From 3ea7e4bb6df4fe71e7743080bc607a0e0756d3b3 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 16 Oct 2025 17:33:21 +0000
Subject: [PATCH] Add comprehensive parallelizable LineCanvasTests (66 of 87
tests passing)
Co-authored-by: tig <585482+tig@users.noreply.github.com>
---
.../Drawing/LineCanvasTests.cs | 401 ++++++++++++++++++
1 file changed, 401 insertions(+)
create mode 100644 Tests/UnitTestsParallelizable/Drawing/LineCanvasTests.cs
diff --git a/Tests/UnitTestsParallelizable/Drawing/LineCanvasTests.cs b/Tests/UnitTestsParallelizable/Drawing/LineCanvasTests.cs
new file mode 100644
index 000000000..d9c9cac9c
--- /dev/null
+++ b/Tests/UnitTestsParallelizable/Drawing/LineCanvasTests.cs
@@ -0,0 +1,401 @@
+namespace Terminal.Gui.DrawingTests;
+
+///
+/// Tests for . All tests are parallelizable as they test LineCanvas directly
+/// without requiring Application.Driver or global state.
+///
+public class LineCanvasTests : UnitTests.Parallelizable.ParallelizableBase
+{
+ #region Add_2_Lines Tests - Line Intersection Tests
+
+ [Theory]
+ // Horizontal lines with a vertical zero-length
+ [InlineData (0, 0, 1, Orientation.Horizontal, LineStyle.Double, 0, 0, 0, Orientation.Vertical, LineStyle.Single, "╞")]
+ [InlineData (0, 0, -1, Orientation.Horizontal, LineStyle.Double, 0, 0, 0, Orientation.Vertical, LineStyle.Single, "╡")]
+ [InlineData (0, 0, 1, Orientation.Horizontal, LineStyle.Single, 0, 0, 0, Orientation.Vertical, LineStyle.Double, "╟")]
+ [InlineData (0, 0, -1, Orientation.Horizontal, LineStyle.Single, 0, 0, 0, Orientation.Vertical, LineStyle.Double, "╢")]
+ [InlineData (0, 0, 1, Orientation.Horizontal, LineStyle.Single, 0, 0, 0, Orientation.Vertical, LineStyle.Single, "├")]
+ [InlineData (0, 0, -1, Orientation.Horizontal, LineStyle.Single, 0, 0, 0, Orientation.Vertical, LineStyle.Single, "┤")]
+ [InlineData (0, 0, 1, Orientation.Horizontal, LineStyle.Double, 0, 0, 0, Orientation.Vertical, LineStyle.Double, "╠")]
+ [InlineData (0, 0, -1, Orientation.Horizontal, LineStyle.Double, 0, 0, 0, Orientation.Vertical, LineStyle.Double, "╣")]
+ // Vertical lines with a horizontal zero-length
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Double, 0, 0, 1, Orientation.Vertical, LineStyle.Single, "╥")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Double, 0, 0, -1, Orientation.Vertical, LineStyle.Single, "╨")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Single, 0, 0, 1, Orientation.Vertical, LineStyle.Double, "╤")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Single, 0, 0, -1, Orientation.Vertical, LineStyle.Double, "╧")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Single, 0, 0, 1, Orientation.Vertical, LineStyle.Single, "┬")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Single, 0, 0, -1, Orientation.Vertical, LineStyle.Single, "┴")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Double, 0, 0, 1, Orientation.Vertical, LineStyle.Double, "╦")]
+ [InlineData (0, 0, 0, Orientation.Horizontal, LineStyle.Double, 0, 0, -1, Orientation.Vertical, LineStyle.Double, "╩")]
+ // Both zero-length (cross)
+ [InlineData (0, 0, 0, Orientation.Vertical, LineStyle.Single, 0, 0, 0, Orientation.Horizontal, LineStyle.Single, "┼")]
+ [InlineData (0, 0, 0, Orientation.Vertical, LineStyle.Double, 0, 0, 0, Orientation.Horizontal, LineStyle.Single, "╫")]
+ [InlineData (0, 0, 0, Orientation.Vertical, LineStyle.Single, 0, 0, 0, Orientation.Horizontal, LineStyle.Double, "╪")]
+ [InlineData (0, 0, 0, Orientation.Vertical, LineStyle.Double, 0, 0, 0, Orientation.Horizontal, LineStyle.Double, "╬")]
+ public void Add_2_Lines_Creates_Correct_Intersection (
+ int x1,
+ int y1,
+ int len1,
+ Orientation o1,
+ LineStyle s1,
+ int x2,
+ int y2,
+ int len2,
+ Orientation o2,
+ LineStyle s2,
+ string expected
+ )
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (x1, y1), len1, o1, s1);
+ canvas.AddLine (new Point (x2, y2), len2, o2, s2);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ #endregion
+
+ #region Length Tests
+
+ [Theory]
+ [InlineData (0, 0, Orientation.Horizontal, "─")]
+ [InlineData (1, 0, Orientation.Horizontal, "─")]
+ [InlineData (0, 1, Orientation.Horizontal, "─")]
+ [InlineData (-1, 0, Orientation.Horizontal, "─")]
+ [InlineData (0, -1, Orientation.Horizontal, "─")]
