Reland of Moves mojo_js_integration_tests into blink.

third_party/WebKit/Source/core/mojo/tests/JsToCppTest.cpp

Index: third_party/WebKit/Source/core/mojo/tests/JsToCppTest.cpp
diff --git a/third_party/WebKit/Source/core/mojo/tests/JsToCppTest.cpp b/third_party/WebKit/Source/core/mojo/tests/JsToCppTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2b7ada7a0a41bfc44538f108598d5076b11db82e
--- /dev/null
+++ b/third_party/WebKit/Source/core/mojo/tests/JsToCppTest.cpp
@@ -0,0 +1,435 @@
+// Copyright 2014 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 "bindings/core/v8/ScriptController.h"
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/V8BindingForCore.h"
+#include "bindings/core/v8/V8BindingForTesting.h"
+#include "bindings/core/v8/V8ScriptRunner.h"
+#include "core/frame/Settings.h"
+#include "core/mojo/MojoHandle.h"
+#include "core/page/Page.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/system/wait.h"
+#include "platform/testing/UnitTestHelpers.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/Source/core/mojo/tests/JsToCpp.mojom-blink.h"
+
+namespace blink {
+namespace {
+
+// Global value updated by some checks to prevent compilers from optimizing
+// reads out of existence.
+uint32_t g_waste_accumulator = 0;
+
+// Negative numbers with different values in each byte, the last of
+// which can survive promotion to double and back.
+const int8_t kExpectedInt8Value = -65;
+const int16_t kExpectedInt16Value = -16961;
+const int32_t kExpectedInt32Value = -1145258561;
+const int64_t kExpectedInt64Value = -77263311946305LL;
+
+// Positive numbers with different values in each byte, the last of
+// which can survive promotion to double and back.
+const uint8_t kExpectedUInt8Value = 65;
+const uint16_t kExpectedUInt16Value = 16961;
+const uint32_t kExpectedUInt32Value = 1145258561;
+const uint64_t kExpectedUInt64Value = 77263311946305LL;
+
+// Double/float values, including special case constants.
+const double kExpectedDoubleVal = 3.14159265358979323846;
+const double kExpectedDoubleInf = std::numeric_limits<double>::infinity();
+const double kExpectedDoubleNan = std::numeric_limits<double>::quiet_NaN();
+const float kExpectedFloatVal = static_cast<float>(kExpectedDoubleVal);
+const float kExpectedFloatInf = std::numeric_limits<float>::infinity();
+const float kExpectedFloatNan = std::numeric_limits<float>::quiet_NaN();
+
+// NaN has the property that it is not equal to itself.
+#define EXPECT_NAN(x) EXPECT_NE(x, x)
+
+String MojoBindingsScriptPath() {
+  String filepath = testing::ExecutableDir();
+  filepath.append("/gen/mojo/public/js/mojo_bindings.js");
+  return filepath;
+}
+
+String TestBindingsScriptPath() {
+  String filepath = testing::ExecutableDir();
+  filepath.append(
+      "/gen/third_party/WebKit/Source/core/mojo/tests/JsToCpp.mojom.js");
+  return filepath;
+}
+
+String TestScriptPath() {
+  String filepath = testing::BlinkRootDir();
+  filepath.append("/Source/core/mojo/tests/JsToCppTest.js");
+  return filepath;
+}
+
+v8::Local<v8::Value> ExecuteScript(const String& script_path,
+                                   LocalFrame& frame) {
+  RefPtr<SharedBuffer> script_src = testing::ReadFromFile(script_path);
+  return frame.GetScriptController().ExecuteScriptInMainWorldAndReturnValue(
+      ScriptSourceCode(String(script_src->Data(), script_src->size())));
