chore: Real life scenario tests

Author: swagfin

ObjectSemantics.NET.Tests/MoqModels/OrderEmailModel.cs

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+using System;
+using System.Collections.Generic;
+
+namespace ObjectSemantics.NET.Tests.MoqModels
+{
+    public class OrderEmailModel
+    {
+        public string OrderNo { get; set; }
+        public DateTime OrderDate { get; set; }
+        public decimal Subtotal { get; set; }
+        public decimal Tax { get; set; }
+        public decimal Total { get; set; }
+        public bool IsPaid { get; set; }
+        public OrderCustomer Customer { get; set; }
+        public List<OrderLineItem> Items { get; set; } = new List<OrderLineItem>();
+    }
+
+    public class OrderCustomer
+    {
+        public string FullName { get; set; }
+        public string Email { get; set; }
+        public OrderAddress BillingAddress { get; set; }
+    }
+
+    public class OrderAddress
+    {
+        public string Line1 { get; set; }
+        public string City { get; set; }
+        public string Country { get; set; }
+    }
+
+    public class OrderLineItem
+    {
+        public string Name { get; set; }
+        public int Quantity { get; set; }
+        public decimal UnitPrice { get; set; }
+        public decimal LineTotal { get; set; }
+    }
+}

ObjectSemantics.NET.Tests/RealLifeTemplateScenarioTests.cs

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+using ObjectSemantics.NET.Tests.MoqModels;
+using System;
+using System.Collections.Generic;
+using Xunit;
+
+namespace ObjectSemantics.NET.Tests
+{
+    public class RealLifeTemplateScenarioTests
+    {
+        [Fact]
+        public void Should_Render_Order_Confirmation_Email_With_Mixed_Features()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                OrderNo = "ORD-1001",
+                OrderDate = new DateTime(2026, 03, 06, 9, 30, 0),
+                Subtotal = 2500,
+                Tax = 400,
+                Total = 2900,
+                IsPaid = true,
+                Customer = new OrderCustomer
+                {
+                    FullName = "jane doe",
+                    BillingAddress = new OrderAddress
+                    {
+                        Line1 = "12 River Road",
+                        City = "Nairobi",
+                        Country = "Kenya"
+                    }
+                },
+                Items = new List<OrderLineItem>
+                {
+                    new OrderLineItem { Name = "Keyboard", Quantity = 1, UnitPrice = 1200, LineTotal = 1200 },
+                    new OrderLineItem { Name = "Mouse", Quantity = 2, UnitPrice = 650, LineTotal = 1300 }
+                }
+            };
+
+            var extra = new Dictionary<string, object>
+            {
+                ["SupportEmail"] = "support@crudsoft.com"
+            };
+
+            string template = "Order {{ OrderNo }}|Date {{ OrderDate:yyyy-MM-dd }}|Customer {{ Customer.FullName:titlecase }}|{{ #if(IsPaid == true) }}PAID{{ #else }}UNPAID{{ #endif }}|Items {{ #foreach(Items) }}[{{ Quantity }}x{{ Name }}={{ LineTotal:N2 }}]{{ #endforeach }}|Ship {{ Customer.BillingAddress.City }},{{ Customer.BillingAddress.Country }}|Total {{ Total:N2 }}|Support {{ SupportEmail }}";
+
+            string result = order.Map(template, extra);
+            string expected = "Order ORD-1001|Date 2026-03-06|Customer Jane Doe|PAID|Items [1xKeyboard=1,200.00][2xMouse=1,300.00]|Ship Nairobi,Kenya|Total 2,900.00|Support support@crudsoft.com";
+
+            Assert.Equal(expected, result);
+        }
+
+        [Fact]
+        public void Should_Evaluate_Nested_If_Condition_For_Message_Routing()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                Customer = new OrderCustomer
+                {
+                    BillingAddress = new OrderAddress
+                    {
+                        Country = "Kenya"
+                    }
+                }
+            };
+
+            string template = "{{ #if(Customer.BillingAddress.Country == Kenya) }}LOCAL{{ #else }}INTERNATIONAL{{ #endif }}";
+            string result = order.Map(template);
+
+            Assert.Equal("LOCAL", result);
+        }
+
+        [Fact]
+        public void Should_Fallback_To_Else_When_Intermediate_Nested_Object_Is_Null()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                Customer = new OrderCustomer
+                {
+                    BillingAddress = null
+                }
+            };
+
+            string template = "{{ #if(Customer.BillingAddress.Country == Kenya) }}LOCAL{{ #else }}INTERNATIONAL{{ #endif }}";
+            string result = order.Map(template);
+
+            Assert.Equal("INTERNATIONAL", result);
+        }
+
+        [Fact]
+        public void Should_Map_Additional_Parameters_With_Dot_Notation()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                OrderNo = "ORD-9999"
+            };
+
+            var extra = new Dictionary<string, object>
+            {
+                ["Meta.UnsubscribeUrl"] = "https://example.com/unsub/abc123",
+                ["Meta.Channel"] = "EMAIL"
+            };
+
+            string template = "Order {{ OrderNo }} via {{ Meta.Channel }}; Unsubscribe: {{ Meta.UnsubscribeUrl }}";
+            string result = order.Map(template, extra);
+
+            Assert.Equal("Order ORD-9999 via EMAIL; Unsubscribe: https://example.com/unsub/abc123", result);
+        }
+
+        [Fact]
+        public void Should_Escape_Xml_In_Nested_And_Additional_Values_For_Email()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                Customer = new OrderCustomer
+                {
+                    FullName = "Tom & Jerry <Ltd>"
+                }
+            };
+
+            var extra = new Dictionary<string, object>
+            {
+                ["SupportLink"] = "<a href='https://example.com/help'>Help</a>"
+            };
+
+            string template = "{{ Customer.FullName }}|{{ SupportLink }}";
+            string result = order.Map(template, extra, new TemplateMapperOptions
+            {
+                XmlCharEscaping = true
+            });
+
+            Assert.Equal("Tom &amp; Jerry &lt;Ltd&gt;|&lt;a href=&apos;https://example.com/help&apos;&gt;Help&lt;/a&gt;", result);
+        }
+
+        [Fact]
+        public void Should_Remain_Deterministic_Across_Repeated_Message_Mapping()
+        {
+            string template = "Hello {{ Customer.FullName }} - {{ OrderNo }}";
+
+            for (int i = 1; i <= 200; i++)
+            {
+                OrderEmailModel order = new OrderEmailModel
+                {
+                    OrderNo = "ORD-" + i.ToString("000", System.Globalization.CultureInfo.InvariantCulture),
+                    Customer = new OrderCustomer
+                    {
+                        FullName = "Customer " + i.ToString(System.Globalization.CultureInfo.InvariantCulture)
+                    }
+                };
+
+                string result = order.Map(template);
+                string expected = "Hello Customer " + i.ToString(System.Globalization.CultureInfo.InvariantCulture) + " - ORD-" + i.ToString("000", System.Globalization.CultureInfo.InvariantCulture);
+
+                Assert.Equal(expected, result);
+            }
+        }
+    }
+}