+ [InlineData (-1, -1, Orientation.Horizontal, "─")]
+ [InlineData (0, 0, Orientation.Vertical, "│")]
+ [InlineData (1, 0, Orientation.Vertical, "│")]
+ [InlineData (0, 1, Orientation.Vertical, "│")]
+ [InlineData (0, -1, Orientation.Vertical, "│")]
+ [InlineData (-1, 0, Orientation.Vertical, "│")]
+ [InlineData (-1, -1, Orientation.Vertical, "│")]
+ public void Length_0_Creates_Single_Character_Line (int x, int y, Orientation orientation, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (x, y), 0, orientation, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ [Theory]
+ [InlineData (0, 0, 1, Orientation.Horizontal, "─")]
+ [InlineData (1, 0, 1, Orientation.Horizontal, "─")]
+ [InlineData (0, 1, 1, Orientation.Horizontal, "─")]
+ [InlineData (0, 0, 1, Orientation.Vertical, "│")]
+ [InlineData (1, 0, 1, Orientation.Vertical, "│")]
+ [InlineData (0, 1, 1, Orientation.Vertical, "│")]
+ [InlineData (-1, 0, 1, Orientation.Horizontal, "─")]
+ [InlineData (0, -1, 1, Orientation.Horizontal, "─")]
+ [InlineData (-1, 0, 1, Orientation.Vertical, "│")]
+ [InlineData (0, -1, 1, Orientation.Vertical, "│")]
+ [InlineData (0, 0, 2, Orientation.Horizontal, "──")]
+ [InlineData (0, 0, 3, Orientation.Horizontal, "───")]
+ [InlineData (0, 0, 2, Orientation.Vertical, "│\n│")]
+ [InlineData (0, 0, 3, Orientation.Vertical, "│\n│\n│")]
+ public void Length_n_Creates_Line_Of_Length_n (int x, int y, int length, Orientation orientation, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (x, y), length, orientation, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ [Fact]
+ public void Length_Negative_Creates_Line_In_Opposite_Direction ()
+ {
+ var canvas = new LineCanvas ();
+
+ // Add a horizontal line from (2, 0) going left (negative length)
+ canvas.AddLine (new Point (2, 0), -3, Orientation.Horizontal, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal ("───", actual);
+ }
+
+ [Theory]
+ [InlineData (Orientation.Horizontal, "─")]
+ [InlineData (Orientation.Vertical, "│")]
+ public void Length_Zero_Alone_Creates_Single_Line (Orientation orientation, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 0, orientation, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ [Theory]
+ [InlineData (Orientation.Horizontal, "┼")]
+ [InlineData (Orientation.Vertical, "┼")]
+ public void Length_Zero_Cross_Creates_Intersection (Orientation orientation, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 0, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 0), 0, orientation, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ [Theory]
+ [InlineData (Orientation.Horizontal, "┬")]
+ [InlineData (Orientation.Vertical, "├")]
+ public void Length_Zero_NextTo_Opposite_Creates_T (Orientation orientation, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 1, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 0), 0, orientation, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ #endregion
+
+ #region ToString Tests
+
+ [Fact]
+ public void ToString_Empty_Canvas_Returns_Empty_String ()
+ {
+ var canvas = new LineCanvas ();
+ Assert.Equal (string.Empty, canvas.ToString ());
+ }
+
+ [Theory]
+ [InlineData (0, 0, "─")]
+ [InlineData (1, 0, " ─")]
+ [InlineData (0, 1, "\n─")]
+ [InlineData (1, 1, "\n ─")]
+ [InlineData (2, 0, " ─")]
+ [InlineData (2, 1, "\n ─")]
+ [InlineData (0, 2, "\n\n─")]
+ [InlineData (2, 2, "\n\n ─")]
+ public void ToString_Positive_Horizontal_1Line_With_Offset (int x, int y, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (x, y), 1, Orientation.Horizontal, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ [Theory]
+ [InlineData (0, 0, "│")]
+ [InlineData (1, 0, " │")]
+ [InlineData (0, 1, "\n│")]
+ [InlineData (1, 1, "\n │")]
+ [InlineData (2, 0, " │")]
+ [InlineData (2, 1, "\n │")]
+ [InlineData (0, 2, "\n\n│")]
+ [InlineData (2, 2, "\n\n │")]
+ public void ToString_Positive_Vertical_1Line_With_Offset (int x, int y, string expected)
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (x, y), 1, Orientation.Vertical, LineStyle.Single);
+
+ string actual = canvas.ToString ();
+ Assert.Equal (expected, actual);
+ }
+
+ #endregion
+
+ #region Bounds Tests
+
+ [Fact]
+ public void Bounds_Empty_Canvas_Returns_Empty_Rectangle ()
+ {
+ var canvas = new LineCanvas ();
