1 files changed, 100 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestStringStream.cpp b/xpcom/tests/gtest/TestStringStream.cpp
new file mode 100644
index 0000000000..8314c3e74c
--- /dev/null
+++ b/xpcom/tests/gtest/TestStringStream.cpp
@@ -0,0 +1,100 @@
+/* -*- 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 "gtest/gtest.h"
+#include "Helpers.h"
+#include "mozilla/gtest/MozAssertions.h"
+#include "nsICloneableInputStream.h"
+#include "nsStringStream.h"
+#include "nsTArray.h"
+#include "nsIInputStream.h"
+#include "nsCOMPtr.h"
+#include "nsStreamUtils.h"
+#include "mozilla/Span.h"
+#include "nsISeekableStream.h"
+
+namespace {
+
+static void TestStringStream(uint32_t aNumBytes) {
+  nsTArray<char> inputData;
+  testing::CreateData(aNumBytes, inputData);
+  nsDependentCSubstring inputString(inputData.Elements(), inputData.Length());
+
+  nsCOMPtr<nsIInputStream> stream;
+  nsresult rv = NS_NewCStringInputStream(getter_AddRefs(stream), inputString);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  testing::ConsumeAndValidateStream(stream, inputString);
+}
+
+static void TestStringStreamClone(uint32_t aNumBytes) {
+  nsTArray<char> inputData;
+  testing::CreateData(aNumBytes, inputData);
+  nsDependentCSubstring inputString(inputData.Elements(), inputData.Length());
+
+  nsCOMPtr<nsIInputStream> stream;
+  nsresult rv = NS_NewCStringInputStream(getter_AddRefs(stream), inputString);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  nsCOMPtr<nsICloneableInputStream> cloneable = do_QueryInterface(stream);
+  ASSERT_TRUE(cloneable != nullptr);
+  ASSERT_TRUE(cloneable->GetCloneable());
+
+  nsCOMPtr<nsIInputStream> clone;
+  rv = cloneable->Clone(getter_AddRefs(clone));
+
+  testing::ConsumeAndValidateStream(stream, inputString);
+
+  // Release the stream to verify that the clone's string survives correctly.
+  stream = nullptr;
+
+  testing::ConsumeAndValidateStream(clone, inputString);
+}
+
+}  // namespace
+
+TEST(StringStream, Simple_4k)
+{ TestStringStream(1024 * 4); }
+
+TEST(StringStream, Clone_4k)
+{ TestStringStreamClone(1024 * 4); }
+
+static nsresult CloseStreamThenRead(nsIInputStream* aInStr, void* aClosure,
+                                    const char* aBuffer, uint32_t aOffset,
+                                    uint32_t aCount, uint32_t* aCountWritten) {
+  // Closing the stream will free the data
+  nsresult rv = aInStr->Close();
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  // This will likely be allocated in the same slot as what we have in aBuffer
+  char* newAlloc = moz_xstrdup("abcd");
+
+  char* toBuf = static_cast<char*>(aClosure);
+  memcpy(&toBuf[aOffset], aBuffer, aCount);
+  *aCountWritten = aCount;
+  free(newAlloc);
+  return NS_OK;
+}
+
+TEST(StringStream, CancelInReadSegments)
+{
+  char* buffer = moz_xstrdup("test");
+  nsCOMPtr<nsIInputStream> stream;
+  nsresult rv = NS_NewByteInputStream(
+      getter_AddRefs(stream), mozilla::Span(buffer, 5), NS_ASSIGNMENT_ADOPT);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  char buf[100];
+  uint32_t count = 0;
+  uint64_t available = 0;
+  rv = stream->Available(&available);
+  ASSERT_NS_SUCCEEDED(rv);
+  rv = stream->ReadSegments(CloseStreamThenRead, buf, available, &count);
+  ASSERT_NS_SUCCEEDED(rv);
+  ASSERT_TRUE(count == 5);
+  ASSERT_TRUE(!strcmp(buf, "test"));
+}