Revert 188637 "Added text line limits to collapsed and expanded ..."

ui/message_center/views/bounded_label_unittest.cc

-// Copyright (c) 2013 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 "ui/message_center/views/bounded_label.h"
-
-#include <limits>
-
-#include "base/string_util.h"
-#include "base/strings/string_split.h"
-#include "base/utf_string_conversions.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "ui/gfx/font.h"
-#include "ui/views/controls/label.h"
-
-namespace message_center {
-
-/* Test fixture declaration ***************************************************/
-
-class BoundedLabelTest : public testing::Test {
- public:
-  BoundedLabelTest();
-  virtual ~BoundedLabelTest();
-
-  // Replaces all occurences of three periods ("...") in the specified string
-  // with an ellipses character (UTF8 "\xE2\x80\xA6") and returns a string16
-  // with the results. This allows test strings to be specified as ASCII const
-  // char* strings, making tests more readable and easier to write.
-  string16 ToString(const char* string);
-
-  // Converts the specified elision width to pixels. To make tests somewhat
-  // independent of the fonts of the platform on which they're run, the elision
-  // widths are specified as XYZ integers, with the corresponding width in
-  // pixels being X times the width of digit characters plus Y times the width
-  // of spaces plus Z times the width of ellipses in the default font of the
-  // test plaform. It is assumed that all digits have the same width in that
-  // font, that this width is greater than the width of spaces, and that the
-  // width of 3 digits is greater than the width of ellipses.
-  int ToPixels(int width);
-
-  // Exercise BounderLabel::SplitLines() using the fixture's test label.
-  string16 SplitLines(int width);
-
-  // Exercise BounderLabel::GetPreferredLines() using the fixture's test label.
-  int GetPreferredLines(int width);
-
- protected:
-  // Creates a label to test with. Returns this fixture, which can be used to
-  // test the newly created label using the exercise methods above.
-  BoundedLabelTest& Label(string16 text, size_t lines);
-
- private:
-  gfx::Font font_;  // The default font, which will be used for tests.
-  int digit_pixels_;
-  int space_pixels_;
-  int ellipsis_pixels_;
-  scoped_ptr<BoundedLabel> label_;
-};
-
-/* Test fixture definition ****************************************************/
-
-BoundedLabelTest::BoundedLabelTest() {
-  digit_pixels_ = font_.GetStringWidth(UTF8ToUTF16("0"));
-  space_pixels_ = font_.GetStringWidth(UTF8ToUTF16(" "));
-  ellipsis_pixels_ = font_.GetStringWidth(UTF8ToUTF16("\xE2\x80\xA6"));
-}
-
-BoundedLabelTest::~BoundedLabelTest() {
-}
-
-string16 BoundedLabelTest::ToString(const char* string) {
-  const string16 periods = UTF8ToUTF16("...");
-  const string16 ellipses = UTF8ToUTF16("\xE2\x80\xA6");
-  string16 result = UTF8ToUTF16(string);
-  ReplaceSubstringsAfterOffset(&result, 0, periods, ellipses);
-  return result;
-}
-
-int BoundedLabelTest::ToPixels(int width) {
-  return digit_pixels_ * width / 100 +
-         space_pixels_ * (width % 100) / 10 +
-         ellipsis_pixels_ * (width % 10);
-}
-
-string16 BoundedLabelTest::SplitLines(int width) {
-  return JoinString(label_->SplitLines(width, label_->GetMaxLines()), '\n');
-}
-
-int BoundedLabelTest::GetPreferredLines(int width) {
-  label_->SetBounds(0, 0, width, font_.GetHeight() * label_->GetMaxLines());
-  return label_->GetPreferredLines();
-}
-
-BoundedLabelTest& BoundedLabelTest::Label(string16 text, size_t lines) {
-  label_.reset(new BoundedLabel(text, font_, lines));
-  return *this;
-}
-
-/* Test macro definitions *****************************************************/
-
-#define TEST_SPLIT_LINES(expected, text, width, lines) \
-  EXPECT_EQ(ToString(expected), \
-            Label(ToString(text), lines).SplitLines(ToPixels(width)))
-
-#define TEST_GET_PREFERRED_LINES(expected, text, width, lines) \
-  EXPECT_EQ(expected, \
-            Label(ToString(text), lines).GetPreferredLines(ToPixels(width)))
-
-/* Elision tests **************************************************************/
-
-TEST_F(BoundedLabelTest, ElisionTest) {
-  // One word per line: No ellision should be made when not necessary.
-  TEST_SPLIT_LINES("123", "123", 301, 1);
-  TEST_SPLIT_LINES("123", "123", 301, 2);
-  TEST_SPLIT_LINES("123", "123", 301, 3);
-  TEST_SPLIT_LINES("123\n456", "123 456", 0, 2);  // 301, 2);
-  TEST_SPLIT_LINES("123\n456", "123 456", 301, 3);
-  TEST_SPLIT_LINES("123\n456\n789", "123 456 789", 301, 3);
-
-  // One word per line: Ellisions should be made when necessary.
-  TEST_SPLIT_LINES("123...", "123 456", 301, 1);
-  TEST_SPLIT_LINES("123...", "123 456 789", 301, 1);
-  TEST_SPLIT_LINES("123\n456...", "123 456 789", 301, 2);
-
-  // Two words per line: No ellision should be made when not necessary.
