Some Northwind properties need their MAxLength defined

test/EFCore.Jet.FunctionalTests/Query/NorthwindQueryJetFixture.cs

@@ -18,9 +18,14 @@ namespace EntityFrameworkCore.Jet.FunctionalTests.Query
         {
             base.OnModelCreating(modelBuilder, context);
 
-            modelBuilder.Entity<Customer>()
-                .Property(c => c.CustomerID)
-                .HasColumnType("nchar(5)");
+            modelBuilder.Entity<Customer>(
+                b =>
+                {
+                    b.Property(c => c.CustomerID).HasColumnType("nchar(5)");
+                    b.Property(cm => cm.CompanyName).HasMaxLength(40);
+                    b.Property(cm => cm.ContactName).HasMaxLength(30);
+                    b.Property(cm => cm.ContactTitle).HasColumnType("NVarChar(30)");
+                });
 
             modelBuilder.Entity<Employee>(
                 b =>
@@ -45,6 +50,7 @@ namespace EntityFrameworkCore.Jet.FunctionalTests.Query
                 {
                     b.Property(p => p.UnitPrice).HasColumnType("money");
                     b.Property(p => p.UnitsInStock).HasColumnType("smallint");
+                    b.Property(cm => cm.ProductName).HasMaxLength(40);
                 });
 
             modelBuilder.Entity<MostExpensiveProduct>()