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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/layout/LayoutText.h"
#include "core/layout/LayoutTestHelper.h"
#include "core/layout/line/InlineTextBox.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
namespace {
class LayoutTextTest : public RenderingTest {
public:
void setBasicBody(const char* message) {
setBodyInnerHTML(String::format(
"<div id='target' style='font-size: 10px;'>%s</div>", message));
}
LayoutText* getBasicText() {
return toLayoutText(getLayoutObjectByElementId("target")->slowFirstChild());
}
};
const char* kTacoText = "Los Compadres Taco Truck";
} // namespace
TEST_F(LayoutTextTest, WidthZeroFromZeroLength) {
setBasicBody(kTacoText);
ASSERT_EQ(0, getBasicText()->width(0u, 0u, LayoutUnit(), TextDirection::kLtr,
false));
}
TEST_F(LayoutTextTest, WidthMaxFromZeroLength) {
setBasicBody(kTacoText);
ASSERT_EQ(0, getBasicText()->width(std::numeric_limits<unsigned>::max(), 0u,
LayoutUnit(), TextDirection::kLtr, false));
}
TEST_F(LayoutTextTest, WidthZeroFromMaxLength) {
setBasicBody(kTacoText);
float width = getBasicText()->width(0u, std::numeric_limits<unsigned>::max(),
LayoutUnit(), TextDirection::kLtr, false);
// Width may vary by platform and we just want to make sure it's something
// roughly reasonable.
ASSERT_GE(width, 100.f);
ASSERT_LE(width, 160.f);
}
TEST_F(LayoutTextTest, WidthMaxFromMaxLength) {
setBasicBody(kTacoText);
ASSERT_EQ(0, getBasicText()->width(std::numeric_limits<unsigned>::max(),
std::numeric_limits<unsigned>::max(),
LayoutUnit(), TextDirection::kLtr, false));
}
TEST_F(LayoutTextTest, WidthWithHugeLengthAvoidsOverflow) {
// The test case from http://crbug.com/647820 uses a 288-length string, so for
// posterity we follow that closely.
setBodyInnerHTML(
"<div "
"id='target'>"
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
"xxxx"
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
"</div>");
// Width may vary by platform and we just want to make sure it's something
// roughly reasonable.
const float width = getBasicText()->width(
23u, 4294967282u, LayoutUnit(2.59375), TextDirection::kRtl, false);
ASSERT_GE(width, 100.f);
ASSERT_LE(width, 300.f);
}
TEST_F(LayoutTextTest, WidthFromBeyondLength) {
setBasicBody("x");
ASSERT_EQ(0u, getBasicText()->width(1u, 1u, LayoutUnit(), TextDirection::kLtr,
false));
}
TEST_F(LayoutTextTest, WidthLengthBeyondLength) {
setBasicBody("x");
// Width may vary by platform and we just want to make sure it's something
// roughly reasonable.
const float width =
getBasicText()->width(0u, 2u, LayoutUnit(), TextDirection::kLtr, false);
ASSERT_GE(width, 4.f);
ASSERT_LE(width, 20.f);
}
} // namespace blink
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