[MWF] Add unit tests for DataGridViewRowHeightInfoNeededEventArgs

diff --git a/mcs/class/Managed.Windows.Forms/System.Windows.Forms_test.dll.sources b/mcs/class/Managed.Windows.Forms/System.Windows.Forms_test.dll.sources
index a18ec387a895587a17b10f5669f3221e6ee1c173..e14341db1a9f62588375b5e9dcbf84466e5f7dca 100644 (file)
--- a/mcs/class/Managed.Windows.Forms/System.Windows.Forms_test.dll.sources
+++ b/mcs/class/Managed.Windows.Forms/System.Windows.Forms_test.dll.sources
@@ -63,6 +63,7 @@ System.Windows.Forms/DataGridViewLinkCellTest.cs
 System.Windows.Forms/DataGridViewImageCellTest.cs
 System.Windows.Forms/DataGridViewRowCollectionTest.cs
 System.Windows.Forms/DataGridViewRowHeaderTest.cs
+System.Windows.Forms/DataGridViewRowHeightInfoNeededEventArgsTests.cs
 System.Windows.Forms/DataGridViewRowTest.cs
 System.Windows.Forms/DataGridViewTest.cs
 System.Windows.Forms/DataGridViewTextBoxCellTest.cs

diff --git a/mcs/class/Managed.Windows.Forms/Test/System.Windows.Forms/DataGridViewRowHeightInfoNeededEventArgsTests.cs b/mcs/class/Managed.Windows.Forms/Test/System.Windows.Forms/DataGridViewRowHeightInfoNeededEventArgsTests.cs
new file mode 100644 (file)
index 0000000..64c2866
--- /dev/null
+++ b/mcs/class/Managed.Windows.Forms/Test/System.Windows.Forms/DataGridViewRowHeightInfoNeededEventArgsTests.cs
@@ -0,0 +1,101 @@
+// Copyright (c) 2014 SIL International
+// This software is licensed under the MIT License (http://opensource.org/licenses/MIT)
+using System;
+using System.Windows.Forms;
+using NUnit.Framework;
+using CategoryAttribute = NUnit.Framework.CategoryAttribute;
+
+namespace MonoTests.System.Windows.Forms
+{
+       [TestFixture]
+       public class DataGridViewRowHeightInfoNeededEventArgsTests
+       {
+               struct RowInfo
+               {
+                       public RowInfo (DataGridViewRowHeightInfoNeededEventArgs e)
+                       {
+                               Height = e.Height;
+                               MinimumHeight = e.MinimumHeight;
+                       }
+
+                       public int Height;
+                       public int MinimumHeight;
+               }
+
+               class DummyDataGridView : DataGridView
+               {
+                       public RowInfo RowInfo;
+
+                       protected override void OnRowHeightInfoNeeded (DataGridViewRowHeightInfoNeededEventArgs e)
+                       {
+                               base.OnRowHeightInfoNeeded (e);
+                               RowInfo = new RowInfo (e);
+                       }
+               }
+
+               [Test]
+               [Category("NotWorking")]
+               public void HeightCantBeLessThanCurrentMinimumHeight ()
+               {
+                       using (var dgv = new DummyDataGridView ()) {
+                               // Setup
+                               dgv.VirtualMode = true;
+                               dgv.RowCount = 1;
+                               dgv.Rows [0].MinimumHeight = 5;
+                               dgv.Rows [0].Height = 10;
+                               dgv.RowHeightInfoNeeded += (sender, e) => {
+                                       e.Height = 2;
+                                       e.MinimumHeight = 2;
+                               };
+                               dgv.UpdateRowHeightInfo (0, false);
+
+                               // Execute - this triggers the RowHeightInfoNeeded event
+                               // This test doesn't work because of different implementation details in .NET
+                               // and Mono: on .NET RowHeightInfoNeeded gets called for the first time when
+                               // executing the following line. In Mono RowHeightInfoNeeded got already called
+                               // while executing dgv.UpdateRowHeightInfo. This means that when RowHeightInfoNeeded
+                               // gets called now MinimumHeight is already set to 2, allowing Height to become
+                               // 2 as well.
+                               // On .NET since it is the first time Height will be set to 5 (the current
+                               // MinimumHeight value).
+                               // The .NET behaviour is surprising since the order of setting the information
+                               // in RowHeightInfoNeeded shouldn't matter, therefore I don't think it's worth
+                               // changing the behaviour in Mono. Even more so since there is an easy
+                               // workaround: simply swapping the two lines in the RowHeighInfoNeeded event
+                               // handler works around the problem.
+                               var dummy = dgv.Rows [0].Height;
+
+                               // Verify
+                               var rowHeightInfo = dgv.RowInfo;
+                               Assert.AreEqual (5, rowHeightInfo.Height, "#A1"); // 5 because of buggy .NET behaviour
+                               Assert.AreEqual (2, rowHeightInfo.MinimumHeight, "#A2");
+                       }
+               }
+
+               [Test]
+               public void SettingHeightAfterChangingMinimumHeight ()
+               {
+                       using (var dgv = new DummyDataGridView ()) {
+                               // Setup
+                               dgv.VirtualMode = true;
+                               dgv.RowCount = 1;
+                               dgv.Rows [0].MinimumHeight = 5;
+                               dgv.Rows [0].Height = 10;
+                               dgv.RowHeightInfoNeeded += (sender, e) => {
+                                       e.MinimumHeight = 2;
+                                       e.Height = 2;
+                               };
+                               dgv.UpdateRowHeightInfo (0, false);
+
+                               // Execute - this triggers the RowHeightInfoNeeded event
+                               var dummy = dgv.Rows [0].Height;
+
+                               // Verify
+                               var rowHeightInfo = dgv.RowInfo;
+                               Assert.AreEqual (2, rowHeightInfo.Height, "#B1");
+                               Assert.AreEqual (2, rowHeightInfo.MinimumHeight, "#B2");
+                       }
+               }
+       }
+}
+