/*
 * Copyright (c) 2014, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "core/dom/Document.h"

#include "core/html/HTMLHeadElement.h"
#include "core/html/HTMLLinkElement.h"
#include "core/testing/DummyPageHolder.h"
#include "platform/heap/Handle.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>

using namespace blink;

namespace {

class DocumentTest : public ::testing::Test {
protected:
    virtual void SetUp() OVERRIDE;

#if ENABLE(OILPAN)
    virtual void TearDown() OVERRIDE
    {
        Heap::collectAllGarbage();
    }
#endif

    Document& document() const { return m_dummyPageHolder->document(); }
    Page& page() const { return m_dummyPageHolder->page(); }

private:
    OwnPtr<DummyPageHolder> m_dummyPageHolder;
};

void DocumentTest::SetUp()
{
    m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
}

class MockDocumentVisibilityObserver
    : public NoBaseWillBeGarbageCollectedFinalized<MockDocumentVisibilityObserver>
    , public DocumentVisibilityObserver {
    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MockDocumentVisibilityObserver);
public:
    static PassOwnPtrWillBeRawPtr<MockDocumentVisibilityObserver> create(Document& document)
    {
        return adoptPtrWillBeNoop(new MockDocumentVisibilityObserver(document));
    }

    virtual void trace(Visitor*) { }

    MOCK_METHOD1(didChangeVisibilityState, void(PageVisibilityState));

private:
    MockDocumentVisibilityObserver(Document& document) : DocumentVisibilityObserver(document) { }
};

TEST_F(DocumentTest, VisibilityOberver)
{
    page().setVisibilityState(PageVisibilityStateVisible, true); // initial state
    OwnPtrWillBeRawPtr<MockDocumentVisibilityObserver> observer1 = MockDocumentVisibilityObserver::create(document());

    {
        OwnPtrWillBeRawPtr<MockDocumentVisibilityObserver> observer2 = MockDocumentVisibilityObserver::create(document());
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        ::testing::Mock::VerifyAndClearExpectations(observer1.get());
        ::testing::Mock::VerifyAndClearExpectations(observer2.get());

        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(1);
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateHidden)).Times(1);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        page().setVisibilityState(PageVisibilityStateHidden, false);
        ::testing::Mock::VerifyAndClearExpectations(observer1.get());
        ::testing::Mock::VerifyAndClearExpectations(observer2.get());

        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        page().setVisibilityState(PageVisibilityStateHidden, false);
        ::testing::Mock::VerifyAndClearExpectations(observer1.get());
        ::testing::Mock::VerifyAndClearExpectations(observer2.get());

        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(1);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        OwnPtr<DummyPageHolder> alternatePage = DummyPageHolder::create(IntSize(800, 600));
        Document& alternateDocument = alternatePage->document();
        observer2->setObservedDocument(alternateDocument);
        page().setVisibilityState(PageVisibilityStateVisible, false);
        ::testing::Mock::VerifyAndClearExpectations(observer1.get());
        ::testing::Mock::VerifyAndClearExpectations(observer2.get());

        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(1);
        EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateHidden)).Times(1);
        EXPECT_CALL(*observer2, didChangeVisibilityState(PageVisibilityStateVisible)).Times(0);
        observer2->setObservedDocument(document());
        page().setVisibilityState(PageVisibilityStateHidden, false);
        ::testing::Mock::VerifyAndClearExpectations(observer1.get());
        ::testing::Mock::VerifyAndClearExpectations(observer2.get());
    }

    // observer2 destroyed
    EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateHidden)).Times(0);
    EXPECT_CALL(*observer1, didChangeVisibilityState(PageVisibilityStateVisible)).Times(1);
    page().setVisibilityState(PageVisibilityStateVisible, false);
}

// This test checks that Documunt::linkManifest() returns a value conform to the specification.
TEST_F(DocumentTest, LinkManifest)
{
    // Test the default result.
    EXPECT_EQ(0, document().linkManifest());

    // Check that we use the first manifest with <link rel=manifest>
    RefPtrWillBeRawPtr<HTMLLinkElement> link = HTMLLinkElement::create(document(), false);
    link->setAttribute(blink::HTMLNames::relAttr, "manifest");
    link->setAttribute(blink::HTMLNames::hrefAttr, "foo.json");
    document().head()->appendChild(link);
    EXPECT_EQ(link, document().linkManifest());

    RefPtrWillBeRawPtr<HTMLLinkElement> link2 = HTMLLinkElement::create(document(), false);
    link2->setAttribute(blink::HTMLNames::relAttr, "manifest");
    link2->setAttribute(blink::HTMLNames::hrefAttr, "bar.json");
    document().head()->insertBefore(link2, link.get());
    EXPECT_EQ(link2, document().linkManifest());
    document().head()->appendChild(link2);
    EXPECT_EQ(link, document().linkManifest());

    // Check that crazy URLs are accepted.
    link->setAttribute(blink::HTMLNames::hrefAttr, "http:foo.json");
    EXPECT_EQ(link, document().linkManifest());

    // Check that empty URLs are accepted.
    link->setAttribute(blink::HTMLNames::hrefAttr, "");
    EXPECT_EQ(link, document().linkManifest());

    // Check that URLs from different origins are accepted.
    link->setAttribute(blink::HTMLNames::hrefAttr, "http://example.org/manifest.json");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::hrefAttr, "http://foo.example.org/manifest.json");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::hrefAttr, "http://foo.bar/manifest.json");
    EXPECT_EQ(link, document().linkManifest());

    // More than one token in @rel is accepted.
    link->setAttribute(blink::HTMLNames::relAttr, "foo bar manifest");
    EXPECT_EQ(link, document().linkManifest());

    // Such as spaces around the token.
    link->setAttribute(blink::HTMLNames::relAttr, " manifest ");
    EXPECT_EQ(link, document().linkManifest());

    // Check that rel=manifest actually matters.
    link->setAttribute(blink::HTMLNames::relAttr, "");
    EXPECT_EQ(link2, document().linkManifest());
    link->setAttribute(blink::HTMLNames::relAttr, "manifest");

    // Check that link outside of the <head> are ignored.
    document().head()->removeChild(link.get(), ASSERT_NO_EXCEPTION);
    document().head()->removeChild(link2.get(), ASSERT_NO_EXCEPTION);
    EXPECT_EQ(0, document().linkManifest());
    document().body()->appendChild(link);
    EXPECT_EQ(0, document().linkManifest());
    document().head()->appendChild(link);
    document().head()->appendChild(link2);

    // Check that some attribute values do not have an effect.
    link->setAttribute(blink::HTMLNames::crossoriginAttr, "use-credentials");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::hreflangAttr, "klingon");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::typeAttr, "image/gif");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::sizesAttr, "16x16");
    EXPECT_EQ(link, document().linkManifest());
    link->setAttribute(blink::HTMLNames::mediaAttr, "print");
    EXPECT_EQ(link, document().linkManifest());
}

} // unnamed namespace