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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/zoom/page_zoom.h"
#include <algorithm>
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/page/page_zoom.h"
namespace {
bool ZoomValueExists(const std::vector<double>& zoom_values,
double expected_zoom_value) {
for (double zoom_value : zoom_values) {
if (blink::ZoomValuesEqual(zoom_value, expected_zoom_value)) {
return true;
}
}
return false;
}
} // namespace
TEST(PageTestZoom, PresetZoomFactors) {
// Fetch a vector of preset zoom factors, including a custom value that we
// already know is not going to be in the list.
double custom_value = 1.05; // 105%
std::vector<double> factors = zoom::PageZoom::PresetZoomFactors(custom_value);
// Expect at least 10 zoom factors.
EXPECT_GE(factors.size(), 10U);
// Expect the first and last items to match the minimum and maximum values.
EXPECT_DOUBLE_EQ(factors.front(), blink::kMinimumBrowserZoomFactor);
EXPECT_DOUBLE_EQ(factors.back(), blink::kMaximumBrowserZoomFactor);
EXPECT_TRUE(std::is_sorted(factors.begin(), factors.end()));
EXPECT_TRUE(ZoomValueExists(factors, custom_value));
EXPECT_TRUE(ZoomValueExists(factors, 1.0)); // 100%
}
TEST(PageTestZoom, PresetZoomLevels) {
// Fetch a vector of preset zoom levels, including a custom value that we
// already know is not going to be in the list.
double custom_value = 0.1;
std::vector<double> levels = zoom::PageZoom::PresetZoomLevels(custom_value);
// Expect at least 10 zoom levels.
EXPECT_GE(levels.size(), 10U);
EXPECT_TRUE(std::is_sorted(levels.begin(), levels.end()));
EXPECT_TRUE(ZoomValueExists(levels, custom_value));
EXPECT_TRUE(ZoomValueExists(levels, 0)); // 100% expressed as a zoom level
}
TEST(PageTestZoom, InvalidCustomFactor) {
double too_low = 0.01;
std::vector<double> factors = zoom::PageZoom::PresetZoomFactors(too_low);
EXPECT_FALSE(blink::ZoomValuesEqual(factors.front(), too_low));
double too_high = 99.0;
factors = zoom::PageZoom::PresetZoomFactors(too_high);
EXPECT_FALSE(blink::ZoomValuesEqual(factors.back(), too_high));
}
TEST(PageTestZoom, InvalidCustomLevel) {
double too_low = -99.0;
std::vector<double> levels = zoom::PageZoom::PresetZoomLevels(too_low);
EXPECT_FALSE(blink::ZoomValuesEqual(levels.front(), too_low));
double too_high = 99.0;
levels = zoom::PageZoom::PresetZoomLevels(too_high);
EXPECT_FALSE(blink::ZoomValuesEqual(levels.back(), too_high));
}
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