1 files changed, 378 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestNonBlockingAsyncInputStream.cpp b/xpcom/tests/gtest/TestNonBlockingAsyncInputStream.cpp
new file mode 100644
index 0000000000..fa2ac810a7
--- /dev/null
+++ b/xpcom/tests/gtest/TestNonBlockingAsyncInputStream.cpp
@@ -0,0 +1,378 @@
+#include "gtest/gtest.h"
+
+#include "mozilla/NonBlockingAsyncInputStream.h"
+#include "mozilla/SpinEventLoopUntil.h"
+#include "nsIAsyncInputStream.h"
+#include "nsIThread.h"
+#include "nsStreamUtils.h"
+#include "nsString.h"
+#include "nsStringStream.h"
+#include "Helpers.h"
+
+using mozilla::NonBlockingAsyncInputStream;
+using mozilla::SpinEventLoopUntil;
+
+TEST(TestNonBlockingAsyncInputStream, Simple)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  // It should not be async.
+  bool nonBlocking = false;
+  nsCOMPtr<nsIAsyncInputStream> async;
+
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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)));
+}
+
+class ReadSegmentsData {
+ public:
+  ReadSegmentsData(nsIInputStream* aStream, char* aBuffer)
+      : mStream(aStream), mBuffer(aBuffer) {}
+
+  nsIInputStream* mStream;
+  char* mBuffer;
+};
+
+static nsresult ReadSegmentsFunction(nsIInputStream* aInStr, void* aClosure,
+                                     const char* aBuffer, uint32_t aOffset,
+                                     uint32_t aCount, uint32_t* aCountWritten) {
+  ReadSegmentsData* data = static_cast<ReadSegmentsData*>(aClosure);
+  if (aInStr != data->mStream) return NS_ERROR_FAILURE;
+  memcpy(&data->mBuffer[aOffset], aBuffer, aCount);
+  *aCountWritten = aCount;
+  return NS_OK;
+}
+
+TEST(TestNonBlockingAsyncInputStream, ReadSegments)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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)));
+}
+
+TEST(TestNonBlockingAsyncInputStream, AsyncWait_Simple)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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<testing::InputStreamCallback> 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<nsIThread> thread = do_GetCurrentThread();
+
+  ASSERT_EQ(NS_OK, async->AsyncWait(cb, 0, 0, thread));
+  ASSERT_FALSE(cb->Called());
+  MOZ_ALWAYS_TRUE(SpinEventLoopUntil(
+      "xpcom:TEST(TestNonBlockingAsyncInputStream, AsyncWait_Simple)"_ns,
+      [&]() { 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)));
+}
+
+TEST(TestNonBlockingAsyncInputStream, AsyncWait_ClosureOnly_withoutEventTarget)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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 ::AsyncWait - no eventTarget
+  RefPtr<testing::InputStreamCallback> cb = new testing::InputStreamCallback();
+
+  ASSERT_EQ(NS_OK, async->AsyncWait(cb, nsIAsyncInputStream::WAIT_CLOSURE_ONLY,
+                                    0, nullptr));
+
+  ASSERT_FALSE(cb->Called());
+  ASSERT_EQ(NS_OK, async->Close());
+  ASSERT_TRUE(cb->Called());
+}
+
+TEST(TestNonBlockingAsyncInputStream, AsyncWait_ClosureOnly_withEventTarget)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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 ::AsyncWait - with EventTarget
+  RefPtr<testing::InputStreamCallback> cb = new testing::InputStreamCallback();
+  nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
+
+  ASSERT_EQ(NS_OK, async->AsyncWait(cb, nsIAsyncInputStream::WAIT_CLOSURE_ONLY,
+                                    0, thread));
+
+  ASSERT_FALSE(cb->Called());
+  ASSERT_EQ(NS_OK, async->Close());
+  ASSERT_FALSE(cb->Called());
+
+  MOZ_ALWAYS_TRUE(SpinEventLoopUntil(
+      "xpcom:TEST(TestNonBlockingAsyncInputStream, AsyncWait_ClosureOnly_withEventTarget)"_ns,
+      [&]() { return cb->Called(); }));
+  ASSERT_TRUE(cb->Called());
+}
+
+TEST(TestNonBlockingAsyncInputStream, Helper)
+{
+  nsCString data;
+  data.Assign("Hello world!");
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    // Let's create a test string inputStream
+    nsCOMPtr<nsIInputStream> 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);
+
+  // This should return the same object because async is already non-blocking
+  // and async.
+  nsCOMPtr<nsIAsyncInputStream> result;
+  nsCOMPtr<nsIAsyncInputStream> asyncTmp = async;
+  ASSERT_EQ(NS_OK, NS_MakeAsyncNonBlockingInputStream(asyncTmp.forget(),
+                                                      getter_AddRefs(result)));
+  ASSERT_EQ(async, result);
+
+  // This will use NonBlockingAsyncInputStream wrapper.
