Tests fixed and some adaptions to C# 7... yeah, less code

src/Squidex.Core/Schemas/Validators/PatternValidator.cs

@@ -30,22 +30,18 @@ namespace Squidex.Core.Schemas.Validators
 
         public Task ValidateAsync(object value, ICollection<string> errors)
         {
-            var stringValue = value as string;
-
-            if (stringValue == null)
-            {
-                return TaskHelper.Done;
-            }
-
-            if (!regex.IsMatch(stringValue))
+            if (value is string stringValue)
             {
-                if (string.IsNullOrWhiteSpace(errorMessage))
-                {
-                    errors.Add("<FIELD> is not valid");
-                }
-                else
+                if (!regex.IsMatch(stringValue))
                 {
-                    errors.Add(errorMessage);
+                    if (string.IsNullOrWhiteSpace(errorMessage))
+                    {
+                        errors.Add("<FIELD> is not valid");
+                    }
+                    else
+                    {
+                        errors.Add(errorMessage);
+                    }
                 }
             }
 

src/Squidex.Core/Schemas/Validators/StringLengthValidator.cs

@@ -11,6 +11,8 @@ using System.Collections.Generic;
 using System.Threading.Tasks;
 using Squidex.Infrastructure.Tasks;
 
+// ReSharper disable InvertIf
+
 namespace Squidex.Core.Schemas.Validators
 {
     public class StringLengthValidator : IValidator
@@ -31,21 +33,17 @@ namespace Squidex.Core.Schemas.Validators
 
         public Task ValidateAsync(object value, ICollection<string> errors)
         {
-            var stringValue = value as string;
-
-            if (stringValue == null)
-            {
-                return TaskHelper.Done;
-            }
-
-            if (minLength.HasValue && stringValue.Length < minLength.Value)
-            {
-                errors.Add($"<FIELD> must have more than '{minLength}' characters");
-            }
-
-            if (maxLength.HasValue && stringValue.Length > maxLength.Value)
+            if (value is string stringValue)
             {
-                errors.Add($"<FIELD> must have less than '{maxLength}' characters");
+                if (minLength.HasValue && stringValue.Length < minLength.Value)
+                {
+                    errors.Add($"<FIELD> must have more than '{minLength}' characters");
+                }
+
+                if (maxLength.HasValue && stringValue.Length > maxLength.Value)
+                {
+                    errors.Add($"<FIELD> must have less than '{maxLength}' characters");
+                }
             }
 
             return TaskHelper.Done;

src/Squidex.Infrastructure/CQRS/Commands/EnrichWithTimestampHandler.cs

@@ -25,9 +25,7 @@ namespace Squidex.Infrastructure.CQRS.Commands
 
         public Task<bool> HandleAsync(CommandContext context)
         {
-            var timestampCommand = context.Command as ITimestampCommand;
-
-            if (timestampCommand != null)
+            if (context.Command is ITimestampCommand timestampCommand)
             {
                 timestampCommand.Timestamp = clock.GetCurrentInstant();
             }

src/Squidex.Infrastructure/Reflection/PropertyAccessor.cs

@@ -26,7 +26,7 @@ namespace Squidex.Infrastructure.Reflection
                 }
                 else
                 {
-                    getMethod = x => throw new NotSupportedException();
+                    getMethod = x => { throw new NotSupportedException(); };
                 }
 
                 if (propertyInfo.CanWrite)
@@ -35,7 +35,7 @@ namespace Squidex.Infrastructure.Reflection
                 }
                 else
                 {
-                    setMethod = (x, y) => throw new NotSupportedException();
+                    setMethod = (x, y) => { throw new NotSupportedException(); };
                 }
             }
 

src/Squidex.Read.MongoDb/Utils/EntityMapper.cs

@@ -58,9 +58,7 @@ namespace Squidex.Read.MongoDb.Utils
 
         private static void SetVersion(EnvelopeHeaders headers, MongoEntity entity)
         {
-            var withVersion = entity as IEntityWithVersion;
-
-            if (withVersion != null)
+            if (entity is IEntityWithVersion withVersion)
             {
                 withVersion.Version = headers.EventStreamNumber();
             }
@@ -68,9 +66,7 @@ namespace Squidex.Read.MongoDb.Utils
 
         private static void SetCreatedBy(SquidexEvent @event, MongoEntity entity)
         {
-            var withCreatedBy = entity as IEntityWithCreatedBy;
-
-            if (withCreatedBy != null)
+            if (entity is IEntityWithCreatedBy withCreatedBy)
             {
                 withCreatedBy.CreatedBy = @event.Actor;
             }
@@ -78,9 +74,7 @@ namespace Squidex.Read.MongoDb.Utils
 