+}
+
+void CheckDataPipe(mojo::DataPipeConsumerHandle data_pipe_handle) {
+  const void* buffer = nullptr;
+  unsigned num_bytes = 0;
+  MojoResult result = Wait(data_pipe_handle, MOJO_HANDLE_SIGNAL_READABLE);
+  EXPECT_EQ(MOJO_RESULT_OK, result);
+  result = BeginReadDataRaw(data_pipe_handle, &buffer, &num_bytes,
+                            MOJO_READ_DATA_FLAG_NONE);
+  EXPECT_EQ(MOJO_RESULT_OK, result);
+  EXPECT_EQ(64u, num_bytes);
+  for (unsigned i = 0; i < num_bytes; ++i) {
+    EXPECT_EQ(i, static_cast<unsigned>(static_cast<const char*>(buffer)[i]));
+  }
+  EndReadDataRaw(data_pipe_handle, num_bytes);
+}
+
+void CheckMessagePipe(mojo::MessagePipeHandle message_pipe_handle) {
+  unsigned char buffer[100];
+  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
+  MojoResult result = Wait(message_pipe_handle, MOJO_HANDLE_SIGNAL_READABLE);
+  EXPECT_EQ(MOJO_RESULT_OK, result);
+  result = ReadMessageRaw(message_pipe_handle, buffer, &buffer_size, 0, 0, 0);
+  EXPECT_EQ(MOJO_RESULT_OK, result);
+  EXPECT_EQ(64u, buffer_size);
+  for (int i = 0; i < 64; ++i) {
+    EXPECT_EQ(255 - i, buffer[i]);
+  }
+}
+
+js_to_cpp::blink::EchoArgsPtr BuildSampleEchoArgs() {
+  auto args = js_to_cpp::blink::EchoArgs::New();
+  args->si64 = kExpectedInt64Value;
+  args->si32 = kExpectedInt32Value;
+  args->si16 = kExpectedInt16Value;
+  args->si8 = kExpectedInt8Value;
+  args->ui64 = kExpectedUInt64Value;
+  args->ui32 = kExpectedUInt32Value;
+  args->ui16 = kExpectedUInt16Value;
+  args->ui8 = kExpectedUInt8Value;
+  args->float_val = kExpectedFloatVal;
+  args->float_inf = kExpectedFloatInf;
+  args->float_nan = kExpectedFloatNan;
+  args->double_val = kExpectedDoubleVal;
+  args->double_inf = kExpectedDoubleInf;
+  args->double_nan = kExpectedDoubleNan;
+  args->name = "coming";
+  args->string_array.emplace(3);
+  (*args->string_array)[0] = "one";
+  (*args->string_array)[1] = "two";
+  (*args->string_array)[2] = "three";
+  return args;
+}
+
+void CheckSampleEchoArgs(const js_to_cpp::blink::EchoArgsPtr& arg) {
+  EXPECT_EQ(kExpectedInt64Value, arg->si64);
+  EXPECT_EQ(kExpectedInt32Value, arg->si32);
+  EXPECT_EQ(kExpectedInt16Value, arg->si16);
+  EXPECT_EQ(kExpectedInt8Value, arg->si8);
+  EXPECT_EQ(kExpectedUInt64Value, arg->ui64);
+  EXPECT_EQ(kExpectedUInt32Value, arg->ui32);
+  EXPECT_EQ(kExpectedUInt16Value, arg->ui16);
+  EXPECT_EQ(kExpectedUInt8Value, arg->ui8);
+  EXPECT_EQ(kExpectedFloatVal, arg->float_val);
+  EXPECT_EQ(kExpectedFloatInf, arg->float_inf);
+  EXPECT_NAN(arg->float_nan);
+  EXPECT_EQ(kExpectedDoubleVal, arg->double_val);
+  EXPECT_EQ(kExpectedDoubleInf, arg->double_inf);
+  EXPECT_NAN(arg->double_nan);
+  EXPECT_EQ(String("coming"), arg->name);
+  EXPECT_EQ(String("one"), (*arg->string_array)[0]);
+  EXPECT_EQ(String("two"), (*arg->string_array)[1]);
+  EXPECT_EQ(String("three"), (*arg->string_array)[2]);
+  CheckDataPipe(arg->data_handle.get());
+  CheckMessagePipe(arg->message_handle.get());
+}
+
+void CheckSampleEchoArgsList(const js_to_cpp::blink::EchoArgsListPtr& list) {
+  if (list.is_null())
+    return;
+  CheckSampleEchoArgs(list->item);
+  CheckSampleEchoArgsList(list->next);
+}
+
+// More forgiving checks are needed in the face of potentially corrupt
+// messages. The values don't matter so long as all accesses are within
+// bounds.