+  {
+    nsCOMPtr<nsIInputStream> stream;
+    ASSERT_EQ(NS_OK, NS_NewCStringInputStream(getter_AddRefs(stream), data));
+    ASSERT_EQ(NS_OK, NS_MakeAsyncNonBlockingInputStream(
+                         stream.forget(), getter_AddRefs(result)));
+  }
+  ASSERT_TRUE(async != result);
+  ASSERT_TRUE(async);
+}
+
+class QIInputStream final : public nsIInputStream,
+                            public nsICloneableInputStream,
+                            public nsIIPCSerializableInputStream,
+                            public nsISeekableStream {
+ public:
+  NS_DECL_ISUPPORTS
+
+  QIInputStream(bool aNonBlockingError, bool aCloneable, bool aIPCSerializable,
+                bool aSeekable)
+      : mNonBlockingError(aNonBlockingError),
+        mCloneable(aCloneable),
+        mIPCSerializable(aIPCSerializable),
+        mSeekable(aSeekable) {}
+
+  // nsIInputStream
+  NS_IMETHOD Close() override { return NS_ERROR_NOT_IMPLEMENTED; }
+  NS_IMETHOD Available(uint64_t*) override { return NS_ERROR_NOT_IMPLEMENTED; }
+  NS_IMETHOD Read(char*, uint32_t, uint32_t*) override {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+  NS_IMETHOD ReadSegments(nsWriteSegmentFun, void*, uint32_t,
+                          uint32_t*) override {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+  NS_IMETHOD IsNonBlocking(bool* aNonBlocking) override {
+    *aNonBlocking = true;
+    return mNonBlockingError ? NS_ERROR_FAILURE : NS_OK;
+  }
+
+  // nsICloneableInputStream
+  NS_IMETHOD GetCloneable(bool*) override { return NS_ERROR_NOT_IMPLEMENTED; }
+  NS_IMETHOD Clone(nsIInputStream**) override {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  // nsIIPCSerializableInputStream
+  void SerializedComplexity(uint32_t, uint32_t*, uint32_t*,
+                            uint32_t*) override {}
+  void Serialize(mozilla::ipc::InputStreamParams&, uint32_t,
+                 uint32_t*) override {}
+  bool Deserialize(const mozilla::ipc::InputStreamParams&) override {
+    return false;
+  }
+
+  // nsISeekableStream
+  NS_IMETHOD Seek(int32_t, int64_t) override {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+  NS_IMETHOD SetEOF() override { return NS_ERROR_NOT_IMPLEMENTED; }
+
+  // nsITellableStream
+  NS_IMETHOD Tell(int64_t*) override { return NS_ERROR_NOT_IMPLEMENTED; }
+
+ private:
+  ~QIInputStream() = default;
+
+  bool mNonBlockingError;
+  bool mCloneable;
+  bool mIPCSerializable;
+  bool mSeekable;
+};
+
+NS_IMPL_ADDREF(QIInputStream);
+NS_IMPL_RELEASE(QIInputStream);
+
+NS_INTERFACE_MAP_BEGIN(QIInputStream)
+  NS_INTERFACE_MAP_ENTRY(nsIInputStream)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsICloneableInputStream, mCloneable)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIIPCSerializableInputStream,
+                                     mIPCSerializable)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsISeekableStream, mSeekable)
+  NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsITellableStream, mSeekable)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInputStream)
+NS_INTERFACE_MAP_END
+
+TEST(TestNonBlockingAsyncInputStream, QI)
+{
+  // Let's test ::Create() returning error.
+
+  nsCOMPtr<nsIAsyncInputStream> async;
+  {
+    nsCOMPtr<nsIInputStream> stream = new QIInputStream(true, true, true, true);
+
+    ASSERT_EQ(NS_ERROR_FAILURE, NonBlockingAsyncInputStream::Create(
+                                    stream.forget(), getter_AddRefs(async)));
+  }
+
+  // Let's test the QIs
+  for (int i = 0; i < 8; ++i) {
+    bool shouldBeCloneable = !!(i & 0x01);
+    bool shouldBeSerializable = !!(i & 0x02);
+    bool shouldBeSeekable = !!(i & 0x04);
+
+    nsCOMPtr<nsICloneableInputStream> cloneable;
+    nsCOMPtr<nsIIPCSerializableInputStream> ipcSerializable;
+    nsCOMPtr<nsISeekableStream> seekable;
+
+    {
+      nsCOMPtr<nsIInputStream> stream = new QIInputStream(
+          false, shouldBeCloneable, shouldBeSerializable, shouldBeSeekable);
+
+      cloneable = do_QueryInterface(stream);
+      ASSERT_EQ(shouldBeCloneable, !!cloneable);
+
+      ipcSerializable = do_QueryInterface(stream);
+      ASSERT_EQ(shouldBeSerializable, !!ipcSerializable);
+
+      seekable = do_QueryInterface(stream);
+      ASSERT_EQ(shouldBeSeekable, !!seekable);
+
+      ASSERT_EQ(NS_OK, NonBlockingAsyncInputStream::Create(
+                           stream.forget(), getter_AddRefs(async)));
+    }
+
+    // The returned async stream should be cloneable only if the underlying
+    // stream is.
+    cloneable = do_QueryInterface(async);
+    ASSERT_EQ(shouldBeCloneable, !!cloneable);
+
+    // The returned async stream should be serializable only if the underlying
+    // stream is.
+    ipcSerializable = do_QueryInterface(async);
+    ASSERT_EQ(shouldBeSerializable, !!ipcSerializable);
+
+    // The returned async stream should be seekable only if the underlying
+    // stream is.
+    seekable = do_QueryInterface(async);
+    ASSERT_EQ(shouldBeSeekable, !!seekable);
+  }
+}