Add MinidumpMemoryWriter, MinidumpMemoryListWriter, and their test

minidump/minidump_test_util.cc

Index: minidump/minidump_test_util.cc
diff --git a/minidump/minidump_test_util.cc b/minidump/minidump_test_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f9211347316c93072b67ef02b69f0d783f357f51
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+++ b/minidump/minidump_test_util.cc
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+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "minidump/minidump_test_util.h"
+
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+
+void VerifyMinidumpHeader(const MINIDUMP_HEADER* header,
+                          uint32_t streams,
+                          uint32_t timestamp) {
+  EXPECT_EQ(static_cast<uint32_t>(MINIDUMP_SIGNATURE), header->Signature);
+  EXPECT_EQ(static_cast<uint32_t>(MINIDUMP_VERSION), header->Version);
+  ASSERT_EQ(streams, header->NumberOfStreams);
+  ASSERT_EQ(streams ? sizeof(MINIDUMP_HEADER) : 0u, header->StreamDirectoryRva);
+  EXPECT_EQ(0u, header->CheckSum);
+  EXPECT_EQ(timestamp, header->TimeDateStamp);
+  EXPECT_EQ(MiniDumpNormal, header->Flags);
+}
+
+}  // namespace test
+}  // namespace crashpad