-  TEST_SPLIT_LINES("123 456", "123 456", 621, 1);
-  TEST_SPLIT_LINES("123 456", "123 456", 621, 2);
-  TEST_SPLIT_LINES("123 456", "123 456", 621, 3);
-  TEST_SPLIT_LINES("123 456\n789 012", "123 456 789 012", 621, 2);
-  TEST_SPLIT_LINES("123 456\n789 012", "123 456 789 012", 621, 3);
-  TEST_SPLIT_LINES("123 456\n789 012\n345 678",
-                   "123 456 789 012 345 678", 621, 3);
-
-  // Two words per line: Ellisions should be made when necessary.
-  TEST_SPLIT_LINES("123 456...", "123 456 789 012", 621, 1);
-  TEST_SPLIT_LINES("123 456...", "123 456 789 012 345 678", 621, 1);
-  TEST_SPLIT_LINES("123 456\n789 012...", "123 456 789 012 345 678", 621, 2);
-
-  // Single trailing spaces: No ellipses should be added.
-  TEST_SPLIT_LINES("123", "123 ", 301, 1);
-  TEST_SPLIT_LINES("123\n456", "123 456 ", 301, 2);
-  TEST_SPLIT_LINES("123\n456\n789", "123 456 789 ", 301, 3);
-  TEST_SPLIT_LINES("123 456", "123 456 ", 611, 1);
-  TEST_SPLIT_LINES("123 456\n789 012", "123 456 789 012 ", 611, 2);
-  TEST_SPLIT_LINES("123 456\n789 012\n345 678",
-                   "123 456 789 012 345 678 ", 611, 3);
-
-  // Multiple trailing spaces: No ellipses should be added.
-  TEST_SPLIT_LINES("123", "123         ", 301, 1);
-  TEST_SPLIT_LINES("123\n456", "123 456         ", 301, 2);
-  TEST_SPLIT_LINES("123\n456\n789", "123 456 789         ", 301, 3);
-  TEST_SPLIT_LINES("123 456", "123 456         ", 611, 1);
-  TEST_SPLIT_LINES("123 456\n789 012", "123 456 789 012         ", 611, 2);
-  TEST_SPLIT_LINES("123 456\n789 012\n345 678",
-                   "123 456 789 012 345 678         ", 611, 3);
-
-  // Multiple spaces between words on the same line: Spaces should be preserved.
-  // Test cases for single spaces between such words are included in the "Two
-  // words per line" sections above.
-  TEST_SPLIT_LINES("123  456", "123  456", 621, 1);
-  TEST_SPLIT_LINES("123  456...", "123  456 789   012", 631, 1);
-  TEST_SPLIT_LINES("123  456\n789   012", "123  456 789   012", 631, 2);
-  TEST_SPLIT_LINES("123  456...", "123  456 789   012  345    678", 621, 1);
-  TEST_SPLIT_LINES("123  456\n789   012...",
-                   "123  456 789   012 345    678", 631, 2);
-  TEST_SPLIT_LINES("123  456\n789   012\n345    678",
-                   "123  456 789   012 345    678", 641, 3);
-
-  // Multiple spaces between words split across lines: Spaces should be removed
-  // even if lines are wide enough to include those spaces. Test cases for
-  // single spaces between such words are included in the "Two words  per line"
-  // sections above.
-  TEST_SPLIT_LINES("123\n456", "123  456", 321, 2);
-  TEST_SPLIT_LINES("123\n456", "123         456", 391, 2);
-  TEST_SPLIT_LINES("123\n456...", "123  456  789", 321, 2);
-  TEST_SPLIT_LINES("123\n456...", "123         456         789", 391, 2);
-  TEST_SPLIT_LINES("123  456\n789  012", "123  456  789  012", 641, 2);
-  TEST_SPLIT_LINES("123  456\n789  012...", "123  456  789  012  345  678",
-                    641, 2);
-
-  // TODO(dharcourt): Add test cases to verify that:
-  // - Spaces before elisions are removed
-  // - Leading spaces are preserved
-  // - Words are split when they are longer than lines
-  // - Words are clipped when they are longer than the last line
-  // - No blank line are created before or after clipped word
-  // - Spaces at the end of the text are removed
-
-  // TODO(dharcourt): Add test cases for:
-  // - Empty and very large strings
-  // - Zero and very large max lines values
-  // - Other input boundary conditions
-  // TODO(dharcourt): Add some randomly generated fuzz test cases.
-
-}
-
-/* GetPreferredLinesTest ******************************************************/
-
-TEST_F(BoundedLabelTest, GetPreferredLinesTest) {
-  // Zero, small, and negative width values should yield one word per line.
-  TEST_GET_PREFERRED_LINES(2, "123 456", 0, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", 1, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", 2, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", 3, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", -1, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", -2, 1);
-  TEST_GET_PREFERRED_LINES(2, "123 456", std::numeric_limits<int>::min(), 1);
-
-  // Large width values should yield all words on one line.
-  TEST_GET_PREFERRED_LINES(1, "123 456", 610, 1);
-  TEST_GET_PREFERRED_LINES(1, "123 456", std::numeric_limits<int>::max(), 1);
-}
-
-/* Other tests ****************************************************************/
-
-// TODO(dharcourt): Add test cases to verify that:
-// - SetMaxLines() affects GetMaxLines(), GetHeightForWidth(), GetTextSize(),
-//   and GetTextLines() return values but not GetPreferredLines() or
-//   GetTextSize() ones.
-// - Bound changes affects GetPreferredLines(), GetTextSize(), and
-//   GetTextLines() return values.
-// - GetTextFlags are as expected.
-
-}  // namespace message_center