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// Copyright 2016 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 "core/dom/CSSSelectorWatch.h"
#include "core/dom/Document.h"
#include "core/dom/StyleEngine.h"
#include "core/frame/FrameView.h"
#include "core/html/HTMLElement.h"
#include "core/testing/DummyPageHolder.h"
#include "testing/gtest/include/gtest/gtest.h"
#include <memory>
namespace blink {
class CSSSelectorWatchTest : public ::testing::Test {
protected:
void SetUp() override;
Document& document() { return m_dummyPageHolder->document(); }
StyleEngine& styleEngine() { return document().styleEngine(); }
static const HashSet<String> addedSelectors(const CSSSelectorWatch& watch) {
return watch.m_addedSelectors;
}
static const HashSet<String> removedSelectors(const CSSSelectorWatch& watch) {
return watch.m_removedSelectors;
}
static void clearAddedRemoved(CSSSelectorWatch&);
private:
std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
};
void CSSSelectorWatchTest::SetUp() {
m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
}
void CSSSelectorWatchTest::clearAddedRemoved(CSSSelectorWatch& watch) {
watch.m_addedSelectors.clear();
watch.m_removedSelectors.clear();
}
TEST_F(CSSSelectorWatchTest, RecalcOnDocumentChange) {
document().body()->setInnerHTML(
"<div>"
" <span id='x' class='a'></span>"
" <span id='y' class='b'><span></span></span>"
" <span id='z'><span></span></span>"
"</div>");
CSSSelectorWatch& watch = CSSSelectorWatch::from(document());
Vector<String> selectors;
selectors.push_back(".a");
watch.watchCSSSelectors(selectors);
document().view()->updateAllLifecyclePhases();
selectors.clear();
selectors.push_back(".b");
selectors.push_back(".c");
selectors.push_back("#nomatch");
watch.watchCSSSelectors(selectors);
document().view()->updateAllLifecyclePhases();
Element* x = document().getElementById("x");
Element* y = document().getElementById("y");
Element* z = document().getElementById("z");
ASSERT_TRUE(x);
ASSERT_TRUE(y);
ASSERT_TRUE(z);
x->removeAttribute(HTMLNames::classAttr);
y->removeAttribute(HTMLNames::classAttr);
z->setAttribute(HTMLNames::classAttr, "c");
clearAddedRemoved(watch);
unsigned beforeCount = styleEngine().styleForElementCount();
document().view()->updateAllLifecyclePhases();
unsigned afterCount = styleEngine().styleForElementCount();
EXPECT_EQ(2u, afterCount - beforeCount);
EXPECT_EQ(1u, addedSelectors(watch).size());
EXPECT_TRUE(addedSelectors(watch).contains(".c"));
EXPECT_EQ(1u, removedSelectors(watch).size());
EXPECT_TRUE(removedSelectors(watch).contains(".b"));
}
} // namespace blink
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