Editing: Fix caret blinking after a typing.

third_party/WebKit/Source/core/editing/FrameCaretTest.cpp

+// Copyright 2017 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/editing/FrameCaret.h"
+
+#include "core/editing/EditingTestBase.h"
+#include "core/editing/FrameSelection.h"
+#include "core/editing/commands/TypingCommand.h"
+#include "core/frame/FrameView.h"
+#include "core/layout/LayoutTheme.h"
+#include "core/page/FocusController.h"
+#include "platform/LayoutTestSupport.h"
+#include "platform/scheduler/test/fake_web_task_runner.h"
+
+namespace blink {
+
+class FrameCaretTest : public EditingTestBase {
+ public:
+  FrameCaretTest()
+      : m_wasRunningLayoutTest(LayoutTestSupport::isRunningLayoutTest()) {
+    // The caret blink timer doesn't work if isRunningLayoutTest() because
+    // LayoutTheme::caretBlinkInterval() returns 0.
+    LayoutTestSupport::setIsRunningLayoutTest(false);
+  }
+  ~FrameCaretTest() override {
+    LayoutTestSupport::setIsRunningLayoutTest(m_wasRunningLayoutTest);
+  }
+
+ private:
+  const bool m_wasRunningLayoutTest;
+};
+
+TEST_F(FrameCaretTest, BlinkAfterTyping) {
+  FrameCaret& caret = selection().frameCaretForTesting();
+  RefPtr<scheduler::FakeWebTaskRunner> taskRunner =
+      adoptRef(new scheduler::FakeWebTaskRunner);
+  taskRunner->setTime(0);
+  caret.recreateCaretBlinkTimerForTesting(taskRunner.get());
+  const double kInterval = 10;
+  LayoutTheme::theme().setCaretBlinkInterval(kInterval);
+  document().page()->focusController().setActive(true);
+  document().page()->focusController().setFocused(true);
+  document().body()->setInnerHTML("<textarea>");
+  Element* editor = toElement(document().body()->firstChild());
+  editor->focus();
+  document().view()->updateAllLifecyclePhases();
+
+  EXPECT_TRUE(caret.isActive());
+  EXPECT_FALSE(caret.shouldShowBlockCursor());
+  EXPECT_TRUE(caret.shouldPaintCaretForTesting())
+      << "Initially a caret should be in visible cycle.";
+
+  taskRunner->advanceTimeAndRun(kInterval);
+  EXPECT_FALSE(caret.shouldPaintCaretForTesting())
+      << "The caret blinks normally.";
+
+  TypingCommand::insertLineBreak(document());
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_TRUE(caret.shouldPaintCaretForTesting())
+      << "The caret should be in visible cycle just after a typing command.";
+
+  taskRunner->advanceTimeAndRun(kInterval - 1);
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_TRUE(caret.shouldPaintCaretForTesting())
+      << "The typing command reset the timer. The caret is still visible.";
+
+  taskRunner->advanceTimeAndRun(1);
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_FALSE(caret.shouldPaintCaretForTesting())
+      << "The caret should blink after the typing command.";
+}
+
+}  // namespace blink