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// Copyright (c) 2010 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 <vector>
#include "base/file_path.h"
#include "base/message_loop.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "third_party/WebKit/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/WebKit/chromium/public/WebElement.h"
#include "third_party/WebKit/WebKit/chromium/public/WebEvent.h"
#include "third_party/WebKit/WebKit/chromium/public/WebEventListener.h"
#include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/WebKit/chromium/public/WebMutationEvent.h"
#include "third_party/WebKit/WebKit/chromium/public/WebScriptSource.h"
#include "third_party/WebKit/WebKit/chromium/public/WebView.h"
#include "webkit/tools/test_shell/test_shell.h"
#include "webkit/tools/test_shell/test_shell_request_context.h"
#include "webkit/tools/test_shell/test_shell_test.h"
namespace {
using namespace WebKit;
// This test exercices the event listener API from the WebKit API.
class WebEventListenerTest : public TestShellTest {
public:
virtual void SetUp() {
TestShellTest::SetUp();
FilePath event_test_file;
ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &event_test_file));
event_test_file = event_test_file.Append(FILE_PATH_LITERAL("webkit"))
.Append(FILE_PATH_LITERAL("data"))
.Append(FILE_PATH_LITERAL("listener"))
.Append(FILE_PATH_LITERAL("mutation_event_listener.html"));
test_shell_->LoadFile(event_test_file);
test_shell_->WaitTestFinished();
}
virtual void TearDown() {
TestShellTest::TearDown();
}
WebFrame* main_frame() const {
return test_shell_->webView()->mainFrame();
}
WebDocument document() const {
return main_frame()->document();
}
void ExecuteScript(const char* code) {
main_frame()->executeScript(WebScriptSource(WebString::fromUTF8(code)));
}
static WebString GetNodeID(const WebNode& node) {
if (node.nodeType() != WebNode::ElementNode)
return WebString();
WebElement element = node.toConst<WebElement>();
return element.getAttribute("id");
}
};
class TestWebEventListener : public WebEventListener {
public:
TestWebEventListener() {}
virtual ~TestWebEventListener() {}
virtual void handleEvent(const WebEvent& event) {
events_.push_back(event);
}
size_t event_count() const { return events_.size(); }
WebEvent GetEventAt(int index) const { return events_.at(index); }
void ClearEvents() { events_.clear(); }
private:
std::vector<WebEvent> events_;
};
// Tests that the right mutation events are fired when a node is added/removed.
// Note that the DOMSubtreeModified event is fairly vage, it only tells you
// something changed for the target node.
TEST_F(WebEventListenerTest, NodeAddedRemovedMutationEvent) {
TestWebEventListener event_listener;
document().addEventListener("DOMSubtreeModified", &event_listener, false);
// Test adding a node.
ExecuteScript("addElement('newNode')");
ASSERT_EQ(1U, event_listener.event_count());
WebEvent event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
// No need to check any of the MutationEvent, WebKit does not set any.
EXPECT_EQ("DIV", event.target().nodeName());
EXPECT_EQ("topDiv", GetNodeID(event.target()));
event_listener.ClearEvents();
// Test removing a node.
ExecuteScript("removeNode('div1')");
ASSERT_EQ(1U, event_listener.event_count());
event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
EXPECT_EQ("DIV", event.target().nodeName());
EXPECT_EQ("topDiv", GetNodeID(event.target()));
}
// Tests the right mutation event is fired when a text node is modified.
TEST_F(WebEventListenerTest, TextNodeModifiedMutationEvent) {
TestWebEventListener event_listener;
document().addEventListener("DOMSubtreeModified", &event_listener, false);
ExecuteScript("changeText('div2', 'Hello')");
ASSERT_EQ(1U, event_listener.event_count());
WebEvent event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
ASSERT_EQ(WebNode::TextNode, event.target().nodeType());
}
// Tests the right mutation events are fired when an attribute is added/removed.
