[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/event_emitter_unittest.cc

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "extensions/renderer/event_emitter.h"
-
-#include "base/bind.h"
-#include "base/memory/ptr_util.h"
-#include "base/values.h"
-#include "extensions/renderer/api_binding_test.h"
-#include "extensions/renderer/api_binding_test_util.h"
-#include "extensions/renderer/api_event_listeners.h"
-#include "gin/handle.h"
-
-namespace extensions {
-namespace {
-
-void DoNothingOnListenerChange(binding::EventListenersChanged changed,
-                               const base::DictionaryValue* filter,
-                               bool was_manual,
-                               v8::Local<v8::Context> context) {}
-
-}  // namespace
-
-using EventEmitterUnittest = APIBindingTest;
-
-TEST_F(EventEmitterUnittest, TestDispatchMethod) {
-  v8::HandleScope handle_scope(isolate());
-  v8::Local<v8::Context> context = MainContext();
-
-  auto listeners = base::MakeUnique<UnfilteredEventListeners>(
-      base::Bind(&DoNothingOnListenerChange), binding::kNoListenerMax);
-
-  // The test util methods enforce that functions always throw or always don't
-  // throw, but we test listeners that do both. Provide implementations for
-  // running functions that don't enforce throw behavior.
-  auto run_js_sync = [](v8::Local<v8::Function> function,
-                        v8::Local<v8::Context> context, int argc,
-                        v8::Local<v8::Value> argv[]) {
-    v8::Global<v8::Value> global_result;
-    v8::Local<v8::Value> result;
-    if (function->Call(context, context->Global(), argc, argv).ToLocal(&result))
-      global_result.Reset(context->GetIsolate(), result);
-    return global_result;
-  };
-
-  auto run_js = [](v8::Local<v8::Function> function,
-                   v8::Local<v8::Context> context, int argc,
-                   v8::Local<v8::Value> argv[]) {
-    ignore_result(function->Call(context, context->Global(), argc, argv));
-  };
-
-  gin::Handle<EventEmitter> event = gin::CreateHandle(
-      isolate(), new EventEmitter(false, std::move(listeners),
-                                  base::Bind(run_js), base::Bind(run_js_sync)));
-
-  v8::Local<v8::Value> v8_event = event.ToV8();
-
-  const char kAddListener[] =
-      "(function(event, listener) { event.addListener(listener); })";
-  v8::Local<v8::Function> add_listener_function =
-      FunctionFromString(context, kAddListener);
-
-  auto add_listener = [context, v8_event,
-                       add_listener_function](base::StringPiece listener) {
-    v8::Local<v8::Function> listener_function =
-        FunctionFromString(context, listener);
-    v8::Local<v8::Value> args[] = {v8_event, listener_function};
-    RunFunction(add_listener_function, context, arraysize(args), args);
-  };
-
-  const char kListener1[] =
-      "(function() {\n"
-      "  this.eventArgs1 = Array.from(arguments);\n"
-      "  return 'listener1';\n"
-      "})";
-  add_listener(kListener1);
-  const char kListener2[] =
-      "(function() {\n"
-      "  this.eventArgs2 = Array.from(arguments);\n"
-      "  return {listener: 'listener2'};\n"
-      "})";
-  add_listener(kListener2);
-  // Listener3 throws, but shouldn't stop the event from reaching other
-  // listeners.
-  const char kListener3[] =
-      "(function() {\n"
-      "  this.eventArgs3 = Array.from(arguments);\n"
-      "  throw new Error('hahaha');\n"
-      "})";
-  add_listener(kListener3);
-  // Returning undefined should not be added to the array of results from
-  // dispatch.
-  const char kListener4[] =
-      "(function() {\n"
-      "  this.eventArgs4 = Array.from(arguments);\n"
-      "})";
-  add_listener(kListener4);
-
-  const char kDispatch[] =
-      "(function(event) {\n"
-      "  return event.dispatch('arg1', 2);\n"
-      "})";
-  v8::Local<v8::Value> dispatch_args[] = {v8_event};
-  v8::Local<v8::Value> dispatch_result =
-      RunFunctionOnGlobal(FunctionFromString(context, kDispatch), context,
-                          arraysize(dispatch_args), dispatch_args);
-
-  const char kExpectedEventArgs[] = "[\"arg1\",2]";
-  for (const char* property :
-       {"eventArgs1", "eventArgs2", "eventArgs3", "eventArgs4"}) {
-    EXPECT_EQ(kExpectedEventArgs, GetStringPropertyFromObject(
-                                      context->Global(), context, property));
-  }
-  EXPECT_EQ("{\"results\":[\"listener1\",{\"listener\":\"listener2\"}]}",
-            V8ToString(dispatch_result, context));
-}
-
-}  // namespace extensions