+void CheckCorruptedString(const String& arg) {
+  for (size_t i = 0; i < arg.length(); ++i)
+    g_waste_accumulator += arg[i];
+}
+
+void CheckCorruptedStringArray(const Optional<Vector<String>>& string_array) {
+  if (!string_array)
+    return;
+  for (size_t i = 0; i < string_array->size(); ++i)
+    CheckCorruptedString((*string_array)[i]);
+}
+
+void CheckCorruptedDataPipe(mojo::DataPipeConsumerHandle data_pipe_handle) {
+  unsigned char buffer[100];
+  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
+  MojoResult result = ReadDataRaw(data_pipe_handle, buffer, &buffer_size,
+                                  MOJO_READ_DATA_FLAG_NONE);
+  if (result != MOJO_RESULT_OK)
+    return;
+  for (uint32_t i = 0; i < buffer_size; ++i)
+    g_waste_accumulator += buffer[i];
+}
+
+void CheckCorruptedMessagePipe(mojo::MessagePipeHandle message_pipe_handle) {
+  unsigned char buffer[100];
+  uint32_t buffer_size = static_cast<uint32_t>(sizeof(buffer));
+  MojoResult result =
+      ReadMessageRaw(message_pipe_handle, buffer, &buffer_size, 0, 0, 0);
+  if (result != MOJO_RESULT_OK)
+    return;
+  for (uint32_t i = 0; i < buffer_size; ++i)
+    g_waste_accumulator += buffer[i];
+}
+
+void CheckCorruptedEchoArgs(const js_to_cpp::blink::EchoArgsPtr& arg) {
+  if (arg.is_null())
+    return;
+  CheckCorruptedString(arg->name);
+  CheckCorruptedStringArray(arg->string_array);
+  if (arg->data_handle.is_valid())
+    CheckCorruptedDataPipe(arg->data_handle.get());
+  if (arg->message_handle.is_valid())
+    CheckCorruptedMessagePipe(arg->message_handle.get());
+}
+
+void CheckCorruptedEchoArgsList(const js_to_cpp::blink::EchoArgsListPtr& list) {
+  if (list.is_null())
+    return;
+  CheckCorruptedEchoArgs(list->item);
+  CheckCorruptedEchoArgsList(list->next);
+}
+
+// Base Provider implementation class. It's expected that tests subclass and
+// override the appropriate Provider functions. When test is done quit the
+// run_loop().
+class CppSideConnection : public js_to_cpp::blink::CppSide {
+ public:
+  CppSideConnection() : mishandled_messages_(0), binding_(this) {}
+  ~CppSideConnection() override {}
+
+  void set_js_side(js_to_cpp::blink::JsSidePtr js_side) {
+    js_side_ = std::move(js_side);
+  }
+  js_to_cpp::blink::JsSide* js_side() { return js_side_.get(); }
+
+  void Bind(mojo::InterfaceRequest<js_to_cpp::blink::CppSide> request) {
+    binding_.Bind(std::move(request));
+    // Keep the pipe open even after validation errors.
