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Add code coverage for DataGridViewImageCell (#13616)
* Add code coverage for DataGridViewImageCell
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‎src/test/unit/System.Windows.Forms/System/Windows/Forms/DataGridViewImageCellTests.cs‎

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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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using System.Drawing;
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namespace System.Windows.Forms.Tests;
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public class DataGridViewImageCellTests : IDisposable
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{
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private readonly DataGridViewImageCell _dataGridViewImageCell;
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public DataGridViewImageCellTests() => _dataGridViewImageCell = new();
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public void Dispose() => _dataGridViewImageCell.Dispose();
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[Fact]
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public void Ctor_Default_SetsValueIsIconFalse() =>
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_dataGridViewImageCell.ValueIsIcon.Should().BeFalse();
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[WinFormsTheory]
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[BoolData]
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public void Ctor_ValueIsIcon_SetsValueIsIcon(bool valueIsIcon)
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{
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using DataGridViewImageCell dataGridViewImageCell = new(valueIsIcon);
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dataGridViewImageCell.ValueIsIcon.Should().Be(valueIsIcon);
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}
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[Fact]
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public void DefaultNewRowValue_ReturnsErrorBitmap_WhenValueTypeIsImage()
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{
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_dataGridViewImageCell.ValueType = typeof(Image);
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var value = _dataGridViewImageCell.DefaultNewRowValue;
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value.Should().BeSameAs(DataGridViewImageCell.ErrorBitmap);
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}
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[WinFormsFact]
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public void DefaultNewRowValue_ReturnsNull_WhenValueTypeIsOther()
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{
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_dataGridViewImageCell.ValueType = typeof(string);
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_dataGridViewImageCell.ValueIsIcon = false;
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object? value = _dataGridViewImageCell.DefaultNewRowValue;
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value.Should().BeNull();
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}
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[Fact]
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public void EditType_IsAlwaysNull()
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{
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_dataGridViewImageCell.EditType.Should().BeNull();
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using DataGridViewImageCell dataGridViewImageCellIcon = new(true);
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dataGridViewImageCellIcon.EditType.Should().BeNull();
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}
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[WinFormsFact]
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public void FormattedValueType_ReturnsImage_WhenValueIsIconFalse()
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{
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_dataGridViewImageCell.ValueIsIcon = false;
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_dataGridViewImageCell.FormattedValueType.Should().Be(typeof(Image));
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}
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[WinFormsFact]
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public void ValueIsIcon_SetFalse_UpdatesFlag()
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{
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_dataGridViewImageCell.ValueIsIcon = true;
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_dataGridViewImageCell.ValueIsIcon = false;
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_dataGridViewImageCell.ValueIsIcon.Should().BeFalse();
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}
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[Fact]
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public void ValueType_GetSet_RoundTrips()
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{
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_dataGridViewImageCell.ValueType = typeof(Image);
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_dataGridViewImageCell.ValueType.Should().Be(typeof(Image));
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_dataGridViewImageCell.ValueType = null;
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_dataGridViewImageCell.ValueType.Should().Be(typeof(Image));
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_dataGridViewImageCell.ValueIsIcon = true;
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_dataGridViewImageCell.ValueType.Should().Be(typeof(Icon));
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}
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[Fact]
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public void ValueType_SetToNull_ResetsValueIsIconToDefault()
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{
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_dataGridViewImageCell.ValueType = typeof(Icon);
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_dataGridViewImageCell.ValueIsIcon.Should().BeTrue();
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_dataGridViewImageCell.ValueType = null;
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_dataGridViewImageCell.ValueIsIcon.Should().BeFalse();
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}
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[Fact]
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public void GetContentBounds_ReturnsEmpty_WhenDataGridViewIsNull()
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{
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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_dataGridViewImageCell.DataGridView = null;
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetContentBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetContentBounds_ReturnsEmpty_WhenRowIndexNegative()
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{
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using DataGridView dataGridView = new();
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_dataGridViewImageCell.DataGridView = dataGridView;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetContentBounds(g, dataGridViewCellStyle, -1);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetContentBounds_ReturnsEmpty_WhenOwningColumnIsNull()
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{
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using DataGridView dataGridView = new();
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dataGridView.Columns.Add(new DataGridViewImageColumn());
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dataGridView.Rows.Add();
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_dataGridViewImageCell.DataGridView = dataGridView;
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_dataGridViewImageCell.OwningColumn = null;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetContentBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[Fact]
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public void GetErrorIconBounds_ReturnsEmpty_WhenDataGridViewIsNull()
