Move unit tests per @tig.

UnitTests/Views/TextViewTests.cs

@@ -8756,4 +8756,250 @@ line.
 
         tv.Dispose ();
     }
+
+    [Fact]
+    public void Equals_True ()
+    {
+        var c1 = new Cell ();
+        var c2 = new Cell ();
+        Assert.True (c1.Equals (c2));
+        Assert.True (c2.Equals (c1));
+
+        c1.Rune = new ('a');
+        c1.Attribute = new ();
+        c2.Rune = new ('a');
+        c2.Attribute = new ();
+        Assert.True (c1.Equals (c2));
+        Assert.True (c2.Equals (c1));
+    }
+
+    [Fact]
+    [AutoInitShutdown]
+    public void CellEventArgs_WordWrap_True ()
+    {
+        var eventCount = 0;
+
+        List<List<Cell>> text =
+        [
+            Cell.ToCells (
+                          "This is the first line.".ToRunes ()
+                         ),
+
+            Cell.ToCells (
+                          "This is the second line.".ToRunes ()
+                         )
+        ];
+        TextView tv = CreateTextView ();
+        tv.DrawNormalColor += _textView_DrawColor;
+        tv.DrawReadOnlyColor += _textView_DrawColor;
+        tv.DrawSelectionColor += _textView_DrawColor;
+        tv.DrawUsedColor += _textView_DrawColor;
+
+        void _textView_DrawColor (object sender, CellEventArgs e)
+        {
+            Assert.Equal (e.Line [e.Col], text [e.UnwrappedPosition.Row] [e.UnwrappedPosition.Col]);
+            eventCount++;
+        }
+
+        tv.Text = $"{Cell.ToString (text [0])}\n{Cell.ToString (text [1])}\n";
+        Assert.False (tv.WordWrap);
+        var top = new Toplevel ();
+        top.Add (tv);
+        Application.Begin (top);
+
+        TestHelpers.AssertDriverContentsWithFrameAre (
+                                                      @"
+This is the first line. 
+This is the second line.",
+                                                      _output
+                                                     );
+
+        tv.Width = 10;
+        tv.Height = 25;
+        tv.WordWrap = true;
+        Application.Refresh ();
+
+        TestHelpers.AssertDriverContentsWithFrameAre (
+                                                      @"
+This is
+the    
+first  
+line.  
+This is
+the    
+second 
+line.  ",
+                                                      _output
+                                                     );
+
+        Assert.Equal (eventCount, (text [0].Count + text [1].Count) * 2);
+        top.Dispose ();
+    }
+
+    [Fact]
+    [AutoInitShutdown (configLocation: ConfigurationManager.ConfigLocations.DefaultOnly)]
+    public void Cell_LoadCells_InheritsPreviousAttribute ()
+    {
+        List<Cell> cells = [];
+
+        foreach (KeyValuePair<string, ColorScheme> color in Colors.ColorSchemes)
+        {
+            string csName = color.Key;
+
+            foreach (Rune rune in csName.EnumerateRunes ())
+            {
+                cells.Add (new () { Rune = rune, Attribute = color.Value.Normal });
+            }
+
+            cells.Add (new () { Rune = (Rune)'\n', Attribute = color.Value.Focus });
+        }
+
+        TextView tv = CreateTextView ();
+        tv.Load (cells);
+        var top = new Toplevel ();
+        top.Add (tv);
+        RunState rs = Application.Begin (top);
+        Assert.True (tv.InheritsPreviousAttribute);
+
+        var expectedText = @"
+TopLevel
+Base    
+Dialog  
+Menu    
+Error   ";
+        TestHelpers.AssertDriverContentsWithFrameAre (expectedText, _output);
+
+        Attribute [] attributes =
+        {
+            // 0
+            Colors.ColorSchemes ["TopLevel"].Normal,
+
+            // 1
+            Colors.ColorSchemes ["Base"].Normal,
+
+            // 2
+            Colors.ColorSchemes ["Dialog"].Normal,
+
+            // 3
+            Colors.ColorSchemes ["Menu"].Normal,
+
+            // 4
+            Colors.ColorSchemes ["Error"].Normal,
+
+            // 5
+            tv.ColorScheme!.Focus
+        };
+
+        var expectedColor = @"
+0000000055
+1111555555
+2222225555
+3333555555
+4444455555";
+        TestHelpers.AssertDriverAttributesAre (expectedColor, Application.Driver, attributes);
+
+        tv.WordWrap = true;
+        Application.Refresh ();
+        TestHelpers.AssertDriverContentsWithFrameAre (expectedText, _output);
+        TestHelpers.AssertDriverAttributesAre (expectedColor, Application.Driver, attributes);
+
+        tv.CursorPosition = new (6, 2);
+        tv.SelectionStartColumn = 0;
+        tv.SelectionStartRow = 0;
+        Assert.Equal ($"TopLevel{Environment.NewLine}Base{Environment.NewLine}Dialog", tv.SelectedText);
+        tv.Copy ();
+        tv.Selecting = false;
+        tv.CursorPosition = new (2, 4);
+        tv.Paste ();
+        Application.Refresh ();
+
+        expectedText = @"
+TopLevel  
+Base      
+Dialog    
+Menu      
+ErTopLevel
+Base      
+Dialogror ";
+        TestHelpers.AssertDriverContentsWithFrameAre (expectedText, _output);
+
+        expectedColor = @"
+0000000055
+1111555555
+2222225555
+3333555555
+4400000000
+1111555555
+2222224445";
+        TestHelpers.AssertDriverAttributesAre (expectedColor, Application.Driver, attributes);
+
+        tv.Undo ();
+        tv.CursorPosition = new (0, 3);
+        tv.SelectionStartColumn = 0;
+        tv.SelectionStartRow = 0;
+
+        Assert.Equal (
+                      $"TopLevel{Environment.NewLine}Base{Environment.NewLine}Dialog{Environment.NewLine}",
+                      tv.SelectedText
+                     );
+        tv.Copy ();
+        tv.Selecting = false;
+        tv.CursorPosition = new (2, 4);
+        tv.Paste ();
+        Application.Refresh ();
+
+        expectedText = @"
+TopLevel  
+Base      
+Dialog    
+Menu      
+ErTopLevel
+Base      
+Dialog    
+ror       ";
+        TestHelpers.AssertDriverContentsWithFrameAre (expectedText, _output);
+
+        expectedColor = @"
+0000000055
+1111555555
+2222225555
+3333555555
+4400000000
+1111555555
+2222225555
+4445555555";
+        TestHelpers.AssertDriverAttributesAre (expectedColor, Application.Driver, attributes);
+
+        Application.End (rs);
+        top.Dispose ();
+    }
+
+    [Fact]
+    public void Cell_LoadCells_Without_ColorScheme_Is_Never_Null ()
+    {
+        List<Cell> cells = new ()
+        {
+            new() { Rune = new ('T') },
+            new() { Rune = new ('e') },
+            new() { Rune = new ('s') },
+            new() { Rune = new ('t') }
+        };
+        TextView tv = CreateTextView ();
+        var top = new Toplevel ();
+        top.Add (tv);
+        tv.Load (cells);
+
+        for (var i = 0; i < tv.Lines; i++)
+        {
+            List<Cell> line = tv.GetLine (i);
+
+            foreach (Cell c in line)
+            {
+                Assert.NotNull (c.Attribute);
+            }
+        }
+    }
+
+    private TextView CreateTextView () { return new () { Width = 30, Height = 10 }; }
+
 }