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Minimal test - lines (67, 75)

Code

static nsresult ReadSegmentsFunction(nsIInputStream* aInStr, void* aClosure,
                                     const char* aBuffer, uint32_t aOffset,
                                     uint32_t aCount, uint32_t* aCountWritten) {
  ReadSegmentsData* data = static_cast(aClosure);
  if (aInStr != data->mStream) return NS_ERROR_FAILURE;
  memcpy(&data->mBuffer[aOffset], aBuffer, aCount);
  *aCountWritten = aCount;
  return NS_OK;
}

Minimal test - lines (77, 101)

Code

TEST(TestNonBlockingAsyncInputStream, ReadSegments)
{
  nsCString data;
  data.Assign("Hello world!");

  nsCOMPtr async;
  {
    // Let's create a test string inputStream
    nsCOMPtr stream;
    ASSERT_EQ(NS_OK, NS_NewCStringInputStream(getter_AddRefs(stream), data));

    // Here the non-blocking stream.
    ASSERT_EQ(NS_OK, NonBlockingAsyncInputStream::Create(
                         stream.forget(), getter_AddRefs(async)));
  }

  // Read works fine.
  char buffer[1024];
  uint32_t read = 0;
  ReadSegmentsData closure(async, buffer);
  ASSERT_EQ(NS_OK, async->ReadSegments(ReadSegmentsFunction, &closure,
                                       sizeof(buffer), &read));
  ASSERT_EQ(data.Length(), read);
  ASSERT_TRUE(data.Equals(nsCString(buffer, read)));
}

Minimal test - lines (58, 65)

Code

class ReadSegmentsData {
 public:
  ReadSegmentsData(nsIInputStream* aStream, char* aBuffer)
      : mStream(aStream), mBuffer(aBuffer) {}

  nsIInputStream* mStream;
  char* mBuffer;
};

Minimal test - lines (103, 146)

Code

TEST(TestNonBlockingAsyncInputStream, AsyncWait_Simple)
{
  nsCString data;
  data.Assign("Hello world!");

  nsCOMPtr async;
  {
    // Let's create a test string inputStream
    nsCOMPtr stream;
    ASSERT_EQ(NS_OK, NS_NewCStringInputStream(getter_AddRefs(stream), data));

    // Here the non-blocking stream.
    ASSERT_EQ(NS_OK, NonBlockingAsyncInputStream::Create(
                         stream.forget(), getter_AddRefs(async)));
  }
  ASSERT_TRUE(!!async);

  // Testing ::Available()
  uint64_t length;
  ASSERT_EQ(NS_OK, async->Available(&length));
  ASSERT_EQ(data.Length(), length);

  // Testing ::AsyncWait - without EventTarget
  RefPtr cb = new testing::InputStreamCallback();

  ASSERT_EQ(NS_OK, async->AsyncWait(cb, 0, 0, nullptr));
  ASSERT_TRUE(cb->Called());

  // Testing ::AsyncWait - with EventTarget
  cb = new testing::InputStreamCallback();
  nsCOMPtr thread = do_GetCurrentThread();

  ASSERT_EQ(NS_OK, async->AsyncWait(cb, 0, 0, thread));
  ASSERT_FALSE(cb->Called());
  MOZ_ALWAYS_TRUE(SpinEventLoopUntil([&]() { return cb->Called(); }));
  ASSERT_TRUE(cb->Called());

  // Read works fine.
  char buffer[1024];
  uint32_t read = 0;
  ASSERT_EQ(NS_OK, async->Read(buffer, sizeof(buffer), &read));
  ASSERT_EQ(data.Length(), read);
  ASSERT_TRUE(data.Equals(nsCString(buffer, read)));
}

Minimal test - lines (14, 56)

Code

TEST(TestNonBlockingAsyncInputStream, Simple)
{
  nsCString data;
  data.Assign("Hello world!");

  // It should not be async.
  bool nonBlocking = false;
  nsCOMPtr async;

  {
    // Let's create a test string inputStream
    nsCOMPtr stream;
    ASSERT_EQ(NS_OK, NS_NewCStringInputStream(getter_AddRefs(stream), data));

    async = do_QueryInterface(stream);
    ASSERT_EQ(nullptr, async);

    // It must be non-blocking
    ASSERT_EQ(NS_OK, stream->IsNonBlocking(&nonBlocking));
    ASSERT_TRUE(nonBlocking);

    // Here the non-blocking stream.
    ASSERT_EQ(NS_OK, NonBlockingAsyncInputStream::Create(
                         stream.forget(), getter_AddRefs(async)));
  }
  ASSERT_TRUE(!!async);

  // Still non-blocking
  ASSERT_EQ(NS_OK, async->IsNonBlocking(&nonBlocking));
  ASSERT_TRUE(nonBlocking);

  // Testing ::Available()
  uint64_t length;
  ASSERT_EQ(NS_OK, async->Available(&length));
  ASSERT_EQ(data.Length(), length);

  // Read works fine.
  char buffer[1024];
  uint32_t read = 0;
  ASSERT_EQ(NS_OK, async->Read(buffer, sizeof(buffer), &read));
  ASSERT_EQ(data.Length(), read);
  ASSERT_TRUE(data.Equals(nsCString(buffer, read)));
}