_views.h

@@ -143,6 +143,7 @@ class MutatorsStack {
   // Returns an iterator pointing to the bottom of the stack.
   const std::vector<std::shared_ptr<Mutator>>::const_reverse_iterator Bottom()
       const;
+  bool is_empty() const { return vector_.empty(); }
 
   bool operator==(const MutatorsStack& other) const {
     if (vector_.size() != other.vector_.size()) {
@@ -156,10 +157,26 @@ class MutatorsStack {
     return true;
   }
 
+  bool operator==(const std::vector<Mutator>& other) const {
+    if (vector_.size() != other.size()) {
+      return false;
+    }
+    for (size_t i = 0; i < vector_.size(); i++) {
+      if (*vector_[i] != other[i]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   bool operator!=(const MutatorsStack& other) const {
     return !operator==(other);
   }
 
+  bool operator!=(const std::vector<Mutator>& other) const {
+    return !operator==(other);
+  }
+
  private:
   std::vector<std::shared_ptr<Mutator>> vector_;
 };  // MutatorsStack

flow/flow_run_all_unittests.cc

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include "flutter/fml/build_config.h"
 #include "flutter/fml/command_line.h"
 #include "flutter/fml/logging.h"
 #include "gtest/gtest.h"
@@ -23,8 +24,14 @@
 int main(int argc, char** argv) {
   testing::InitGoogleTest(&argc, argv);
   fml::CommandLine cmd = fml::CommandLineFromArgcArgv(argc, argv);
+
+#if defined(OS_FUCHSIA)
+  flutter::SetGoldenDir(cmd.GetOptionValueWithDefault(
+      "golden-dir", "/pkg/data/flutter/testing/resources"));
+#else
   flutter::SetGoldenDir(
       cmd.GetOptionValueWithDefault("golden-dir", "flutter/testing/resources"));
+#endif
   flutter::SetFontFile(cmd.GetOptionValueWithDefault(
       "font-file",
       "flutter/third_party/txt/third_party/fonts/Roboto-Regular.ttf"));

flow/layers/backdrop_filter_layer.cc

@@ -11,8 +11,6 @@ BackdropFilterLayer::BackdropFilterLayer(sk_sp<SkImageFilter> filter)
   set_layer_reads_surface(filter_.get() != nullptr);
 }
 
-BackdropFilterLayer::~BackdropFilterLayer() = default;
-
 void BackdropFilterLayer::Paint(PaintContext& context) const {
   TRACE_EVENT0("flutter", "BackdropFilterLayer::Paint");
   FML_DCHECK(needs_painting());

flow/layers/backdrop_filter_layer.h

@@ -14,7 +14,6 @@ namespace flutter {
 class BackdropFilterLayer : public ContainerLayer {
  public:
   BackdropFilterLayer(sk_sp<SkImageFilter> filter);
-  ~BackdropFilterLayer() override;
 
   void Paint(PaintContext& context) const override;