1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/chrome_page_zoom.h"
6#include "content/public/common/page_zoom.h"
7#include "testing/gtest/include/gtest/gtest.h"
8
9TEST(ChromePageZoomTest, PresetZoomFactors) {
10  // Fetch a vector of preset zoom factors, including a custom value that we
11  // already know is not going to be in the list.
12  double custom_value = 1.05;  // 105%
13  std::vector<double> factors =
14      chrome_page_zoom::PresetZoomFactors(custom_value);
15
16  // Expect at least 10 zoom factors.
17  EXPECT_GE(factors.size(), 10U);
18
19  // Expect the first and last items to match the minimum and maximum values.
20  EXPECT_DOUBLE_EQ(factors.front(), content::kMinimumZoomFactor);
21  EXPECT_DOUBLE_EQ(factors.back(), content::kMaximumZoomFactor);
22
23  // Iterate through the vector, with the following checks:
24  // 1. The values are in sorted order.
25  // 2. The custom value is exists.
26  // 3. The 100% value exists.
27  bool found_custom_value = false;
28  bool found_100_percent = false;
29  double last_value = 0;
30
31  std::vector<double>::const_iterator i;
32  for (i = factors.begin(); i != factors.end(); ++i) {
33    double factor = *i;
34    EXPECT_GT(factor, last_value);
35    if (content::ZoomValuesEqual(factor, custom_value))
36      found_custom_value = true;
37    if (content::ZoomValuesEqual(factor, 1.0))
38      found_100_percent = true;
39    last_value = factor;
40  }
41
42  EXPECT_TRUE(found_custom_value);
43  EXPECT_TRUE(found_100_percent);
44}
45
46TEST(ChromePageZoomTest, PresetZoomLevels) {
47  // Fetch a vector of preset zoom levels, including a custom value that we
48  // already know is not going to be in the list.
49  double custom_value = 0.1;
50  std::vector<double> levels = chrome_page_zoom::PresetZoomLevels(custom_value);
51
52  // Expect at least 10 zoom levels.
53  EXPECT_GE(levels.size(), 10U);
54
55  // Iterate through the vector, with the following checks:
56  // 1. The values are in sorted order.
57  // 2. The custom value is exists.
58  // 3. The 100% value exists.
59  bool found_custom_value = false;
60  bool found_100_percent = false;
61  double last_value = -99;
62
63  std::vector<double>::const_iterator i;
64  for (i = levels.begin(); i != levels.end(); ++i) {
65    double level = *i;
66    EXPECT_GT(level, last_value);
67    if (content::ZoomValuesEqual(level, custom_value))
68      found_custom_value = true;
69    if (content::ZoomValuesEqual(level, 0))
70      found_100_percent = true;
71    last_value = level;
72  }
73
74  EXPECT_TRUE(found_custom_value);
75  EXPECT_TRUE(found_100_percent);
76}
77
78TEST(ChromePageZoomTest, InvalidCustomFactor) {
79  double too_low = 0.01;
80  std::vector<double> factors = chrome_page_zoom::PresetZoomFactors(too_low);
81  EXPECT_FALSE(content::ZoomValuesEqual(factors.front(), too_low));
82
83  double too_high = 99.0;
84  factors = chrome_page_zoom::PresetZoomFactors(too_high);
85  EXPECT_FALSE(content::ZoomValuesEqual(factors.back(), too_high));
86}
87
88TEST(ChromePageZoomTest, InvalidCustomLevel) {
89  double too_low = -99.0;
90  std::vector<double> levels = chrome_page_zoom::PresetZoomLevels(too_low);
91  EXPECT_FALSE(content::ZoomValuesEqual(levels.front(), too_low));
92
93  double too_high = 99.0;
94  levels = chrome_page_zoom::PresetZoomLevels(too_high);
95  EXPECT_FALSE(content::ZoomValuesEqual(levels.back(), too_high));
96}
97
98