1 files changed, 139 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/TextViewTests.cs b/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/TextViewTests.cs
new file mode 100644
index 0000000000..8c953d9c54
--- /dev/null
+++ b/main/src/core/MonoDevelop.TextEditor.Tests/Mono.TextEditor.Tests/TextViewTests.cs
@@ -0,0 +1,139 @@
+//
+// TextViewTests.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2018 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System.IO;
+using System.Text;
+using System.Linq;
+using NUnit.Framework;
+using Mono.TextEditor.Utils;
+using System.Reflection;
+using MonoDevelop.Core.Text;
+using MonoDevelop.Ide.Editor.Highlighting;
+using MonoDevelop.Ide.Editor;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+
+namespace Mono.TextEditor.Tests
+{
+	[TestFixture]
+	public class TextViewTests
+	{
+		class TestSyntaxMode : ISyntaxHighlighting
+		{
+			public event EventHandler<MonoDevelop.Ide.Editor.LineEventArgs> HighlightingStateChanged;
+
+			public void Dispose ()
+			{
+			}
+
+			public Task<HighlightedLine> GetHighlightedLineAsync (IDocumentLine line, CancellationToken cancellationToken)
+			{
+				var segments = new List<ColoredSegment> ();
+				for (int i = 0; i < line.Length;i++){
+					if (i > 0 && i == line.Length - 1) {
+						segments.Add (new ColoredSegment (i, 2, ScopeStack.Empty));
+						break;
+					}
+					segments.Add (new ColoredSegment (i, 1, ScopeStack.Empty));
+				}
+
+				return Task.FromResult (new HighlightedLine (line, segments));
+			}
+
+			public Task<ScopeStack> GetScopeStackAsync (int offset, CancellationToken cancellationToken)
+			{
+				return Task.FromResult (ScopeStack.Empty);
+			}
+		}
+
+		[Test]
+		public void TestFirstTimeUpdate ()
+		{
+			var editor = new MonoTextEditor ();
+			editor.GetTextEditorData ().Document.SyntaxMode = new TestSyntaxMode ();
+			editor.Text = @"1
+2
+3
+4
+5";
+			editor.Caret.Location = new DocumentLocation (2, 1);
+			editor.InsertAtCaret ("a");
+			Assert.IsTrue (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+		}
+
+		[Test]
+		public void TestSubsequentUpdate ()
+		{
+			var editor = new MonoTextEditor ();
+			editor.GetTextEditorData ().Document.SyntaxMode = new TestSyntaxMode ();
+			editor.Text = @"1
+2
+3
+4
+5";
+			editor.Caret.Location = new DocumentLocation (2, 1);
+			editor.InsertAtCaret ("a");
+			Assert.IsTrue (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+			editor.InsertAtCaret ("a");
+			Assert.IsFalse (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+		}
+
+		[Test]
+		public void TestBackspace ()
+		{
+			var editor = new MonoTextEditor ();
+			editor.GetTextEditorData ().Document.SyntaxMode = new TestSyntaxMode ();
+			editor.Text = @"1
+2
+3
+4
+5";
+			editor.Caret.Location = new DocumentLocation (2, 1);
+			editor.InsertAtCaret ("a");
+			Assert.IsTrue (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+			DeleteActions.Backspace (editor.GetTextEditorData ());
+			Assert.IsTrue (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+		}
+
+		[Test]
+		public void TestDeleteNoUpdate ()
+		{
+			var editor = new MonoTextEditor ();
+			editor.GetTextEditorData ().Document.SyntaxMode = new TestSyntaxMode ();
+			editor.Text = @"1
+2
+3
+4
+5";
+			editor.Caret.Location = new DocumentLocation (2, 1);
+			DeleteActions.Delete (editor.GetTextEditorData ());
+			Assert.IsFalse (editor.TextViewMargin.SpanUpdater.HasUpdatedMultilineSpan);
+		}
+
+	}
+}
+\ No newline at end of file