[terminal] IJPL-248564 Refactor TerminalCopyOnSelectionTest: extract MockFocusManager to the test framework

(cherry picked from commit c212ebb5184cb5c10bcdbf2441a461276e6833a3)

IJ-CR-211956

GitOrigin-RevId: ceefc3a5f841533b03ed65f4bad48d6b53e6f9ea

platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/ImmediatePainterTestCase.java

@@ -3,6 +3,7 @@ package com.intellij.openapi.editor.impl;
 
 import com.intellij.ide.ui.AntialiasingType;
 import com.intellij.ide.ui.UISettings;
+import com.intellij.mock.MockFocusManager;
 import com.intellij.openapi.actionSystem.DataContext;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.colors.EditorColors;

platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/MockFocusManager.java

@@ -1,32 +0,0 @@
-/*
- * Copyright 2000-2016 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.intellij.openapi.editor.impl;
-
-import javax.swing.FocusManager;
-import java.awt.Component;
-
-class MockFocusManager extends FocusManager {
-  private final Component myFocusOwner;
-
-  MockFocusManager(Component focusOwner) {
-    myFocusOwner = focusOwner;
-  }
-
-  @Override
-  public Component getFocusOwner() {
-    return myFocusOwner;
-  }
-}

platform/testFramework/src/com/intellij/mock/MockFocusManager.java

@@ -0,0 +1,18 @@
+// Copyright 2000-2026 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.mock;
+
+import javax.swing.FocusManager;
+import java.awt.Component;
+
+public final class MockFocusManager extends FocusManager {
+  private final Component myFocusOwner;
+
+  public MockFocusManager(Component focusOwner) {
+    myFocusOwner = focusOwner;
+  }
+
+  @Override
+  public Component getFocusOwner() {
+    return myFocusOwner;
+  }
+}

plugins/terminal/tests/src/com/intellij/terminal/tests/reworked/frontend/TerminalCopyOnSelectionTest.kt

@@ -1,5 +1,6 @@
 package com.intellij.terminal.tests.reworked.frontend
 
+import com.intellij.mock.MockFocusManager
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.LogicalPosition
 import com.intellij.openapi.ide.CopyPasteManager
@@ -18,8 +19,6 @@ import org.junit.Test
 import org.junit.jupiter.api.condition.OS
 import org.junit.runner.RunWith
 import org.junit.runners.JUnit4
-import java.awt.Component
-import java.awt.DefaultKeyboardFocusManager
 import java.awt.datatransfer.DataFlavor
 
 @RunWith(JUnit4::class)
@@ -93,9 +92,7 @@ internal class TerminalCopyOnSelectionTest : BasePlatformTestCase() {
     // Copy on selection only works if terminal is the focus owner.
     TerminalTestUtil.replaceKeyboardFocusManager(
       testRootDisposable,
-      object : DefaultKeyboardFocusManager() {
-        override fun getFocusOwner(): Component = editor.contentComponent
-      }
+      MockFocusManager(editor.contentComponent)
     )
     return editor
   }