added some inlays-related tests

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

+/*
+ * 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 com.intellij.testFramework.EditorTestUtil;
+
+public class EditorInlayTest extends AbstractEditorTest {
+  public void testCaretMovement() throws Exception {
+    initText("ab");
+    addInlay(1);
+    right();
+    checkCaretPosition(1, 1, 1);
+    right();
+    checkCaretPosition(1, 1, 2);
+    right();
+    checkCaretPosition(2, 2, 3);
+    left();
+    checkCaretPosition(1, 1, 2);
+    left();
+    checkCaretPosition(1, 1, 1);
+    left();
+    checkCaretPosition(0, 0, 0);
+  }
+
+  public void testFoldedInlay() throws Exception {
+    initText("abc");
+    addInlay(1);
+    addCollapsedFoldRegion(1, 2, ".");
+    right();
+    checkCaretPosition(1, 1, 1);
+    right();
+    checkCaretPosition(2, 2, 2);
+  }
+
+  public void testCaretMovementWithSelection() throws Exception {
+    initText("ab");
+    addInlay(1);
+    rightWithSelection();
+    checkCaretPositionAndSelection(1, 1, 1, 0, 1);
+    rightWithSelection();
+    checkCaretPositionAndSelection(2, 2, 3, 0, 2);
+    leftWithSelection();
+    checkCaretPositionAndSelection(1, 1, 1, 0, 1);
+    leftWithSelection();
+    checkCaretPositionAndSelection(0, 0, 0, 0, 0);
+
+    myEditor.getCaretModel().moveToOffset(2);
+    leftWithSelection();
+    checkCaretPositionAndSelection(1, 1, 2, 1, 2);
+    leftWithSelection();
+    checkCaretPositionAndSelection(0, 0, 0, 0, 2);
+    rightWithSelection();
+    checkCaretPositionAndSelection(1, 1, 2, 1, 2);
+    rightWithSelection();
+    checkCaretPositionAndSelection(2, 2, 3, 2, 2);
+  }
+
+  public void testBackspace() throws Exception {
+    initText("ab<caret>c");
+    addInlay(1);
+    backspace();
+    checkResultByText("ac");
+    checkCaretPosition(1, 1, 2);
+    backspace();
+    checkResultByText("ac");
+    checkCaretPosition(1, 1, 1);
+    backspace();
+    checkResultByText("c");
+    checkCaretPosition(0, 0, 0);
+  }
+
+  public void testDelete() throws Exception {
+    initText("a<caret>bc");
+    addInlay(2);
+    delete();
+    checkResultByText("ac");
+    checkCaretPosition(1, 1, 1);
+    delete();
+    checkResultByText("ac");
+    checkCaretPosition(1, 1, 2);
+    delete();
+    checkResultByText("a");
+    checkCaretPosition(1, 1, 2);
+  }
+
+  private static void checkCaretPositionAndSelection(int offset, int logicalColumn, int visualColumn,
+                                                     int selectionStartOffset, int selectionEndOffset) {
+    checkCaretPosition(offset, logicalColumn, visualColumn);
+    assertEquals(selectionStartOffset, myEditor.getSelectionModel().getSelectionStart());
+    assertEquals(selectionEndOffset, myEditor.getSelectionModel().getSelectionEnd());
+  }
+
+  private static void checkCaretPosition(int offset, int logicalColumn, int visualColumn) {
+    assertEquals(offset, myEditor.getCaretModel().getOffset());
+    assertEquals(0, myEditor.getCaretModel().getLogicalPosition().line);
+    assertEquals(logicalColumn, myEditor.getCaretModel().getLogicalPosition().column);
+    assertEquals(0, myEditor.getCaretModel().getVisualPosition().line);
+    assertEquals(visualColumn, myEditor.getCaretModel().getVisualPosition().column);
+  }
+
+  private static void addInlay(int offset) {
+    EditorTestUtil.addInlay(myEditor, offset);
+  }
+}

platform/testFramework/src/com/intellij/testFramework/EditorTestUtil.java

@@ -455,6 +455,17 @@ public class EditorTestUtil {
     return ref.get();
   }
 
+
+  public static void addInlay(@NotNull Editor editor, int offset) {
+    editor.getInlayModel().addInlineElement(offset, new EditorCustomElementRenderer() {
+      @Override
+      public int calcWidthInPixels(@NotNull Editor editor) { return 1; }
+
+      @Override
+      public void paint(@NotNull Editor editor, @NotNull Graphics g, @NotNull Rectangle r) {}
+    });
+  }
+
   public static class CaretAndSelectionState {
     public final List<CaretInfo> carets;
     public final TextRange blockSelection;

platform/testFramework/src/com/intellij/testFramework/LightPlatformCodeInsightTestCase.java

@@ -604,6 +604,14 @@ public abstract class LightPlatformCodeInsightTestCase extends LightPlatformTest
     executeAction("EditorRight");
   }
 
+  protected static void leftWithSelection() {
+    executeAction("EditorLeftWithSelection");
+  }
+
+  protected static void rightWithSelection() {
+    executeAction("EditorRightWithSelection");
+  }
+
   protected static void up() {
     executeAction("EditorUp");
   }