Add some tests

Src/Couchbase.Linq.IntegrationTests/QueryTests.cs

@@ -1436,6 +1436,58 @@ public void DateTimeOffset_DateTrunc()
             }
         }
 
+        [Test]
+        public void DateTime_Date()
+        {
+            var context = new BucketContext(TestSetup.Bucket);
+
+            var beers = from beer in context.Query<Beer>()
+                where beer.Type == "beer"
+                select new {beer.Name, Updated = beer.Updated.Date};
+
+            foreach (var b in beers.Take(1))
+            {
+                Console.WriteLine("Beer {0} is in {1:d}", b.Name, b.Updated);
+            }
+        }
+
+        [Test]
+        public async Task DateTime_Date_UnixMillis()
+        {
+            var context = new BucketContext(TestSetup.Bucket);
+
+            var versionProvider = TestSetup.Cluster.ClusterServices.GetRequiredService<IClusterVersionProvider>();
+            var clusterVersion = await versionProvider.GetVersionAsync() ?? FeatureVersions.DefaultVersion;
+            if (clusterVersion.Version == new Version(5, 5, 0))
+            {
+                Assert.Ignore("Skipping temporarily due to bug in 5.5 Beta https://issues.couchbase.com/browse/MB-29357");
+            }
+
+            var beers = from beer in context.Query<Beer>()
+                        where beer.Type == "beer" && N1QlFunctions.IsValued(beer.UpdatedUnixMillis)
+                        select new { beer.Name, Updated = beer.UpdatedUnixMillis.Value.Date };
+
+            foreach (var b in beers.Take(1))
+            {
+                Console.WriteLine("Beer {0} is in {1:d}", b.Name, b.Updated);
+            }
+        }
+
+        [Test]
+        public void DateTimeOffset_Date()
+        {
+            var context = new BucketContext(TestSetup.Bucket);
+
+            var beers = from beer in context.Query<Beer>()
+                where beer.Type == "beer"
+                select new {beer.Name, Updated = beer.UpdatedOffset.Date};
+
+            foreach (var b in beers.Take(1))
+            {
+                Console.WriteLine("Beer {0} is in {1:d}", b.Name, b.Updated);
+            }
+        }
+
         private async Task PrepareBeerDocuments()
         {
             var query = @"UPDATE `beer-sample` SET updatedUnixMillis = STR_TO_MILLIS(updated)

Src/Couchbase.Linq.UnitTests/QueryGeneration/MethodCallTranslators/DateMethodCallTranslatorTests.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+using System.Threading.Tasks;
+using Couchbase.Linq.QueryGeneration;
+using Couchbase.Linq.QueryGeneration.MethodCallTranslators;
+using Moq;
+using NUnit.Framework;
+using System.Reflection;
+using Couchbase.Core.IO.Serializers;
+
+namespace Couchbase.Linq.UnitTests.QueryGeneration.MethodCallTranslators
+{
+    class DateMethodCallTranslatorTests
+    {
+        #region Translate
+
+        [Test]
+        public void Translate_DateTime_Date_RendersCorrectly()
+        {
+            // Arrange
+
+            var queryGenerationContext = new N1QlQueryGenerationContext
+            {
+                Serializer = new DefaultSerializer()
+            };
+
+            var visitor = new Mock<N1QlExpressionTreeVisitor>(queryGenerationContext)
+            {
+                CallBase = true
+            };
+
+            var dateTime = new DateTime(2024, 01, 02, 3, 45, 10, DateTimeKind.Utc);
+
+            var method = typeof(DateTime).GetProperty("Date").GetGetMethod();
+            var expression = Expression.Call(Expression.Constant(dateTime), method);
+
+            var transformer = new DateMethodCallTranslator();
+
+            // Act
+
+            transformer.Translate(expression, visitor.Object);
+            var result = visitor.Object.GetN1QlExpression();
+
+            // Assert
+
+            Assert.AreEqual("DATE_TRUNC_STR(\"2024-01-02T03:45:10Z\",\"day\")", result);
+        }
+
+        [Test]
+        public void Translate_DateTimeOffset_Date_RendersCorrectly()
+        {
+            // Arrange
+
+            var queryGenerationContext = new N1QlQueryGenerationContext
+            {
+                Serializer = new DefaultSerializer()
+            };
+
+            var visitor = new Mock<N1QlExpressionTreeVisitor>(queryGenerationContext)
+            {
+                CallBase = true
+            };
+
+            var dateTime = new DateTimeOffset(2024, 01, 02, 3, 45, 10, TimeSpan.Zero);
+
+            var method = typeof(DateTimeOffset).GetProperty("Date").GetGetMethod();
+            var expression = Expression.Call(Expression.Constant(dateTime), method);
+
+            var transformer = new DateMethodCallTranslator();
+
+            // Act
+
+            transformer.Translate(expression, visitor.Object);
+            var result = visitor.Object.GetN1QlExpression();
+
+            // Assert
+
+            Assert.AreEqual("DATE_TRUNC_STR(\"2024-01-02T03:45:10+00:00\",\"day\")", result);
+        }
+
+        #endregion
+    }
+}