chore: more real-life unit tests scenarios

Author: swagfin

ObjectSemantics.NET.Tests/PromotionAndMessagingTemplateTests.cs

@@ -0,0 +1,100 @@
+using ObjectSemantics.NET.Tests.MoqModels;
+using System.Collections.Generic;
+using System.Globalization;
+using Xunit;
+
+namespace ObjectSemantics.NET.Tests
+{
+    public class PromotionAndMessagingTemplateTests
+    {
+        [Theory]
+        [InlineData("A", "Special offer for Jane Doe")]
+        [InlineData("B", "Do not miss out Jane Doe")]
+        public void Should_Render_Ab_Test_Subject_Line(string campaignVariant, string expected)
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                Customer = new OrderCustomer
+                {
+                    FullName = "jane doe"
+                }
+            };
+
+            var extra = new Dictionary<string, object>
+            {
+                ["CampaignVariant"] = campaignVariant
+            };
+
+            string template = "{{ #if(CampaignVariant == A) }}Special offer for {{ Customer.FullName:titlecase }}{{ #else }}Do not miss out {{ Customer.FullName:titlecase }}{{ #endif }}";
+            string result = order.Map(template, extra);
+
+            Assert.Equal(expected, result);
+        }
+
+        [Fact]
+        public void Should_Use_Generic_Greeting_When_Personalized_Name_Is_Null()
+        {
+            OrderEmailModel order = new OrderEmailModel
+            {
+                Customer = new OrderCustomer
+                {
+                    FullName = null
+                }
+            };
+
+            string template = "{{ #if(Customer.FullName == null) }}Hello Customer{{ #else }}Hello {{ Customer.FullName:titlecase }}{{ #endif }}";
+            string result = order.Map(template);
+
+            Assert.Equal("Hello Customer", result);
+        }
+
+        [Theory]
+        [InlineData("EMAIL", "Compliance: Unsubscribe via https://example.com/unsub/u-100")]
+        [InlineData("SMS", "Compliance: Reply STOP to unsubscribe")]
+        public void Should_Render_Channel_Specific_Compliance_Block(string channel, string expected)
+        {
+            OrderEmailModel order = new OrderEmailModel();
+            var extra = new Dictionary<string, object>
+            {
+                ["Meta.Channel"] = channel,
+                ["Meta.UnsubscribeUrl"] = "https://example.com/unsub/u-100"
+            };
+
+            string template = "Compliance: {{ #if(Meta.Channel == EMAIL) }}Unsubscribe via {{ Meta.UnsubscribeUrl }}{{ #else }}Reply STOP to unsubscribe{{ #endif }}";
+            string result = order.Map(template, extra);
+
+            Assert.Equal(expected, result);
+        }
+
+        [Fact]
+        public void Should_Map_Bulk_Message_Batch_Deterministically()
+        {
+            string template = "{{ #if(CampaignVariant == A) }}[A]{{ #else }}[B]{{ #endif }} {{ #if(Customer.FullName == null) }}Hello Customer{{ #else }}Hello {{ Customer.FullName:titlecase }}{{ #endif }} - {{ OrderNo }}";
+
+            for (int i = 1; i <= 250; i++)
+            {
+                OrderEmailModel order = new OrderEmailModel
+                {
+                    OrderNo = "ORD-" + i.ToString("000", CultureInfo.InvariantCulture),
+                    Customer = new OrderCustomer
+                    {
+                        FullName = i % 5 == 0 ? null : "customer " + i.ToString(CultureInfo.InvariantCulture)
+                    }
+                };
+
+                var extra = new Dictionary<string, object>
+                {
+                    ["CampaignVariant"] = i % 2 == 0 ? "A" : "B"
+                };
+
+                string result = order.Map(template, extra);
+                string expectedPrefix = i % 2 == 0 ? "[A]" : "[B]";
+                string expectedName = i % 5 == 0 ? "Hello Customer" : "Hello Customer " + i.ToString(CultureInfo.InvariantCulture);
+                string expected = expectedPrefix + " " + expectedName + " - ORD-" + i.ToString("000", CultureInfo.InvariantCulture);
+
+                Assert.Equal(expected, result);
+                Assert.DoesNotContain("{{", result);
+            }
+        }
+    }
+}