Add unit tests for Dart entrypoint arguments on Linux

shell/platform/linux/fl_dart_project_test.cc

@@ -38,6 +38,31 @@ TEST(FlDartProjectTest, EnableMirrors) {
   G_GNUC_END_IGNORE_DEPRECATIONS
 }
 
+TEST(FlDartProjectTest, DartEntrypointArgs) {
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+
+  char** retrieved_args =
+      fl_dart_project_get_dart_entrypoint_arguments(project);
+
+  EXPECT_EQ(g_strv_length(retrieved_args), 0U);
+
+  GPtrArray* args_array = g_ptr_array_new();
+  g_ptr_array_add(args_array, (gpointer) "arg_one");
+  g_ptr_array_add(args_array, (gpointer) "arg_two");
+  g_ptr_array_add(args_array, (gpointer) "arg_three");
+  g_ptr_array_add(args_array, nullptr);
+  gchar** args = (gchar**)g_ptr_array_free(args_array, false);
+
+  fl_dart_project_set_dart_entrypoint_arguments(project, args);
+
+  retrieved_args = fl_dart_project_get_dart_entrypoint_arguments(project);
+
+  // FlDartProject should have done a deep copy of the args
+  EXPECT_NE(retrieved_args, args);
+
+  EXPECT_EQ(g_strv_length(retrieved_args), 3U);
+}
+
 TEST(FlDartProjectTest, SwitchesEmpty) {
   g_autoptr(FlDartProject) project = fl_dart_project_new();
 

shell/platform/linux/fl_engine_test.cc

@@ -224,3 +224,38 @@ TEST(FlEngineTest, SettingsPlugin) {
 
   EXPECT_TRUE(called);
 }
+
+TEST(FlEngineTest, DartEntrypointArgs) {
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+
+  GPtrArray* args_array = g_ptr_array_new();
+  g_ptr_array_add(args_array, (gpointer) "arg_one");
+  g_ptr_array_add(args_array, (gpointer) "arg_two");
+  g_ptr_array_add(args_array, (gpointer) "arg_three");
+  g_ptr_array_add(args_array, nullptr);
+  gchar** args = (gchar**)g_ptr_array_free(args_array, false);
+
+  fl_dart_project_set_dart_entrypoint_arguments(project, args);
+
+  g_autoptr(FlEngine) engine = make_mock_engine_with_project(project);
+  FlutterEngineProcTable* embedder_api = fl_engine_get_embedder_api(engine);
+
+  bool called = false;
+  embedder_api->Initialize = MOCK_ENGINE_PROC(
+      Initialize, ([&called, &set_args = args](
+                       size_t version, const FlutterRendererConfig* config,
+                       const FlutterProjectArgs* args, void* user_data,
+                       FLUTTER_API_SYMBOL(FlutterEngine) * engine_out) {
+        called = true;
+        EXPECT_NE(set_args, args->dart_entrypoint_argv);
+        EXPECT_EQ(args->dart_entrypoint_argc, 3);
+
+        return kSuccess;
+      }));
+
+  g_autoptr(GError) error = nullptr;
+  EXPECT_TRUE(fl_engine_start(engine, &error));
+  EXPECT_EQ(error, nullptr);
+
+  EXPECT_TRUE(called);
+}

shell/platform/linux/testing/fl_test.cc

@@ -50,6 +50,10 @@ gchar* bytes_to_hex_string(GBytes* bytes) {
 
 FlEngine* make_mock_engine() {
   g_autoptr(FlDartProject) project = fl_dart_project_new();
+  return make_mock_engine_with_project(project);
+}
+
+FlEngine* make_mock_engine_with_project(FlDartProject* project) {
   g_autoptr(FlMockRenderer) renderer = fl_mock_renderer_new();
   g_autoptr(FlEngine) engine = fl_engine_new(project, FL_RENDERER(renderer));
   g_autoptr(GError) engine_error = nullptr;

shell/platform/linux/testing/fl_test.h

@@ -23,6 +23,10 @@ gchar* bytes_to_hex_string(GBytes* bytes);
 // Creates a mock engine that responds to platform messages.
 FlEngine* make_mock_engine();
 
+// Creates a mock engine using a specified FlDartProject that responds to
+// platform messages.
+FlEngine* make_mock_engine_with_project(FlDartProject* project);
+
 G_END_DECLS
 
 #endif  // FLUTTER_SHELL_PLATFORM_LINUX_FL_TEST_H_