TestStorageStream.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include <stdlib.h>

#include "gtest/gtest.h"

#include "Helpers.h"

#include "mozilla/gtest/MozAssertions.h"

#include "nsCOMPtr.h"

#include "nsICloneableInputStream.h"

#include "nsIInputStream.h"

#include "nsIOutputStream.h"

#include "nsIStorageStream.h"

#include "nsTArray.h"

namespace {

void WriteData(nsIOutputStream* aOut, nsTArray<char>& aData, uint32_t aNumBytes,

               nsACString& aDataWritten) {

  uint32_t n;

  nsresult rv = aOut->Write(aData.Elements(), aNumBytes, &n);

  EXPECT_NS_SUCCEEDED(rv);

  aDataWritten.Append(aData.Elements(), aNumBytes);

}  // namespace

TEST(StorageStreams, Main)

  // generate some test data we will write in 4k chunks to the stream

  nsTArray<char> kData;

  testing::CreateData(4096, kData);

  // track how much data was written so we can compare at the end

  nsAutoCString dataWritten;

  nsresult rv;

  nsCOMPtr<nsIStorageStream> stor;

  rv = NS_NewStorageStream(kData.Length(), UINT32_MAX, getter_AddRefs(stor));

  EXPECT_NS_SUCCEEDED(rv);

  nsCOMPtr<nsIOutputStream> out;

  rv = stor->GetOutputStream(0, getter_AddRefs(out));

  EXPECT_NS_SUCCEEDED(rv);

  WriteData(out, kData, kData.Length(), dataWritten);

  WriteData(out, kData, kData.Length(), dataWritten);

  rv = out->Close();

  EXPECT_NS_SUCCEEDED(rv);

  out = nullptr;

  nsCOMPtr<nsIInputStream> in;

  rv = stor->NewInputStream(0, getter_AddRefs(in));

  EXPECT_NS_SUCCEEDED(rv);

  nsCOMPtr<nsICloneableInputStream> cloneable = do_QueryInterface(in);

  ASSERT_TRUE(cloneable != nullptr);

  ASSERT_TRUE(cloneable->GetCloneable());

  nsCOMPtr<nsIInputStream> clone;

  rv = cloneable->Clone(getter_AddRefs(clone));

  testing::ConsumeAndValidateStream(in, dataWritten);

  testing::ConsumeAndValidateStream(clone, dataWritten);

  in = nullptr;

  clone = nullptr;

  // now, write 3 more full 4k segments + 11 bytes, starting at 8192

  // total written equals 20491 bytes

  rv = stor->GetOutputStream(dataWritten.Length(), getter_AddRefs(out));

  EXPECT_NS_SUCCEEDED(rv);

  WriteData(out, kData, kData.Length(), dataWritten);

  WriteData(out, kData, kData.Length(), dataWritten);

  WriteData(out, kData, kData.Length(), dataWritten);

  WriteData(out, kData, 11, dataWritten);

  rv = out->Close();

  EXPECT_NS_SUCCEEDED(rv);

  out = nullptr;

  // now, read all

  rv = stor->NewInputStream(0, getter_AddRefs(in));

  EXPECT_NS_SUCCEEDED(rv);

  testing::ConsumeAndValidateStream(in, dataWritten);

  in = nullptr;

TEST(StorageStreams, EarlyInputStream)

  // generate some test data we will write in 4k chunks to the stream

  nsTArray<char> kData;

  testing::CreateData(4096, kData);

  // track how much data was written so we can compare at the end

  nsAutoCString dataWritten;

  nsresult rv;

  nsCOMPtr<nsIStorageStream> stor;

  rv = NS_NewStorageStream(kData.Length(), UINT32_MAX, getter_AddRefs(stor));

  EXPECT_NS_SUCCEEDED(rv);

  // Get input stream before writing data into the output stream

  nsCOMPtr<nsIInputStream> in;

  rv = stor->NewInputStream(0, getter_AddRefs(in));

  EXPECT_NS_SUCCEEDED(rv);

  // Write data to output stream

  nsCOMPtr<nsIOutputStream> out;

  rv = stor->GetOutputStream(0, getter_AddRefs(out));

  EXPECT_NS_SUCCEEDED(rv);

  WriteData(out, kData, kData.Length(), dataWritten);

  WriteData(out, kData, kData.Length(), dataWritten);

  rv = out->Close();

  EXPECT_NS_SUCCEEDED(rv);

  out = nullptr;

  // Should be able to consume input stream

  testing::ConsumeAndValidateStream(in, dataWritten);

  in = nullptr;