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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/custom/CustomElementReactionStack.h"
#include "core/dom/custom/CustomElementReaction.h"
#include "core/dom/custom/CustomElementReactionTestHelpers.h"
#include "core/dom/custom/CustomElementTestHelpers.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "wtf/text/AtomicString.h"
#include <initializer_list>
#include <vector>
namespace blink {
TEST(CustomElementReactionStackTest, one) {
std::vector<char> log;
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('a', log)}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'a'}))
<< "popping the reaction stack should run reactions";
}
TEST(CustomElementReactionStackTest, multipleElements) {
std::vector<char> log;
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('a', log)}));
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('b', log)}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'a', 'b'}))
<< "reactions should run in the order the elements queued";
}
TEST(CustomElementReactionStackTest, popTopEmpty) {
std::vector<char> log;
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('a', log)}));
stack->push();
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>())
<< "popping the empty top-of-stack should not run any reactions";
}
TEST(CustomElementReactionStackTest, popTop) {
std::vector<char> log;
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('a', log)}));
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('b', log)}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'b'}))
<< "popping the top-of-stack should only run top-of-stack reactions";
}
TEST(CustomElementReactionStackTest, requeueingDoesNotReorderElements) {
std::vector<char> log;
Element* element = CreateElement("a");
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(element, new TestReaction({new Log('a', log)}));
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('z', log)}));
stack->enqueueToCurrentQueue(element, new TestReaction({new Log('b', log)}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'a', 'b', 'z'}))
<< "reactions should run together in the order elements were queued";
}
TEST(CustomElementReactionStackTest, oneReactionQueuePerElement) {
std::vector<char> log;
Element* element = CreateElement("a");
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(element, new TestReaction({new Log('a', log)}));
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('z', log)}));
stack->push();
stack->enqueueToCurrentQueue(CreateElement("a"),
new TestReaction({new Log('y', log)}));
stack->enqueueToCurrentQueue(element, new TestReaction({new Log('b', log)}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'y', 'a', 'b'}))
<< "reactions should run together in the order elements were queued";
log.clear();
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'z'})) << "reactions should be run once";
}
class EnqueueToStack : public Command {
WTF_MAKE_NONCOPYABLE(EnqueueToStack);
public:
EnqueueToStack(CustomElementReactionStack* stack,
Element* element,
CustomElementReaction* reaction)
: m_stack(stack), m_element(element), m_reaction(reaction) {}
~EnqueueToStack() override = default;
DEFINE_INLINE_VIRTUAL_TRACE() {
Command::trace(visitor);
visitor->trace(m_stack);
visitor->trace(m_element);
visitor->trace(m_reaction);
}
void run(Element*) override {
m_stack->enqueueToCurrentQueue(m_element, m_reaction);
}
private:
Member<CustomElementReactionStack> m_stack;
Member<Element> m_element;
Member<CustomElementReaction> m_reaction;
};
TEST(CustomElementReactionStackTest, enqueueFromReaction) {
std::vector<char> log;
Element* element = CreateElement("a");
CustomElementReactionStack* stack = new CustomElementReactionStack();
stack->push();
stack->enqueueToCurrentQueue(
element, new TestReaction({new EnqueueToStack(
stack, element, new TestReaction({new Log('a', log)}))}));
stack->popInvokingReactions();
EXPECT_EQ(log, std::vector<char>({'a'})) << "enqueued reaction from another "
"reaction should run in the same "
"invoke";
}
} // namespace blink
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