Pull test utilities from MinidumpMemoryWriter’s test out into their own file

minidump/minidump_memory_writer_test_util.cc

+// 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_memory_writer_test_util.h"
+
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+
+TestMinidumpMemoryWriter::TestMinidumpMemoryWriter(uint64_t base_address,
+                                                   size_t size,
+                                                   uint8_t value)
+    : MinidumpMemoryWriter(),
+      base_address_(base_address),
+      expected_offset_(-1),
+      size_(size),
+      value_(value) {
+}
+
+TestMinidumpMemoryWriter::~TestMinidumpMemoryWriter() {
+}
+
+uint64_t TestMinidumpMemoryWriter::MemoryRangeBaseAddress() const {
+  EXPECT_EQ(state(), kStateFrozen);
+  return base_address_;
+}
+
+size_t TestMinidumpMemoryWriter::MemoryRangeSize() const {
+  EXPECT_GE(state(), kStateFrozen);
+  return size_;
+}
+
+bool TestMinidumpMemoryWriter::WillWriteAtOffsetImpl(off_t offset) {
+  EXPECT_EQ(state(), kStateFrozen);
+  expected_offset_ = offset;
+  bool rv = MinidumpMemoryWriter::WillWriteAtOffsetImpl(offset);
+  EXPECT_TRUE(rv);
+  return rv;
+}
+
+bool TestMinidumpMemoryWriter::WriteObject(FileWriterInterface* file_writer) {
+  EXPECT_EQ(state(), kStateWritable);
+  EXPECT_EQ(expected_offset_, file_writer->Seek(0, SEEK_CUR));
+
+  bool rv = true;
+  if (size_ > 0) {
+    std::string data(size_, value_);
+    rv = file_writer->Write(&data[0], size_);
+    EXPECT_TRUE(rv);
+  }
+
+  return rv;
+}
+
+void ExpectMinidumpMemoryDescriptorAndContents(
+    const MINIDUMP_MEMORY_DESCRIPTOR* expected,
+    const MINIDUMP_MEMORY_DESCRIPTOR* observed,
+    const std::string& file_contents,
+    uint8_t value,
+    bool at_eof) {
+  EXPECT_EQ(expected->StartOfMemoryRange, observed->StartOfMemoryRange);
+  EXPECT_EQ(expected->Memory.DataSize, observed->Memory.DataSize);
+  if (expected->Memory.Rva != 0) {

[Mark Mentovai, 2014/10/07 19:01:56]

This new conditional is the only change to the code. The MinidumpThreadWriter
test doesn’t compute the expected offsets (RVAs) of the memory data.

+    const uint32_t kMemoryAlignment = 16;
+    EXPECT_EQ(
+        (expected->Memory.Rva + kMemoryAlignment - 1) & ~(kMemoryAlignment - 1),
+        observed->Memory.Rva);
+  }
+  if (at_eof) {
+    EXPECT_EQ(file_contents.size(),
+              observed->Memory.Rva + observed->Memory.DataSize);
+  } else {
+    EXPECT_GE(file_contents.size(),
+              observed->Memory.Rva + observed->Memory.DataSize);
+  }
+
+  std::string expected_data(expected->Memory.DataSize, value);
+  std::string observed_data(&file_contents[observed->Memory.Rva],
+                            observed->Memory.DataSize);
+  EXPECT_EQ(expected_data, observed_data);
+}
+
+}  // namespace test
+}  // namespace crashpad