1 files changed, 129 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestStorageStream.cpp b/xpcom/tests/gtest/TestStorageStream.cpp
new file mode 100644
index 0000000000..8cfc16dc1b
--- /dev/null
+++ b/xpcom/tests/gtest/TestStorageStream.cpp
@@ -0,0 +1,129 @@
+/* -*- 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 "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_TRUE(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_TRUE(NS_SUCCEEDED(rv));
+
+  nsCOMPtr<nsIOutputStream> out;
+  rv = stor->GetOutputStream(0, getter_AddRefs(out));
+  EXPECT_TRUE(NS_SUCCEEDED(rv));
+
+  WriteData(out, kData, kData.Length(), dataWritten);
+  WriteData(out, kData, kData.Length(), dataWritten);
+
+  rv = out->Close();
+  EXPECT_TRUE(NS_SUCCEEDED(rv));
+  out = nullptr;
+
+  nsCOMPtr<nsIInputStream> in;
+  rv = stor->NewInputStream(0, getter_AddRefs(in));
+  EXPECT_TRUE(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_TRUE(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_TRUE(NS_SUCCEEDED(rv));
+  out = nullptr;
+
+  // now, read all
+  rv = stor->NewInputStream(0, getter_AddRefs(in));
+  EXPECT_TRUE(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_TRUE(NS_SUCCEEDED(rv));
+
+  // Get input stream before writing data into the output stream
+  nsCOMPtr<nsIInputStream> in;
+  rv = stor->NewInputStream(0, getter_AddRefs(in));
+  EXPECT_TRUE(NS_SUCCEEDED(rv));
+
+  // Write data to output stream
+  nsCOMPtr<nsIOutputStream> out;
+  rv = stor->GetOutputStream(0, getter_AddRefs(out));
+  EXPECT_TRUE(NS_SUCCEEDED(rv));
+
+  WriteData(out, kData, kData.Length(), dataWritten);
+  WriteData(out, kData, kData.Length(), dataWritten);
+
+  rv = out->Close();
+  EXPECT_TRUE(NS_SUCCEEDED(rv));
+  out = nullptr;
+
+  // Should be able to consume input stream
+  testing::ConsumeAndValidateStream(in, dataWritten);
+  in = nullptr;
+}