Mojo: Suppress validation error logging in some tests

mojo/edk/js/tests/js_to_cpp_tests.cc

 // 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 <stddef.h>
 #include <stdint.h>
 
 #include <string>
 #include <utility>
 
 #include "base/at_exit.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "gin/array_buffer.h"
 #include "gin/public/isolate_holder.h"
 #include "gin/v8_initializer.h"
 #include "mojo/common/data_pipe_utils.h"
 #include "mojo/edk/js/mojo_runner_delegate.h"
 #include "mojo/edk/js/tests/js_to_cpp.mojom.h"
 #include "mojo/edk/test/test_utils.h"
 #include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/lib/validation_errors.h"
 #include "mojo/public/cpp/system/core.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace edk {
 namespace js {
 
 // Global value updated by some checks to prevent compilers from optimizing
 // reads out of existence.
 uint32_t g_waste_accumulator = 0;
@@ skipping 390 matching lines @@
   EXPECT_TRUE(cpp_side_connection.DidSucceed());
 }
 
 TEST_F(JsToCppTest, Echo) {
   EchoCppSideConnection cpp_side_connection;
   RunTest("mojo/edk/js/tests/js_to_cpp_tests", &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("mojo/edk/js/tests/js_to_cpp_tests", &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("mojo/edk/js/tests/js_to_cpp_tests", &cpp_side_connection);
   EXPECT_TRUE(cpp_side_connection.DidSucceed());
 }
 
 }  // namespace js
 }  // namespace edk
 }  // namespace mojo