[dotnet] Enhance Print PageSize class to support for predefined well-known sizes (SeleniumHQ#15144)

Author: yvsvarma

dotnet/src/webdriver/PrintOptions.cs

@@ -259,6 +259,30 @@ public class PageSize
             private double height = DefaultPageHeight;
             private double width = DefaultPageWidth;
 
+            /// <summary>
+            /// Represents the A4 paper size.
+            /// Width: 21.0 cm, Height: 29.7 cm
+            /// </summary>
+            public static PageSize A4 => new PageSize { Width = 21.0, Height = 29.7 }; // cm
+
+            /// <summary>
+            /// Represents the Legal paper size.
+            /// Width: 21.59 cm, Height: 35.56 cm
+            /// </summary>
+            public static PageSize Legal => new PageSize { Width = 21.59, Height = 35.56 }; // cm
+
+            /// <summary>
+            /// Represents the Letter paper size.
+            /// Width: 21.59 cm, Height: 27.94 cm
+            /// </summary>
+            public static PageSize Letter => new PageSize { Width = 21.59, Height = 27.94 }; // cm
+
+            /// <summary>
+            /// Represents the Tabloid paper size.
+            /// Width: 27.94 cm, Height: 43.18 cm
+            /// </summary>
+            public static PageSize Tabloid => new PageSize { Width = 27.94, Height = 43.18 }; // cm
+
             /// <summary>
             /// Gets or sets the height of each page in centimeters.
             /// </summary>

dotnet/test/common/PrintTest.cs

@@ -122,5 +122,40 @@ public void MarginsCannotHaveNegativeValues()
             Assert.That(() => new PrintOptions.Margins { Left = -1 }, Throws.TypeOf<ArgumentOutOfRangeException>());
             Assert.That(() => new PrintOptions.Margins { Right = -1 }, Throws.TypeOf<ArgumentOutOfRangeException>());
         }
+
+        [Test]
+        public void CanSetPredefinedPageSizes()
+        {
+            var options = new PrintOptions();
+
+            options.PageDimensions = PrintOptions.PageSize.A4;
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.PageSize.A4.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.PageSize.A4.Height));
+
+            options.PageDimensions = PrintOptions.PageSize.Legal;
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.PageSize.Legal.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.PageSize.Legal.Height));
+
+            options.PageDimensions = PrintOptions.PageSize.Letter;
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.PageSize.Letter.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.PageSize.Letter.Height));
+
+            options.PageDimensions = PrintOptions.PageSize.Tabloid;
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(PrintOptions.PageSize.Tabloid.Width));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(PrintOptions.PageSize.Tabloid.Height));
+        }
+
+        [Test]
+        public void CanSetCustomPageSize()
+        {
+            var options = new PrintOptions();
+            var customPageSize = new PrintOptions.PageSize { Width = 25.0, Height = 30.0 };
+
+            options.PageDimensions = customPageSize;
+
+            Assert.That(options.PageDimensions.Width, Is.EqualTo(25.0));
+            Assert.That(options.PageDimensions.Height, Is.EqualTo(30.0));
+        }
+
     }
 }