EFcoreExtension

QWERTYkez.Mensura.Tests/TestEntity.cs

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+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+
+namespace QWERTYkez.Mensura.Tests
+{
+    public class TestEntity1
+    {
+        public int Id { get; set; }
+        public Length Length { get; set; }
+    }
+
+    public class TestEntity2
+    {
+        public int Id { get; set; }
+        public double Length { get; set; }
+    }
+
+    public class SharedDbContext(DbContextOptions<SharedDbContext> options) : DbContext(options)
+    {
+        public DbSet<TestEntity1> Entities1 { get; set; }
+        public DbSet<TestEntity2> Entities2 { get; set; }
+
+        protected override void ConfigureConventions(ModelConfigurationBuilder configurationBuilder)
+        {
+            configurationBuilder.UseMensuraUnits();
+        }
+    }
+
+    public class IdentityConversionTest : IDisposable
+    {
+        private readonly SqliteConnection _connection;
+
+        public IdentityConversionTest()
+        {
+            _connection = new SqliteConnection("Filename=:memory:");
+            _connection.Open();
+        }
+
+        public void Dispose()
+        {
+            _connection?.Dispose();
+            GC.SuppressFinalize(this);
+        }
+
+        [Fact]
+        public void Length_And_Double_Are_Stored_Identically()
+        {
+            // 1. Сохраняем Length → читаем как double
+            double savedDoubleFromLength;
+            using (var context = new SharedDbContext(new DbContextOptionsBuilder<SharedDbContext>().UseSqlite(_connection).Options))
+            {
+                context.Database.EnsureCreated();
+                var expectedLength = Length.Meter; // 1000 мм
+                context.Entities1.Add(new TestEntity1 { Length = expectedLength });
+                context.SaveChanges();
+
+                using var cmd = context.Database.GetDbConnection().CreateCommand();
+                cmd.CommandText = "SELECT Length FROM Entities1";
+                savedDoubleFromLength = (double)cmd.ExecuteScalar()!;
+            }
+
+            // 2. Сохраняем double → читаем как Length
+            double savedDoubleFromDouble = 1234.5;
+            using (var context = new SharedDbContext(new DbContextOptionsBuilder<SharedDbContext>().UseSqlite(_connection).Options))
+            {
+                context.Database.EnsureCreated();
+                context.Entities2.Add(new TestEntity2 { Length = savedDoubleFromDouble });
+                context.SaveChanges();
+
+                using var cmd = context.Database.GetDbConnection().CreateCommand();
+                cmd.CommandText = "SELECT Length FROM Entities2";
+                savedDoubleFromDouble = (double)cmd.ExecuteScalar()!; // должно быть 1234.5
+            }
+
+            // 3. Проверяем, что сырые значения сохранены корректно
+            Assert.Equal(1000.0, savedDoubleFromLength);
+            Assert.Equal(1234.5, savedDoubleFromDouble);
+
+            // 4. Проверяем обратимость: читаем из Entities1 как TestEntity2
+            using (var context = new SharedDbContext(new DbContextOptionsBuilder<SharedDbContext>().UseSqlite(_connection).Options))
+            {
+                var fromLengthTable = context.Entities2
+                    .FromSqlRaw("SELECT Id, Length FROM Entities1")
+                    .First();
+                Assert.Equal(1000.0, fromLengthTable.Length);
+            }
+
+            // 5. Проверяем обратимость: читаем из Entities2 как TestEntity1
+            using (var context = new SharedDbContext(new DbContextOptionsBuilder<SharedDbContext>().UseSqlite(_connection).Options))
+            {
+                var fromDoubleTable = context.Entities1
+                    .FromSqlRaw("SELECT Id, Length FROM Entities2")
+                    .First();
+                Assert.Equal(1234.5, (double)fromDoubleTable.Length);
+            }
+        }
+    }
+}