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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.Migrations
{
using System.Collections.Generic;
using System.Data.Entity.Migrations.Design;
using System.Data.Entity.Migrations.Infrastructure;
using System.Data.Entity.Migrations.Model;
using System.Data.Entity.Migrations.Sql;
using System.Linq;
using Xunit;
using Xunit.Extensions;
public abstract class AutoAndGenerateTestCase<TContextV1, TContextV2> : DbTestCase
where TContextV1 : DbContext
where TContextV2 : DbContext
{
private SqlInterceptor _upVerifier;
private SqlInterceptor _downVerifier;
private ScaffoldedMigration _generatedMigration_v1;
protected bool UpDataLoss { get; set; }
protected bool DownDataLoss { get; set; }
public override void Init(DatabaseProvider provider, ProgrammingLanguage language)
{
base.Init(provider, language);
_upVerifier = new SqlInterceptor(VerifyUpOperations);
_downVerifier = new SqlInterceptor(VerifyDownOperations);
}
[MigrationsTheory]
public void Automatic()
{
ResetDatabaseToV1();
DbMigrationsConfiguration migrationsConfiguration;
try
{
migrationsConfiguration =
CreateMigrationsConfiguration<TContextV2>(scaffoldedMigrations: _generatedMigration_v1);
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _upVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _upVerifier);
new DbMigrator(migrationsConfiguration).Update();
Assert.False(UpDataLoss);
}
catch (AutomaticDataLossException)
{
Assert.True(UpDataLoss);
migrationsConfiguration = CreateMigrationsConfiguration<TContextV2>(
automaticDataLossEnabled: true, scaffoldedMigrations: _generatedMigration_v1);
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _upVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _upVerifier);
new DbMigrator(migrationsConfiguration).Update();
}
// NOTE: This prevents no-op migrations from silently succeeding
if (!_upVerifier.WasCalled())
{
VerifyUpOperations(Enumerable.Empty<MigrationOperation>());
}
// Bring up via automatic
CreateMigrator<TContextV2>(automaticDataLossEnabled: true, scaffoldedMigrations: _generatedMigration_v1).Update();
try
{
migrationsConfiguration =
CreateMigrationsConfiguration<TContextV2>(scaffoldedMigrations: _generatedMigration_v1);
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _downVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _downVerifier);
new DbMigrator(migrationsConfiguration).Update(_generatedMigration_v1.MigrationId);
Assert.False(DownDataLoss);
}
catch (AutomaticDataLossException)
{
Assert.True(DownDataLoss);
migrationsConfiguration = CreateMigrationsConfiguration<TContextV2>(
automaticDataLossEnabled: true, scaffoldedMigrations: _generatedMigration_v1);
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _downVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _downVerifier);
new DbMigrator(migrationsConfiguration).Update(_generatedMigration_v1.MigrationId);
}
if (!_downVerifier.WasCalled())
{
VerifyDownOperations(Enumerable.Empty<MigrationOperation>());
}
}
[MigrationsTheory]
[InlineData(ProgrammingLanguage.CSharp)]
[InlineData(ProgrammingLanguage.VB)]
public void Generated(ProgrammingLanguage programmingLanguage)
{
ProgrammingLanguage = programmingLanguage;
ResetDatabaseToV1();
var migrator = CreateMigrator<TContextV2>(scaffoldedMigrations: _generatedMigration_v1);
var generatedMigration_v2 = new MigrationScaffolder(migrator.Configuration).Scaffold("V2");
var migrationsConfiguration =
CreateMigrationsConfiguration<TContextV2>(
scaffoldedMigrations: new[] { _generatedMigration_v1, generatedMigration_v2 });
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _upVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _upVerifier);
new DbMigrator(migrationsConfiguration).Update();
// Bring up via generated
CreateMigrator<TContextV2>(
scaffoldedMigrations: new[] { _generatedMigration_v1, generatedMigration_v2 })
.Update();
migrationsConfiguration =
CreateMigrationsConfiguration<TContextV2>(
scaffoldedMigrations: new[] { _generatedMigration_v1, generatedMigration_v2 });
migrationsConfiguration.SetSqlGenerator(DbProviders.Sql, _downVerifier);
migrationsConfiguration.SetSqlGenerator(DbProviders.SqlCe, _downVerifier);
new DbMigrator(migrationsConfiguration).Update(_generatedMigration_v1.MigrationId);
}
private void ResetDatabaseToV1()
{
ResetDatabase();
var migrator = CreateMigrator<TContextV1>();
_generatedMigration_v1 = new MigrationScaffolder(migrator.Configuration).Scaffold("V1");
CreateMigrator<TContextV1>(scaffoldedMigrations: _generatedMigration_v1).Update();
}
protected abstract void VerifyUpOperations(IEnumerable<MigrationOperation> migrationOperations);
protected abstract void VerifyDownOperations(IEnumerable<MigrationOperation> migrationOperations);
private class SqlInterceptor : MigrationSqlGenerator
{
private static readonly IList<Type> _excludedTypes
= new List<Type>
{
typeof(HistoryOperation)
};
private readonly Action<IEnumerable<MigrationOperation>> _verifyAction;
private bool _wasCalled;
public SqlInterceptor(Action<IEnumerable<MigrationOperation>> verifyAction)
{
_verifyAction = verifyAction;
}
public override IEnumerable<MigrationStatement> Generate(
IEnumerable<MigrationOperation> migrationOperations, string providerManifestToken)
{
_wasCalled = true;
_verifyAction(migrationOperations.Where(mo => !_excludedTypes.Contains(mo.GetType())).ToList());
return Enumerable.Empty<MigrationStatement>();
}
public bool WasCalled()
{
var wasCalled = _wasCalled;
_wasCalled = false;
return wasCalled;
}
}
}
#region Model stubs
public class AutoAndGenerateContext_v1 : DbContext
{
public AutoAndGenerateContext_v1()
: base("AutoAndGenerateContext_v1")
{
}
}
public class AutoAndGenerateContext_v2 : DbContext
{
public AutoAndGenerateContext_v2()
: base("AutoAndGenerateContext_v2")
{
}
}
#endregion
}
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