+    binding_.EnableTestingMode();
+  }
+
+  // js_to_cpp::CppSide:
+  void StartTest() override { NOTREACHED(); }
+
+  void TestFinished() override { NOTREACHED(); }
+
+  void PingResponse() override { mishandled_messages_ += 1; }
+
+  void EchoResponse(js_to_cpp::blink::EchoArgsListPtr list) override {
+    mishandled_messages_ += 1;
+  }
+
+  void BitFlipResponse(
+      js_to_cpp::blink::EchoArgsListPtr list,
+      js_to_cpp::blink::ForTestingAssociatedPtrInfo not_used) override {
+    mishandled_messages_ += 1;
+  }
+
+  void BackPointerResponse(js_to_cpp::blink::EchoArgsListPtr list) override {
+    mishandled_messages_ += 1;
+  }
+
+ protected:
+  js_to_cpp::blink::JsSidePtr js_side_;
+  int mishandled_messages_;
+  mojo::Binding<js_to_cpp::blink::CppSide> binding_;
+};
+
+// Trivial test to verify a message sent from JS is received.
+class PingCppSideConnection : public CppSideConnection {
+ public:
+  PingCppSideConnection() : got_message_(false) {}
+  ~PingCppSideConnection() override {}
+
+  // js_to_cpp::CppSide:
+  void StartTest() override { js_side_->Ping(); }
+
+  void PingResponse() override {
+    got_message_ = true;
+    testing::ExitRunLoop();
+  }
+
+  bool DidSucceed() { return got_message_ && !mishandled_messages_; }
+
+ private:
+  bool got_message_;
+};
+
+// Test that parameters are passed with correct values.
+class EchoCppSideConnection : public CppSideConnection {
+ public:
+  EchoCppSideConnection() : message_count_(0), termination_seen_(false) {}
+  ~EchoCppSideConnection() override {}
+
+  // js_to_cpp::CppSide:
+  void StartTest() override {
+    js_side_->Echo(kExpectedMessageCount, BuildSampleEchoArgs());
+  }
+
+  void EchoResponse(js_to_cpp::blink::EchoArgsListPtr list) override {
+    message_count_ += 1;
+
+    const js_to_cpp::blink::EchoArgsPtr& special_arg = list->item;
+    EXPECT_EQ(-1, special_arg->si64);
+    EXPECT_EQ(-1, special_arg->si32);
+    EXPECT_EQ(-1, special_arg->si16);
+    EXPECT_EQ(-1, special_arg->si8);
+    EXPECT_EQ(String("going"), special_arg->name);
+    CheckDataPipe(special_arg->data_handle.get());
+    CheckMessagePipe(special_arg->message_handle.get());
+
+    CheckSampleEchoArgsList(list->next);
+  }
+
+  void TestFinished() override {
+    termination_seen_ = true;
+    testing::ExitRunLoop();
+  }
+
+  bool DidSucceed() {
+    return termination_seen_ && !mishandled_messages_ &&
+           message_count_ == kExpectedMessageCount;
+  }
+
+ private:
+  static const int kExpectedMessageCount = 10;
+  int message_count_;
+  bool termination_seen_;
+};
+
+// Test that corrupted messages don't wreak havoc.
+class BitFlipCppSideConnection : public CppSideConnection {
+ public:
+  BitFlipCppSideConnection() : termination_seen_(false) {}
+  ~BitFlipCppSideConnection() override {}
+
+  // js_to_cpp::CppSide:
+  void StartTest() override { js_side_->BitFlip(BuildSampleEchoArgs()); }
+
+  void BitFlipResponse(
+      js_to_cpp::blink::EchoArgsListPtr list,
+      js_to_cpp::blink::ForTestingAssociatedPtrInfo not_used) override {
+    CheckCorruptedEchoArgsList(list);
+  }
+
+  void TestFinished() override {
+    termination_seen_ = true;
+    testing::ExitRunLoop();
+  }
+
+  bool DidSucceed() { return termination_seen_; }
+
+ private:
+  bool termination_seen_;
+};
+
+// Test that severely random messages don't wreak havoc.
