// Copyright 2014 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/InputMethodController.h"

#include "core/frame/LocalFrame.h"
#include "core/html/HTMLDocument.h"
#include "core/html/HTMLInputElement.h"
#include "core/testing/DummyPageHolder.h"
#include <gtest/gtest.h>

using namespace blink;
using namespace WebCore;

namespace {

class InputMethodControllerTest : public ::testing::Test {
protected:
    InputMethodController& controller() { return frame().inputMethodController(); }
    HTMLDocument& document() const { return *m_document; }
    LocalFrame& frame() const { return m_dummyPageHolder->frame(); }

private:
    virtual void SetUp() OVERRIDE;

    OwnPtr<DummyPageHolder> m_dummyPageHolder;
    HTMLDocument* m_document;
};

void InputMethodControllerTest::SetUp()
{
    m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
    m_document = toHTMLDocument(&m_dummyPageHolder->document());
    ASSERT(m_document);
}

TEST_F(InputMethodControllerTest, BackspaceFromEndOfInput)
{
    document().write("<input id='sample'>");
    HTMLInputElement* input = toHTMLInputElement(document().getElementById("sample"));
    document().updateLayout();
    input->focus();

    input->setValue("fooX");
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("fooX", input->value().utf8().data());
    controller().extendSelectionAndDelete(0, 0);
    EXPECT_STREQ("fooX", input->value().utf8().data());

    input->setValue("fooX");
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("fooX", input->value().utf8().data());
    controller().extendSelectionAndDelete(1, 0);
    EXPECT_STREQ("foo", input->value().utf8().data());

    input->setValue(String::fromUTF8("foo\xE2\x98\x85")); // U+2605 == "black star"
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("foo\xE2\x98\x85", input->value().utf8().data());
    controller().extendSelectionAndDelete(1, 0);
    EXPECT_STREQ("foo", input->value().utf8().data());

    input->setValue(String::fromUTF8("foo\xF0\x9F\x8F\x86")); // U+1F3C6 == "trophy"
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("foo\xF0\x9F\x8F\x86", input->value().utf8().data());
    controller().extendSelectionAndDelete(1, 0);
    EXPECT_STREQ("foo", input->value().utf8().data());

    input->setValue(String::fromUTF8("foo\xE0\xB8\x81\xE0\xB9\x89")); // composed U+0E01 "ka kai" + U+0E49 "mai tho"
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("foo\xE0\xB8\x81\xE0\xB9\x89", input->value().utf8().data());
    controller().extendSelectionAndDelete(1, 0);
    EXPECT_STREQ("foo", input->value().utf8().data());

    input->setValue("fooX");
    controller().setEditableSelectionOffsets(PlainTextRange(4, 4));
    EXPECT_STREQ("fooX", input->value().utf8().data());
    controller().extendSelectionAndDelete(0, 1);
    EXPECT_STREQ("fooX", input->value().utf8().data());
}

} // namespace