Introduce FetchFormDataConsumerHandle.

Source/modules/fetch/FetchBlobDataConsumerHandleTest.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/fetch/FetchBlobDataConsumerHandle.h"
 
 #include "core/dom/ExecutionContext.h"
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "core/loader/ThreadableLoader.h"
@@ skipping 323 matching lines @@
     handle->obtainReader(nullptr)->read(nullptr, 0, kNone, &size);
     checkpoint.Call(1);
     testing::runPendingTasks();
     checkpoint.Call(2);
     client->didReceiveResponse(0, ResourceResponse(), src.release());
     HandleReaderRunner<HandleReader> runner(handle.release());
     OwnPtr<HandleReadResult> r = runner.wait();
     EXPECT_EQ(kUnexpectedError, r->result());
 }
 
+TEST_F(FetchBlobDataConsumerHandleTest, drainAsBlobDataHandle)
+{
+    auto factory = new StrictMock<MockLoaderFactory>;
+
+    RefPtr<BlobDataHandle> blobDataHandle = createBlobDataHandle("Once upon a time");
+    OwnPtr<FetchDataConsumerHandle> handle
+        = FetchBlobDataConsumerHandle::create(&document(), blobDataHandle, factory);
+
+    size_t size = 0;
+    EXPECT_EQ(blobDataHandle, handle->obtainReader(nullptr)->drainAsBlobDataHandle());
+    EXPECT_FALSE(handle->obtainReader(nullptr)->drainAsFormData());
+
+    EXPECT_EQ(kDone, handle->obtainReader(nullptr)->read(nullptr, 0, kNone, &size));
+}
+
+TEST_F(FetchBlobDataConsumerHandleTest, drainAsFormData)
+{
+    auto factory = new StrictMock<MockLoaderFactory>;
+
+    RefPtr<BlobDataHandle> blobDataHandle = createBlobDataHandle("Once upon a time");
+    OwnPtr<FetchDataConsumerHandle> handle
+        = FetchBlobDataConsumerHandle::create(&document(), blobDataHandle, factory);
+
+    RefPtr<FormData> formData = handle->obtainReader(nullptr)->drainAsFormData();
+    ASSERT_TRUE(formData);
+    EXPECT_TRUE(formData->hasOneRef());
+    ASSERT_EQ(1u, formData->elements().size());
+    EXPECT_EQ(FormDataElement::encodedBlob, formData->elements()[0].m_type);
+    EXPECT_EQ(blobDataHandle->uuid(), formData->elements()[0].m_blobUUID);
+    EXPECT_EQ(blobDataHandle, formData->elements()[0].m_optionalBlobDataHandle);
+
+    EXPECT_FALSE(handle->obtainReader(nullptr)->drainAsBlobDataHandle());
+    size_t size;
+    EXPECT_EQ(kDone, handle->obtainReader(nullptr)->read(nullptr, 0, kNone, &size));
+}
+
 } // namespace
 } // namespace blink