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#include "gtest/gtest.h"
#include "nsCOMPtr.h"
#include "nsIInputStream.h"
#include "nsStreamUtils.h"
#include "nsString.h"
#include "nsStringStream.h"
#include "SlicedInputStream.h"
/* We want to ensure that sliced streams work with both seekable and
* non-seekable input streams. As our string streams are seekable, we need to
* provide a string stream that doesn't permit seeking, so we can test the
* logic that emulates seeking in sliced input streams.
*/
class NonSeekableStringStream final : public nsIInputStream
{
nsCOMPtr<nsIInputStream> mStream;
public:
NS_DECL_THREADSAFE_ISUPPORTS
explicit NonSeekableStringStream(const nsACString& aBuffer)
{
NS_NewCStringInputStream(getter_AddRefs(mStream), aBuffer);
}
NS_IMETHOD
Available(uint64_t* aLength) override
{
return mStream->Available(aLength);
}
NS_IMETHOD
Read(char* aBuffer, uint32_t aCount, uint32_t* aReadCount) override
{
return mStream->Read(aBuffer, aCount, aReadCount);
}
NS_IMETHOD
ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
uint32_t aCount, uint32_t *aResult) override
{
return mStream->ReadSegments(aWriter, aClosure, aCount, aResult);
}
NS_IMETHOD
Close() override
{
return mStream->Close();
}
NS_IMETHOD
IsNonBlocking(bool* aNonBlocking) override
{
return mStream->IsNonBlocking(aNonBlocking);
}
private:
~NonSeekableStringStream() {}
};
NS_IMPL_ISUPPORTS(NonSeekableStringStream, nsIInputStream)
// Helper function for creating a seekable nsIInputStream + a SlicedInputStream.
SlicedInputStream*
CreateSeekableStreams(uint32_t aSize, uint64_t aStart, uint64_t aLength,
nsCString& aBuffer)
{
aBuffer.SetLength(aSize);
for (uint32_t i = 0; i < aSize; ++i) {
aBuffer.BeginWriting()[i] = i % 10;
}
nsCOMPtr<nsIInputStream> stream;
NS_NewCStringInputStream(getter_AddRefs(stream), aBuffer);
return new SlicedInputStream(stream, aStart, aLength);
}
// Helper function for creating a non-seekable nsIInputStream + a
// SlicedInputStream.
SlicedInputStream*
CreateNonSeekableStreams(uint32_t aSize, uint64_t aStart, uint64_t aLength,
nsCString& aBuffer)
{
aBuffer.SetLength(aSize);
for (uint32_t i = 0; i < aSize; ++i) {
aBuffer.BeginWriting()[i] = i % 10;
}
RefPtr<NonSeekableStringStream> stream = new NonSeekableStringStream(aBuffer);
return new SlicedInputStream(stream, aStart, aLength);
}
// Same start, same length.
TEST(TestSlicedInputStream, Simple) {
const size_t kBufSize = 4096;
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateSeekableStreams(kBufSize, 0, kBufSize, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)kBufSize, length);
char buf2[kBufSize];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ(count, buf.Length());
ASSERT_TRUE(nsCString(buf.get()).Equals(nsCString(buf2)));
}
// Simple sliced stream - seekable
TEST(TestSlicedInputStream, Sliced) {
const size_t kBufSize = 4096;
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateSeekableStreams(kBufSize, 10, 100, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)100, length);
char buf2[kBufSize / 2];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)100, count);
ASSERT_TRUE(nsCString(buf.get() + 10, count).Equals(nsCString(buf2, count)));
}
// Simple sliced stream - non seekable
TEST(TestSlicedInputStream, SlicedNoSeek) {
const size_t kBufSize = 4096;
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(kBufSize, 10, 100, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)100, length);
char buf2[kBufSize / 2];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)100, count);
ASSERT_TRUE(nsCString(buf.get() + 10, count).Equals(nsCString(buf2, count)));
}
// Big inputStream - seekable
TEST(TestSlicedInputStream, BigSliced) {
const size_t kBufSize = 4096 * 40;
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateSeekableStreams(kBufSize, 4096 * 5, 4096 * 10, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)4096 * 10, length);
char buf2[kBufSize / 2];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)4096 * 10, count);
ASSERT_TRUE(nsCString(buf.get() + 4096 * 5, count).Equals(nsCString(buf2, count)));
}
// Big inputStream - non seekable
TEST(TestSlicedInputStream, BigSlicedNoSeek) {
const size_t kBufSize = 4096 * 40;
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(kBufSize, 4096 * 5, 4096 * 10, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)4096 * 10, length);
char buf2[kBufSize / 2];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)4096 * 10, count);
ASSERT_TRUE(nsCString(buf.get() + 4096 * 5, count).Equals(nsCString(buf2, count)));
}
// Available size.
TEST(TestSlicedInputStream, Available) {
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(500000, 4, 400000, buf);
uint64_t toRead = 400000;
for (uint32_t i = 0; i < 400; ++i) {
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ(toRead, length);
char buf2[1000];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)1000, count);
ASSERT_TRUE(nsCString(buf.get() + 4 + (1000 * i), count).Equals(nsCString(buf2, count)));
toRead -= count;
}
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)0, length);
char buf2[4096];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)0, count);
}
// What if start is > then the size of the buffer?
TEST(TestSlicedInputStream, StartBiggerThan) {
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(500, 4000, 1, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)0, length);
char buf2[4096];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)0, count);
}
// What if the length is > than the size of the buffer?
TEST(TestSlicedInputStream, LengthBiggerThan) {
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(500, 0, 500000, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)500, length);
char buf2[4096];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)500, count);
}
// What if the length is 0?
TEST(TestSlicedInputStream, Length0) {
nsCString buf;
RefPtr<SlicedInputStream> sis =
CreateNonSeekableStreams(500, 0, 0, buf);
uint64_t length;
ASSERT_EQ(NS_OK, sis->Available(&length));
ASSERT_EQ((uint64_t)0, length);
char buf2[4096];
uint32_t count;
ASSERT_EQ(NS_OK, sis->Read(buf2, sizeof(buf2), &count));
ASSERT_EQ((uint64_t)0, count);
}
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