1 files changed, 192 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/Helpers.h b/xpcom/tests/gtest/Helpers.h
new file mode 100644
index 0000000000..784a5d1b25
--- /dev/null
+++ b/xpcom/tests/gtest/Helpers.h
@@ -0,0 +1,192 @@
+/* -*- 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/. */
+
+#ifndef __Helpers_h
+#define __Helpers_h
+
+#include "nsCOMPtr.h"
+#include "nsIAsyncInputStream.h"
+#include "nsIAsyncOutputStream.h"
+#include "nsIInputStreamLength.h"
+#include "nsString.h"
+#include "nsStringStream.h"
+#include "nsTArrayForwardDeclare.h"
+#include "nsThreadUtils.h"
+#include <stdint.h>
+
+class nsIInputStream;
+class nsIOutputStream;
+
+namespace testing {
+
+void CreateData(uint32_t aNumBytes, nsTArray<char>& aDataOut);
+
+void Write(nsIOutputStream* aStream, const nsTArray<char>& aData,
+           uint32_t aOffset, uint32_t aNumBytes);
+
+void WriteAllAndClose(nsIOutputStream* aStream, const nsTArray<char>& aData);
+
+void ConsumeAndValidateStream(nsIInputStream* aStream,
+                              const nsTArray<char>& aExpectedData);
+
+void ConsumeAndValidateStream(nsIInputStream* aStream,
+                              const nsACString& aExpectedData);
+
+class OutputStreamCallback final : public nsIOutputStreamCallback {
+ public:
+  OutputStreamCallback();
+
+  bool Called() const { return mCalled; }
+
+ private:
+  ~OutputStreamCallback();
+
+  bool mCalled;
+
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOUTPUTSTREAMCALLBACK
+};
+
+class InputStreamCallback final : public nsIInputStreamCallback {
+ public:
+  InputStreamCallback();
+
+  bool Called() const { return mCalled; }
+
+ private:
+  ~InputStreamCallback();
+
+  bool mCalled;
+
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIINPUTSTREAMCALLBACK
+};
+
+class AsyncStringStream final : public nsIAsyncInputStream {
+  nsCOMPtr<nsIInputStream> mStream;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIINPUTSTREAM
+  NS_DECL_NSIASYNCINPUTSTREAM
+
+  explicit AsyncStringStream(const nsACString& aBuffer);
+
+ private:
+  ~AsyncStringStream() = default;
+
+  void MaybeExecCallback(nsIInputStreamCallback* aCallback,
+                         nsIEventTarget* aEventTarget);
+
+  nsCOMPtr<nsIInputStreamCallback> mCallback;
+  nsCOMPtr<nsIEventTarget> mCallbackEventTarget;
+};
+
+// This class implements a simple nsIInputStreamLength stream.
+class LengthInputStream : public nsIInputStream,
+                          public nsIInputStreamLength,
+                          public nsIAsyncInputStreamLength {
+  nsCOMPtr<nsIInputStream> mStream;
+  bool mIsInputStreamLength;
+  bool mIsAsyncInputStreamLength;
+  nsresult mLengthRv;
+  bool mNegativeValue;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  LengthInputStream(const nsACString& aBuffer, bool aIsInputStreamLength,
+                    bool aIsAsyncInputStreamLength, nsresult aLengthRv = NS_OK,
+                    bool aNegativeValue = false)
+      : mIsInputStreamLength(aIsInputStreamLength),
+        mIsAsyncInputStreamLength(aIsAsyncInputStreamLength),
+        mLengthRv(aLengthRv),
+        mNegativeValue(aNegativeValue) {
+    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);
+  }
+
+  NS_IMETHOD
+  Length(int64_t* aLength) override {
+    if (mNegativeValue) {
+      *aLength = -1;
+    } else {
+      mStream->Available((uint64_t*)aLength);
+    }
+    return mLengthRv;
+  }
+
+  NS_IMETHOD
+  AsyncLengthWait(nsIInputStreamLengthCallback* aCallback,
+                  nsIEventTarget* aEventTarget) override {
+    RefPtr<LengthInputStream> self = this;
+    nsCOMPtr<nsIInputStreamLengthCallback> callback = aCallback;
+
+    nsCOMPtr<nsIRunnable> r =
+        NS_NewRunnableFunction("AsyncLengthWait", [self, callback]() {
+          int64_t length;
+          self->Length(&length);
+          callback->OnInputStreamLengthReady(self, length);
+        });
+
+    return aEventTarget->Dispatch(r.forget(), NS_DISPATCH_NORMAL);
+  }
+
+ protected:
+  virtual ~LengthInputStream() = default;
+};
+
+class LengthCallback final : public nsIInputStreamLengthCallback {
+  bool mCalled;
+  int64_t mSize;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  LengthCallback() : mCalled(false), mSize(0) {}
+
+  NS_IMETHOD
+  OnInputStreamLengthReady(nsIAsyncInputStreamLength* aStream,
+                           int64_t aLength) override {
+    mCalled = true;
+    mSize = aLength;
+    return NS_OK;
+  }
+
+  bool Called() const { return mCalled; }
+
+  int64_t Size() const { return mSize; }
+
+ private:
+  ~LengthCallback() = default;
+};
+
+}  // namespace testing
+
+#endif  // __Helpers_h