Added tests to check simple, container-like constraints for some elements

QuestPDF.UnitTests/AlignmentTests.cs

@@ -9,6 +9,8 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class AlignmentTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Alignment>();
         [Test]
         public void Draw_HorizontalCenter_VerticalCenter()
         {

QuestPDF.UnitTests/BackgroundTests.cs

@@ -9,6 +9,9 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class BackgroundTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Background>();
+        
         [Test]
         public void Draw_ShouldHandleNullChild()
         {

QuestPDF.UnitTests/BorderTests.cs

@@ -10,6 +10,9 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class BorderTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Border>();
+        
         [Test]
         public void ComponentShouldNotAffectLayout()
         {

QuestPDF.UnitTests/BoxTests.cs

@@ -9,6 +9,9 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class BoxTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Box>();
+        
         [Test]
         public void Draw_Wrap()
         {

QuestPDF.UnitTests/EnsureSpaceTests.cs

@@ -78,5 +78,8 @@ namespace QuestPDF.UnitTests
                 .ExpectChildMeasure(new Size(400, 300), new FullRender(300, 250))
                 .CheckMeasureResult(new FullRender(300, 250));
         }
+        
+        [Test]
+        public void Draw() => SimpleContainerTests.Draw<EnsureSpace>();
     }
 }

QuestPDF.UnitTests/ExtendTests.cs

@@ -81,5 +81,8 @@ namespace QuestPDF.UnitTests
                 .ExpectChildMeasure(new Size(400, 200), new FullRender(100, 100))
                 .CheckMeasureResult(new FullRender(100, 200));
         }
+
+        [Test]
+        public void Draw() => SimpleContainerTests.Draw<Extend>();
     }
 }

QuestPDF.UnitTests/QuestPDF.UnitTests.csproj

@@ -6,7 +6,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="FluentAssertions" Version="6.1.0" />
+        <PackageReference Include="FluentAssertions" Version="5.10.3" />
         <PackageReference Include="Moq" Version="4.13.1" />
         <PackageReference Include="nunit" Version="3.13.2" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />

QuestPDF.UnitTests/RotateTests.cs

@@ -9,6 +9,9 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class RotateTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Rotate>();
+
         [Test]
         public void Draw()
         {

QuestPDF.UnitTests/ShowEntireTests.cs

@@ -47,5 +47,8 @@ namespace QuestPDF.UnitTests
                 .ExpectChildMeasure(new Size(400, 300), new FullRender(300, 200))
                 .CheckMeasureResult(new FullRender(300, 200));
         }
+        
+        [Test]
+        public void Draw() => SimpleContainerTests.Draw<ShowEntire>();
     }
 }

QuestPDF.UnitTests/ShowOnceTest.cs

@@ -11,27 +11,7 @@ namespace QuestPDF.UnitTests
     public class ShowOnceTest
     {
         [Test]
-        public void ShouldRenderOnce_WhenRenderingCalledMultipleTimes()
-        {
-            var child = new Mock<Element>();
-            
-            child
-                .Setup(x => x.Measure(It.IsAny<Size>()))
-                .Returns(() => new FullRender(Size.Zero));
-
-            var element = new ShowOnce()
-            {
-                Child = child.Object
-            };
-
-            element.Draw(Size.Zero);
-            element.Draw(Size.Zero);
-            
-            child.Verify(x => x.Draw(It.IsAny<Size>()), Times.Once);
-        }
-        
-        [Test]
-        public void Draw_HorizontalRight_VerticalTop()
+        public void Draw()
         {
             TestPlan
                 .For(x => new ShowOnce()

QuestPDF.UnitTests/TestEngine/SimpleContainerTests.cs

@@ -0,0 +1,68 @@
+using QuestPDF.Drawing.SpacePlan;
+using QuestPDF.Elements;
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.UnitTests.TestEngine
+{
+    internal static class SimpleContainerTests
+    {
+        #region measure
+        
+        public static void Measure<TElement>() where TElement : Element, IContainer, new()
+        {
+            Measure_Wrap<TElement>();
+            Measure_PartialRender<TElement>();
+            Measure_FullRender<TElement>();
+        }
+        
+        private static void Measure_Wrap<TElement>() where TElement : Element, IContainer, new()
+        {
+            TestPlan
+                .For(x => new TElement
+                {
+                    Child = x.CreateChild()
+                })
+                .MeasureElement(new Size(400, 300))
+                .ExpectChildMeasure(new Size(400, 300), new Wrap())
+                .CheckMeasureResult(new Wrap());
+        }
+        
+        private static void Measure_PartialRender<TElement>() where TElement : Element, IContainer, new()
+        {
+            TestPlan
+                .For(x => new TElement
+                {
+                    Child = x.CreateChild()
+                })
+                .MeasureElement(new Size(400, 300))
+                .ExpectChildMeasure(new Size(400, 300), new PartialRender(200, 100))
+                .CheckMeasureResult(new PartialRender(200, 100));
+        }
+        
+        private static void Measure_FullRender<TElement>() where TElement : Element, IContainer, new()
+        {
+            TestPlan
+                .For(x => new TElement
+                {
+                    Child = x.CreateChild()
+                })
+                .MeasureElement(new Size(400, 300))
+                .ExpectChildMeasure(new Size(400, 300), new FullRender(250, 150))
+                .CheckMeasureResult(new FullRender(250, 150));
+        }
+        
+        #endregion
+        
+        public static void Draw<TElement>() where TElement : Element, IContainer, new()
+        {
+            TestPlan
+                .For(x => new TElement
+                {
+                    Child = x.CreateChild()
+                })
+                .DrawElement(new Size(1200, 900))
+                .ExpectChildDraw(new Size(1200, 900))
+                .CheckDrawResult();
+        }
+    }
+}

QuestPDF.UnitTests/TranslateTests.cs

@@ -9,6 +9,9 @@ namespace QuestPDF.UnitTests
     [TestFixture]
     public class TranslateTests
     {
+        [Test]
+        public void Measure() => SimpleContainerTests.Measure<Translate>();
+        
         [Test]
         public void Draw()
         {