+ Assert.Equal (Rectangle.Empty, canvas.Bounds);
+ }
+
+ [Fact]
+ public void Bounds_Single_Point_Returns_1x1_Rectangle ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (5, 5), 0, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.Equal (new Rectangle (5, 5, 1, 1), canvas.Bounds);
+ }
+
+ [Fact]
+ public void Bounds_Horizontal_Line_Returns_Correct_Rectangle ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (2, 3), 5, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.Equal (new Rectangle (2, 3, 5, 1), canvas.Bounds);
+ }
+
+ [Fact]
+ public void Bounds_Vertical_Line_Returns_Correct_Rectangle ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (2, 3), 5, Orientation.Vertical, LineStyle.Single);
+
+ Assert.Equal (new Rectangle (2, 3, 1, 5), canvas.Bounds);
+ }
+
+ [Fact]
+ public void Bounds_Multiple_Lines_Returns_Union ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 0), 3, Orientation.Vertical, LineStyle.Single);
+
+ Assert.Equal (new Rectangle (0, 0, 5, 3), canvas.Bounds);
+ }
+
+ [Fact]
+ public void Bounds_Negative_Length_Included ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (5, 5), -3, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.Equal (new Rectangle (2, 5, 3, 1), canvas.Bounds);
+ }
+
+ #endregion
+
+ #region Lines Property Tests
+
+ [Fact]
+ public void Lines_Empty_Canvas_Returns_Empty_Collection ()
+ {
+ var canvas = new LineCanvas ();
+ Assert.Empty (canvas.Lines);
+ }
+
+ [Fact]
+ public void Lines_Returns_Added_Lines ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 0), 3, Orientation.Vertical, LineStyle.Double);
+
+ Assert.Equal (2, canvas.Lines.Count);
+ }
+
+ [Fact]
+ public void Lines_Is_ReadOnly ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.IsAssignableFrom> (canvas.Lines);
+ }
+
+ #endregion
+
+ #region GetMap Tests
+
+ [Fact]
+ public void GetMap_Empty_Canvas_Returns_Empty_Dictionary ()
+ {
+ var canvas = new LineCanvas ();
+ var map = canvas.GetMap ();
+
+ Assert.Empty (map);
+ }
+
+ [Fact]
+ public void GetMap_Single_Line_Returns_Correct_Points ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 3, Orientation.Horizontal, LineStyle.Single);
+
+ var map = canvas.GetMap ();
+
+ Assert.Equal (3, map.Count);
+ Assert.True (map.ContainsKey (new Point (0, 0)));
+ Assert.True (map.ContainsKey (new Point (1, 0)));
+ Assert.True (map.ContainsKey (new Point (2, 0)));
+ }
+
+ [Fact]
+ public void GetMap_Returns_Correct_Runes ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 3, Orientation.Horizontal, LineStyle.Single);
+
+ var map = canvas.GetMap ();
+
+ Assert.Equal (new System.Text.Rune ('─'), map [new Point (0, 0)]);
+ Assert.Equal (new System.Text.Rune ('─'), map [new Point (1, 0)]);
+ Assert.Equal (new System.Text.Rune ('─'), map [new Point (2, 0)]);
+ }
+
+ #endregion
+
+ #region Clear Tests
+
+ [Fact]
+ public void Clear_Removes_All_Lines ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 0), 3, Orientation.Vertical, LineStyle.Single);
+
+ canvas.Clear ();
+
+ Assert.Empty (canvas.Lines);
+ Assert.Equal (Rectangle.Empty, canvas.Bounds);
+ Assert.Empty (canvas.GetMap ());
+ }
+
+ #endregion
+
+ #region AddLine Tests
+
+ [Fact]
+ public void AddLine_Adds_Line_To_Canvas ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.Single (canvas.Lines);
+ }
+
+ [Fact]
+ public void AddLine_Multiple_Times_Adds_All_Lines ()
+ {
+ var canvas = new LineCanvas ();
+ canvas.AddLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 1), 5, Orientation.Horizontal, LineStyle.Single);
+ canvas.AddLine (new Point (0, 2), 5, Orientation.Horizontal, LineStyle.Single);
+
+ Assert.Equal (3, canvas.Lines.Count);
+ }
+
+ #endregion
+
+ #region Constructor Tests
+
+ [Fact]
+ public void Constructor_Creates_Empty_Canvas ()
+ {
+ var canvas = new LineCanvas ();
+
+ Assert.Empty (canvas.Lines);
+ Assert.Equal (Rectangle.Empty, canvas.Bounds);
+ }
+
+ [Fact]
+ public void Constructor_With_Lines_Creates_Canvas_With_Lines ()
+ {
+ var lines = new[]
+ {
+ new StraightLine (new Point (0, 0), 5, Orientation.Horizontal, LineStyle.Single),
+ new StraightLine (new Point (0, 0), 3, Orientation.Vertical, LineStyle.Single)
+ };
+
+ var canvas = new LineCanvas (lines);
+
+ Assert.Equal (2, canvas.Lines.Count);
+ }
+
+ #endregion
+}