         private static void SetLastModifiedBy(SquidexEvent @event, MongoEntity entity)
         {
-            var withModifiedBy = entity as IEntityWithLastModifiedBy;
-
-            if (withModifiedBy != null)
+            if (entity is IEntityWithLastModifiedBy withModifiedBy)
             {
                 withModifiedBy.LastModifiedBy = @event.Actor;
             }
@@ -88,10 +82,7 @@ namespace Squidex.Read.MongoDb.Utils
 
         private static void SetAppId(SquidexEvent @event, MongoEntity entity)
         {
-            var appEntity = entity as IAppRefEntity;
-            var appEvent = @event as AppEvent;
-
-            if (appEntity != null && appEvent != null)
+            if (entity is IAppRefEntity appEntity && @event is AppEvent appEvent)
             {
                 appEntity.AppId = appEvent.AppId.Id;
             }

src/Squidex.Read/Schemas/SchemaHistoryEventsCreator.cs

@@ -64,25 +64,21 @@ namespace Squidex.Read.Schemas
 
         protected override Task<HistoryEventToStore> CreateEventCoreAsync(Envelope<IEvent> @event)
         {
-            var schemaEvent = @event.Payload as SchemaEvent;
-
-            if (schemaEvent == null)
+            if (@event.Payload is SchemaEvent schemaEvent)
             {
-                return Task.FromResult<HistoryEventToStore>(null);
-            }
+                string channel = $"schemas.{schemaEvent.SchemaId.Name}";
 
-            string channel = $"schemas.{schemaEvent.SchemaId.Name}";
+                var result = ForEvent(@event.Payload, channel).AddParameter("Name", schemaEvent.SchemaId.Name);
 
-            var result = ForEvent(@event.Payload, channel).AddParameter("Name", schemaEvent.SchemaId.Name);
+                if (schemaEvent is FieldEvent fieldEvent)
+                {
+                    result.AddParameter("Field", fieldEvent.FieldId.Name);
+                }
 
-            var fieldEvent = schemaEvent as FieldEvent;
-
-            if (fieldEvent != null)
-            {
-                result.AddParameter("Field", fieldEvent.FieldId.Name);
+                return Task.FromResult(result);
             }
 
-            return Task.FromResult(result);
+            return Task.FromResult<HistoryEventToStore>(null);
         }
     }
 }

src/Squidex/Pipeline/CommandHandlers/EnrichWithActorHandler.cs

@@ -30,15 +30,20 @@ namespace Squidex.Pipeline.CommandHandlers
 
         public Task<bool> HandleAsync(CommandContext context)
         {
-            var squidexCommand = context.Command as SquidexCommand;
-
-            if (squidexCommand != null)
+            if (context.Command is SquidexCommand squidexCommand)
             {
                 var actorToken = 
                     FindActorFromSubject() ?? 
                     FindActorFromClient();
 
-                squidexCommand.Actor = actorToken ?? throw new SecurityException("No actor with subject or client id available");
+#pragma warning disable
+                if (actorToken == null)
+                {
+                    throw new SecurityException("No actor with subject or client id available");
+                }
+#pragma warning enable
+
+                squidexCommand.Actor = actorToken;
             }
 
             return TaskHelper.False;

src/Squidex/Pipeline/CommandHandlers/EnrichWithAppIdHandler.cs

@@ -29,9 +29,7 @@ namespace Squidex.Pipeline.CommandHandlers
 
         public Task<bool> HandleAsync(CommandContext context)
         {
-            var appCommand = context.Command as AppCommand;
-
-            if (appCommand != null)
+            if (context.Command is AppCommand appCommand)
             {
                 var appFeature = httpContextAccessor.HttpContext.Features.Get<IAppFeature>();
 

src/Squidex/Pipeline/CommandHandlers/EnrichWithSchemaIdHandler.cs

@@ -33,9 +33,7 @@ namespace Squidex.Pipeline.CommandHandlers
 
         public async Task<bool> HandleAsync(CommandContext context)
         {
-            var schemaCommand = context.Command as SchemaCommand;
-
-            if (schemaCommand != null)
+            if (context.Command is SchemaCommand schemaCommand)
             {
                 var routeValues = actionContextAccessor.ActionContext.RouteData.Values;
 

src/Squidex/Pipeline/CommandHandlers/SetVersionAsETagHandler.cs

@@ -25,9 +25,7 @@ namespace Squidex.Pipeline.CommandHandlers
 
         public Task<bool> HandleAsync(CommandContext context)
         {
-            var result = context.Result<object>() as EntitySavedResult;
-
-            if (result != null)
+            if (context.Result<object>() is EntitySavedResult result)
             {
                 httpContextAccessor.HttpContext.Response.Headers["ETag"] = new StringValues(result.Version.ToString());
             }

tests/Squidex.Infrastructure.Tests/CQRS/Commands/DefaultDomainObjectFactoryTests.cs