TEST_F(WebEventListenerTest, AttributeMutationEvent) {
TestWebEventListener event_listener;
document().addEventListener("DOMSubtreeModified", &event_listener, false);
ExecuteScript("document.getElementById('div2').setAttribute('myAttr',"
"'some value')");
ASSERT_EQ(1U, event_listener.event_count());
WebEvent event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
EXPECT_EQ("DIV", event.target().nodeName());
EXPECT_EQ("div2", GetNodeID(event.target()));
event_listener.ClearEvents();
ExecuteScript("document.getElementById('div2').removeAttribute('myAttr')");
ASSERT_EQ(1U, event_listener.event_count());
event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
EXPECT_EQ("DIV", event.target().nodeName());
EXPECT_EQ("div2", GetNodeID(event.target()));
}
// Tests destroying WebEventListener and triggering events, we shouldn't crash.
TEST_F(WebEventListenerTest, FireEventDeletedListener) {
TestWebEventListener* event_listener = new TestWebEventListener();
document().addEventListener("DOMSubtreeModified", event_listener, false);
delete event_listener;
ExecuteScript("addElement('newNode')"); // That should fire an event.
}
// Tests registering several events on the same WebEventListener and triggering
// events.
TEST_F(WebEventListenerTest, SameListenerMultipleEvents) {
TestWebEventListener event_listener;
const WebString kDOMSubtreeModifiedType("DOMSubtreeModified");
const WebString kDOMNodeRemovedType("DOMNodeRemoved");
document().addEventListener(kDOMSubtreeModifiedType, &event_listener, false);
WebElement div1_elem = document().getElementById("div1");
div1_elem.addEventListener(kDOMNodeRemovedType, &event_listener, false);
// Trigger a DOMSubtreeModified event by adding a node.
ExecuteScript("addElement('newNode')");
ASSERT_EQ(1U, event_listener.event_count());
WebEvent event = event_listener.GetEventAt(0);
ASSERT_TRUE(event.isMutationEvent());
EXPECT_EQ("DIV", event.target().nodeName());
EXPECT_EQ("topDiv", GetNodeID(event.target()));
event_listener.ClearEvents();
// Trigger for both event listener by removing the div1 node.
ExecuteScript("removeNode('div1')");
ASSERT_EQ(2U, event_listener.event_count());
// Not sure if the order of the events is important. Assuming no specific
// order.
WebString type1 = event_listener.GetEventAt(0).type();
WebString type2 = event_listener.GetEventAt(1).type();
EXPECT_TRUE(type1 == kDOMSubtreeModifiedType || type1 == kDOMNodeRemovedType);
EXPECT_TRUE(type2 == kDOMSubtreeModifiedType || type2 == kDOMNodeRemovedType);
EXPECT_TRUE(type1 != type2);
}
// Tests removing event listeners.
TEST_F(WebEventListenerTest, RemoveEventListener) {
TestWebEventListener event_listener;
const WebString kDOMSubtreeModifiedType("DOMSubtreeModified");
// Adding twice the same listener for the same event, should be supported.
document().addEventListener(kDOMSubtreeModifiedType, &event_listener, false);
document().addEventListener(kDOMSubtreeModifiedType, &event_listener, false);
// Add a node, that should trigger 2 events.
ExecuteScript("addElement('newNode')");
EXPECT_EQ(2U, event_listener.event_count());
event_listener.ClearEvents();
// Remove one listener and trigger an event again.
document().removeEventListener(kDOMSubtreeModifiedType,
&event_listener, false);
ExecuteScript("addElement('newerNode')");
EXPECT_EQ(1U, event_listener.event_count());
event_listener.ClearEvents();
// Remove the last listener and trigger yet another event.
document().removeEventListener(kDOMSubtreeModifiedType,
&event_listener, false);
ExecuteScript("addElement('newererNode')");
EXPECT_EQ(0U, event_listener.event_count());
}
} // namespace
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