Introduce EditingTestBase to share code among test files for editing

Source/core/editing/EditingTestBase.cpp

Index: Source/core/editing/EditingTestBase.cpp
diff --git a/Source/core/editing/EditingTestBase.cpp b/Source/core/editing/EditingTestBase.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..d22b8d7e0fb046feb7439be5d14418472fa7a593
--- /dev/null
+++ b/Source/core/editing/EditingTestBase.cpp
@@ -0,0 +1,61 @@
+// 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 "core/editing/EditingTestBase.h"
+
+#include "core/dom/Document.h"
+#include "core/dom/Range.h"
+#include "core/dom/Text.h"
+#include "core/html/HTMLElement.h"
+#include "core/testing/DummyPageHolder.h"
+
+namespace blink {
+
+EditingTestBase::EditingTestBase()
+{
+}
+
+EditingTestBase::~EditingTestBase()
+{
+}
+
+Document& EditingTestBase::document() const
+{
+    return m_dummyPageHolder->document();
+}
+
+void EditingTestBase::SetUp()
+{
+    m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
+}
+
+PassRefPtrWillBeRawPtr<ShadowRoot> EditingTestBase::createShadowRootForElementWithIDAndSetInnerHTML(TreeScope& scope, const char* hostElementID, const char* shadowRootContent)
+{
+    RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = scope.getElementById(AtomicString::fromUTF8(hostElementID))->createShadowRoot(ASSERT_NO_EXCEPTION);
+    shadowRoot->setInnerHTML(String::fromUTF8(shadowRootContent), ASSERT_NO_EXCEPTION);
+    return shadowRoot.release();
+}
+
+void EditingTestBase::setBodyContent(const char* bodyContent)
+{
+    document().body()->setInnerHTML(String::fromUTF8(bodyContent), ASSERT_NO_EXCEPTION);
+}
+
+PassRefPtrWillBeRawPtr<ShadowRoot> EditingTestBase::setShadowContent(const char* shadowContent)
+{
+    return createShadowRootForElementWithIDAndSetInnerHTML(document(), "host", shadowContent);
+}
+
+Position EditingTestBase::positionInDOMTree(Node& anchor, int offset)
+{
+    return Position(&anchor, offset, Position::PositionIsOffsetInAnchor);
+}
+
+PositionInComposedTree EditingTestBase::positionInComposedTree(Node& anchor, int offset)
+{
+    return PositionInComposedTree(&anchor, offset, PositionInComposedTree::PositionIsOffsetInAnchor);
+}
+
+} // namespace blink