+class BackPointerCppSideConnection : public CppSideConnection {
+ public:
+  BackPointerCppSideConnection() : termination_seen_(false) {}
+  ~BackPointerCppSideConnection() override {}
+
+  // js_to_cpp::CppSide:
+  void StartTest() override { js_side_->BackPointer(BuildSampleEchoArgs()); }
+
+  void BackPointerResponse(js_to_cpp::blink::EchoArgsListPtr list) override {
+    CheckCorruptedEchoArgsList(list);
+  }
+
+  void TestFinished() override {
+    termination_seen_ = true;
+    testing::ExitRunLoop();
+  }
+
+  bool DidSucceed() { return termination_seen_; }
+
+ private:
+  bool termination_seen_;
+};
+
+class JsToCppTest : public ::testing::Test {
+ public:
+  void RunTest(CppSideConnection* cpp_side) {
+    js_to_cpp::blink::CppSidePtr cpp_side_ptr;
+    cpp_side->Bind(MakeRequest(&cpp_side_ptr));
+
+    js_to_cpp::blink::JsSidePtr js_side_ptr;
+    auto js_side_request = MakeRequest(&js_side_ptr);
+    js_side_ptr->SetCppSide(std::move(cpp_side_ptr));
+    cpp_side->set_js_side(std::move(js_side_ptr));
+
+    V8TestingScope scope;
+    scope.GetPage().GetSettings().SetScriptEnabled(true);
+    ExecuteScript(MojoBindingsScriptPath(), scope.GetFrame());
+    ExecuteScript(TestBindingsScriptPath(), scope.GetFrame());
+
+    v8::Local<v8::Value> start_fn =
+        ExecuteScript(TestScriptPath(), scope.GetFrame());
+    ASSERT_FALSE(start_fn.IsEmpty());
+    ASSERT_TRUE(start_fn->IsFunction());
+    v8::Local<v8::Object> global_proxy = scope.GetContext()->Global();
+    v8::Local<v8::Value> args[1] = {
+        ToV8(MojoHandle::Create(
+                 mojo::ScopedHandle::From(js_side_request.PassMessagePipe())),
+             global_proxy, scope.GetIsolate())};
+    V8ScriptRunner::CallFunction(
+        start_fn.As<v8::Function>(), scope.GetExecutionContext(), global_proxy,
+        WTF_ARRAY_LENGTH(args), args, scope.GetIsolate());
+    testing::EnterRunLoop();
+  }
+};
+
+TEST_F(JsToCppTest, Ping) {
+  PingCppSideConnection cpp_side_connection;
+  RunTest(&cpp_side_connection);
+  EXPECT_TRUE(cpp_side_connection.DidSucceed());
+}
+
+TEST_F(JsToCppTest, Echo) {
+  EchoCppSideConnection cpp_side_connection;
+  RunTest(&cpp_side_connection);
+  EXPECT_TRUE(cpp_side_connection.DidSucceed());
+}
+
+TEST_F(JsToCppTest, BitFlip) {
+  // These tests generate a lot of expected validation errors. Suppress logging.
+  mojo::internal::ScopedSuppressValidationErrorLoggingForTests log_suppression;
+
+  BitFlipCppSideConnection cpp_side_connection;
+  RunTest(&cpp_side_connection);
+  EXPECT_TRUE(cpp_side_connection.DidSucceed());
+}
+
+TEST_F(JsToCppTest, BackPointer) {
+  // These tests generate a lot of expected validation errors. Suppress logging.
+  mojo::internal::ScopedSuppressValidationErrorLoggingForTests log_suppression;
+
+  BackPointerCppSideConnection cpp_side_connection;
+  RunTest(&cpp_side_connection);
+  EXPECT_TRUE(cpp_side_connection.DidSucceed());
+}
+
+}  // namespace
+}  // namespace blink