Model, View and Controller for a Gap Buffer based one line text field in view...

views/controls/textfield/textfield_view_unittest.cc

+// Copyright (c) 2010 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 "gfx/canvas_skia.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "views/controls/textfield/textfield_view.h"
+#include "views/event.h"
+
+namespace views {
+
+void SendKeyEventToTextfield(TextfieldView* tf, base::KeyboardCode key_code) {
+  KeyEvent event(KeyEvent::ET_KEY_PRESSED, key_code, 0, 1, 0);
+  tf->OnKeyPressed(event);
+}
+
+TEST(TextfieldViewTest, ModelChangesTest) {
+  // Initialize textfield with a certain model.
+  TextfieldModel* model = new TextfieldModel(L"this is a test");
+  scoped_ptr<TextfieldView> textfield(new TextfieldView(model));
+  EXPECT_EQ(textfield->GetText(), L"this is a test");
+
+  // Modify model and check the textfield.
+  model->InsertBackspace();
+  EXPECT_EQ(textfield->GetText(), L"this is a tes");
+}
+
+TEST(TextfieldViewTest, InsertionDeletionTest) {
+  // Insert a test string in a textfield
+  std::wstring test_str(L"thisisatest");
+  scoped_ptr<TextfieldView> textfield(new TextfieldView());
+  for (unsigned i = 0; i < test_str.length(); i++) {
+    SendKeyEventToTextfield(textfield.get(), base::KeyboardCode(
+        static_cast<int>(base::VKEY_A) + (test_str[i] - 'a')));
+  }
+  EXPECT_EQ(textfield->GetText(), test_str);
+
+  // Move the cursor around.
+  for (int i = 0; i < 5; i++) {
+    SendKeyEventToTextfield(textfield.get(), base::VKEY_LEFT);
+  }
+  SendKeyEventToTextfield(textfield.get(), base::VKEY_RIGHT);
+
+  // Delete using backspace and check resulting string.
+  SendKeyEventToTextfield(textfield.get(), base::VKEY_BACK);
+  EXPECT_EQ(textfield->GetText(), L"thisistest");
+
+  // Delete using delete key and check resulting string.
+  for (int i = 0; i < 4; i++) {
+    SendKeyEventToTextfield(textfield.get(), base::VKEY_DELETE);
+  }
+  EXPECT_EQ(textfield->GetText(), L"thisis");
+}
+
+TEST(TextfieldViewTest, PaintTest) {
+  // Insert a test string in a textfield
+  std::wstring test_str(L"thisisatest");
+  gfx::CanvasSkia canvas(100, 100, true);
+  int tf_width = 20;
+  int visible_width = tf_width - 2 /* border width */;
+  scoped_ptr<TextfieldView> textfield(new TextfieldView());
+  textfield->SetBounds(0, 0, tf_width, 10);
+  textfield->Paint(&canvas);
+
+  for (unsigned i = 0; i < test_str.length(); i++) {
+    SendKeyEventToTextfield(textfield.get(), base::KeyboardCode(
+        static_cast<int>(base::VKEY_A) + (test_str[i] - 'a')));
+  }
+  textfield->Paint(&canvas);
+
+  EXPECT_EQ(textfield->GetText(), test_str);
+  std::wstring visible_str = test_str;
+  for (;textfield->font().GetStringWidth(visible_str) > visible_width;) {
+    visible_str = visible_str.substr(1);
+  }
+
+  // The cursor must be at the end of the box. check paint.
+  EXPECT_EQ(textfield->onscreen_cursor_pos(), visible_width);
+  EXPECT_EQ(textfield->visible_text(), visible_str);
+
+  // Move cursor left by one and check paint.
+  SendKeyEventToTextfield(textfield.get(), base::VKEY_LEFT);
+  EXPECT_EQ(textfield->onscreen_cursor_pos(),
+      visible_width - textfield->font().GetStringWidth(
+          visible_str.substr(visible_str.length() - 1)));
+  EXPECT_EQ(textfield->visible_text(), visible_str);
+
+  // Move cursor all the way to the begining and check paint.
+  for (unsigned i = 0; i < visible_str.length() - 1; i++) {
+    SendKeyEventToTextfield(textfield.get(), base::VKEY_LEFT);
+  }
+  EXPECT_EQ(textfield->onscreen_cursor_pos(),
+      visible_width - textfield->font().GetStringWidth(visible_str));
+  EXPECT_EQ(textfield->visible_text(), visible_str);
+
+  // Move cursor right by one and check paint.
+  SendKeyEventToTextfield(textfield.get(), base::VKEY_RIGHT);
+  EXPECT_EQ(textfield->onscreen_cursor_pos(),
+      visible_width - textfield->font().GetStringWidth(
+          visible_str.substr(1)));
+  EXPECT_EQ(textfield->visible_text(), visible_str);
+}
+}