@@ -19,7 +19,8 @@ namespace Squidex.Infrastructure.CQRS.Commands
     {
         private sealed class DO : DomainObjectBase
         {
-            public DO(Guid id, int version) : base(id, version)
+            public DO(Guid id, int version) 
+                : base(id, version)
             {
             }
 
@@ -35,7 +36,7 @@ namespace Squidex.Infrastructure.CQRS.Commands
 
             var factoryFunction = new DomainObjectFactoryFunction<DO>(passedId =>
             {
-                return new DO(passedId, 0);
+                return new DO(passedId, -1);
             });
 
             serviceProvider.Setup(x => x.GetService(typeof(DomainObjectFactoryFunction<DO>))).Returns(factoryFunction);
@@ -47,7 +48,24 @@ namespace Squidex.Infrastructure.CQRS.Commands
             var domainObject = sut.CreateNew(typeof(DO), id);
 
             Assert.Equal(id, domainObject.Id);
-            Assert.Equal(0, domainObject.Version);
+            Assert.Equal(-1, domainObject.Version);
+        }
+
+        [Fact]
+        public void Should_throw_if_new_entity_has_invalid_version()
+        {
+            var serviceProvider = new Mock<IServiceProvider>();
+
+            var factoryFunction = new DomainObjectFactoryFunction<DO>(passedId =>
+            {
+                return new DO(passedId, 0);
+            });
+
+            serviceProvider.Setup(x => x.GetService(typeof(DomainObjectFactoryFunction<DO>))).Returns(factoryFunction);
+
+            var sut = new DefaultDomainObjectFactory(serviceProvider.Object);
+
+            Assert.Throws<InvalidOperationException>(() => sut.CreateNew(typeof(DO), Guid.NewGuid()));
         }
     }
 }

tests/Squidex.Infrastructure.Tests/CQRS/Commands/DefaultDomainObjectRepositoryTests.cs

@@ -141,7 +141,7 @@ namespace Squidex.Infrastructure.CQRS.Commands
             eventDataFormatter.Setup(x => x.ToEventData(It.Is<Envelope<IEvent>>(e => e.Payload == event1), commitId)).Returns(eventData1);
             eventDataFormatter.Setup(x => x.ToEventData(It.Is<Envelope<IEvent>>(e => e.Payload == event2), commitId)).Returns(eventData2);
 
-            eventStore.Setup(x => x.AppendEventsAsync(commitId, streamName, 122, It.Is<IEnumerable<EventData>>(e => e.Count() == 2)))
+            eventStore.Setup(x => x.AppendEventsAsync(commitId, streamName, 123, It.Is<IEnumerable<EventData>>(e => e.Count() == 2)))
                 .Returns(TaskHelper.Done)
                 .Verifiable();
 
@@ -167,7 +167,7 @@ namespace Squidex.Infrastructure.CQRS.Commands
             eventDataFormatter.Setup(x => x.ToEventData(It.Is<Envelope<IEvent>>(e => e.Payload == event1), commitId)).Returns(eventData1);
             eventDataFormatter.Setup(x => x.ToEventData(It.Is<Envelope<IEvent>>(e => e.Payload == event2), commitId)).Returns(eventData2);
 
-            eventStore.Setup(x => x.AppendEventsAsync(commitId, streamName, 122, new List<EventData> { eventData1, eventData2 }))
+            eventStore.Setup(x => x.AppendEventsAsync(commitId, streamName, 123, new List<EventData> { eventData1, eventData2 }))
                 .Throws(new WrongEventVersionException(1, 2))
                 .Verifiable();
 

tests/Squidex.Infrastructure.Tests/Json/ConverterContractResolverTests.cs

@@ -52,7 +52,7 @@ namespace Squidex.Infrastructure.Json
 
             var json = JsonConvert.SerializeObject(new MyClass { MyProperty = value }, serializerSettings);
 
-            Assert.Equal(@"{ ""MyProperty"": ""TODAY"" }", json);
+            Assert.Equal(@"{""myProperty"":""TODAY""}", json);
         }
 
         [Fact]

tests/Squidex.Write.Tests/TestHelpers/HandlerTestBase.cs

@@ -13,6 +13,8 @@ using Squidex.Infrastructure;
 using Squidex.Infrastructure.CQRS;
 using Squidex.Infrastructure.CQRS.Commands;
 
+#pragma warning disable IDE0019
+
 namespace Squidex.Write.TestHelpers
 {
     public abstract class HandlerTestBase<T> where T : DomainObjectBase
@@ -146,3 +148,6 @@ namespace Squidex.Write.TestHelpers
         }
     }
 }
+
+
+#pragma warning restore IDE0019