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{
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetErrorIconBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetErrorIconBounds_ReturnsEmpty_WhenRowIndexNegative()
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{
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using DataGridView dataGridView = new();
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dataGridView.Columns.Add(new DataGridViewImageColumn());
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dataGridView.Rows.Add();
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_dataGridViewImageCell.DataGridView = dataGridView;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetErrorIconBounds(g, dataGridViewCellStyle, -1);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetErrorIconBounds_ReturnsEmpty_WhenOwningColumnIsNull()
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{
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using DataGridView dataGridView = new();
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dataGridView.Columns.Add(new DataGridViewImageColumn());
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dataGridView.Rows.Add();
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_dataGridViewImageCell.DataGridView = dataGridView;
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_dataGridViewImageCell.OwningColumn = null;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetErrorIconBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetErrorIconBounds_ReturnsEmpty_WhenShowCellErrorsIsFalse()
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{
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using DataGridView dataGridView = new();
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using DataGridViewImageColumn dataGridViewImageColumn = new();
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dataGridView.Columns.Add(dataGridViewImageColumn);
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dataGridView.Rows.Add();
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dataGridView.ShowCellErrors = false;
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_dataGridViewImageCell.DataGridView = dataGridView;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetErrorIconBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[WinFormsFact]
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public void GetErrorIconBounds_ReturnsEmpty_WhenErrorTextIsNullOrEmpty()
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{
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using DataGridView dataGridView = new();
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using DataGridViewImageColumn dataGridViewImageColumn = new();
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dataGridView.Columns.Add(dataGridViewImageColumn);
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dataGridView.Rows.Add();
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dataGridView.ShowCellErrors = true;
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_dataGridViewImageCell.DataGridView = dataGridView;
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_dataGridViewImageCell.ErrorText = null;
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_dataGridViewImageCell.OwningColumn = null;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Rectangle bounds = (Rectangle)_dataGridViewImageCell.TestAccessor().Dynamic.GetErrorIconBounds(g, dataGridViewCellStyle, 0);
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bounds.Should().Be(Rectangle.Empty);
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}
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[Fact]
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public void GetPreferredSize_ReturnsMinusOne_WhenDataGridViewIsNull()
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{
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using DataGridViewImageCell dataGridViewImageCell = _dataGridViewImageCell;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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Size size = (Size)dataGridViewImageCell.TestAccessor().Dynamic.GetPreferredSize(g, dataGridViewCellStyle, 0, new Size(100, 100));
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size.Should().Be(new Size(-1, -1));
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}
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[Fact]
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public void GetPreferredSize_ThrowsNullReferenceException_WhenCellStyleIsNull()
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{
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using DataGridViewImageCell dataGridViewImageCell = _dataGridViewImageCell;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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Action action = () => dataGridViewImageCell.TestAccessor().Dynamic.GetPreferredSize(g, null, 0, new Size(100, 100));
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action.Should().Throw<NullReferenceException>();
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}
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[WinFormsFact]
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public void Paint_DoesNotThrow_WithValidArguments_UsingTestAccessor()
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{
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using DataGridView dataGridView = new();
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using DataGridViewImageColumn dataGridViewImageColumn = new();
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dataGridView.Columns.Add(dataGridViewImageColumn);
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dataGridView.Rows.Add();
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using DataGridViewImageCell dataGridViewImageCell = _dataGridViewImageCell;
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dataGridView.Rows[0].Cells[0] = dataGridViewImageCell;
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using Graphics g = Graphics.FromImage(new Bitmap(10, 10));
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DataGridViewCellStyle dataGridViewCellStyle = new();
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DataGridViewAdvancedBorderStyle borderStyle = new();
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Action action = () => dataGridViewImageCell.TestAccessor().Dynamic.Paint(
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g,
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new Rectangle(0, 0, 10, 10),
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new Rectangle(0, 0, 10, 10),
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0,
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DataGridViewElementStates.None,
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null,
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null,
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null,
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dataGridViewCellStyle,
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borderStyle,
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DataGridViewPaintParts.All);
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action.Should().NotThrow();
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}
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[WinFormsFact]
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public void ColumnIndex_ReturnsExpectedFormat()
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{
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using DataGridView dataGridView = new();
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dataGridView.Columns.Add(new DataGridViewImageColumn());
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dataGridView.Rows.Add();
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using DataGridViewImageCell dataGridViewImageCell = _dataGridViewImageCell;
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dataGridView.Rows[0].Cells[0] = dataGridViewImageCell;
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dataGridViewImageCell.ColumnIndex.Should().Be(0);
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}
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}

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