From 33499aba569db4220e2721e6cec95d2b7b6f2754 Mon Sep 17 00:00:00 2001
From: Dmitry Batrak <Dmitry.Batrak@jetbrains.com>
Date: Mon, 11 Jul 2016 15:18:50 +0300
Subject: [PATCH] IDEA-158014 Incorrect scrolling in editor text field of small
 height

added test case
---
 .../openapi/editor/impl/EditorImplTest.java         | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/EditorImplTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/EditorImplTest.java
index 18b06bc74e4b..6f80ee23c22a 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/EditorImplTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/editor/impl/EditorImplTest.java
@@ -412,4 +412,17 @@ public class EditorImplTest extends AbstractEditorTest {
     mouse().pressAtLineNumbers(0).dragToLineNumbers(2).shift().release();
     checkResultByText("<selection>abc\ndef\nghi</selection>");
   }
+
+  public void testScrollingInEditorOfSmallHeight() throws Exception {
+    initText("abc\n<caret>");
+    int heightInPixels = (int)(myEditor.getLineHeight() * 1.5);
+    EditorTestUtil.setEditorVisibleSizeInPixels(myEditor,
+                                                1000 * EditorUtil.getSpaceWidth(Font.PLAIN, myEditor),
+                                                heightInPixels);
+    myEditor.getSettings().setAnimatedScrolling(false);
+    type('a');
+    assertEquals(heightInPixels - myEditor.getLineHeight(), myEditor.getScrollingModel().getVerticalScrollOffset());
+    type('b');
+    assertEquals(heightInPixels - myEditor.getLineHeight(), myEditor.getScrollingModel().getVerticalScrollOffset());
+  }
 }