Galen.Ci.EntityFramework.Tests.DbDeploymentManagerIntegrationTests.CorrectlyMigratesDownwardUsingDeploymentHistoryCreatedByMigration C# (CSharp) Method

        public void CorrectlyMigratesDownwardUsingDeploymentHistoryCreatedByMigration()
        {
            const string serverName = @"(localdb)\mssqllocaldb";
            var databaseName = $"GalenTest_{Guid.NewGuid():N}";

            var assemblyLoader = new AssemblyLoader();

            // start at v1
            var initialDeploymentAssemblyPath = TestUtils.BuildTestAssemblyPath(1);
            TestUtils.InitializeDatabase(assemblyLoader, initialDeploymentAssemblyPath, "Pinpoint.Test.Data.TestContext", serverName, databaseName);

            // migrate upward from v1 to v3
            var upwardMigrationConfig = new DbDeploymentManagerConfiguration
            {
                TargetAssemblyPath = TestUtils.BuildTestAssemblyPath(3),
                Database = new DatabaseEndpoint { ServerName = serverName, DatabaseName = databaseName },
                MigrationConfig = new MigrationConfigurationInfo
                {
                    Type = "Pinpoint.Test.Data.Migrations.Configuration"
                }
            };

            var expectedUpwardMigrationHistory = new[]
            {
                "201404181533201_InitialCreate",
                "201404181719410_AddedAddresInfoToCustomer",
                "201404181726158_MoveAddressInformationIntoContactInfo",
                "201404181729406_AddedRowVersionToDomainObjectBase",
                "201404181740359_AddedMultiplePropertiesToCustomer"
            };

            try
            {
                var sut = new DbDeploymentManager(
                    upwardMigrationConfig, 
                    assemblyLoader,
                    new SqlClientDbConnectionInfoBuilder());
                sut.Deploy();

                var actualDeploymentHistoryRowCount = TestUtils.GetDeploymentHistoryRowCount(
                    serverName, 
                    databaseName,
                    upwardMigrationConfig.MigrationConfig.Type);
                Assert.AreEqual(1, actualDeploymentHistoryRowCount);

                var migrationHistory = TestUtils.GetMigrationHistory(
                    serverName, 
                    databaseName,
                    upwardMigrationConfig.MigrationConfig.Type);

                Assert.IsNotNull(migrationHistory);
                Assert.AreEqual(expectedUpwardMigrationHistory.Length, migrationHistory.Count());
                Assert.IsTrue(expectedUpwardMigrationHistory.SequenceEqual(migrationHistory));
            }
            catch
            {
                // be sure to clean up
                TestUtils.DropDatabase(
                    upwardMigrationConfig.Database.ServerName,
                    upwardMigrationConfig.Database.DatabaseName);

                throw;
            }

            // migrate downward from v3 to v1 using Deployment History
            var downwardMigrationConfig = new DbDeploymentManagerConfiguration
            {
                TargetAssemblyPath = TestUtils.BuildTestAssemblyPath(1),
                Database = new DatabaseEndpoint { ServerName = serverName, DatabaseName = databaseName },
                MigrationConfig = new MigrationConfigurationInfo
                {
                    Type = "Pinpoint.Test.Data.Migrations.Configuration"
                }
            };

            var expectedDownwardMigrationHistory = new[]
            {
                "201404181533201_InitialCreate",
                "201404181719410_AddedAddresInfoToCustomer",
            };

            try
            {
                var sut = new DbDeploymentManager(
                    downwardMigrationConfig, 
                    assemblyLoader,
                    new SqlClientDbConnectionInfoBuilder());
                sut.Deploy();

                var actualDeploymentHistoryRowCount = TestUtils.GetDeploymentHistoryRowCount(
                    serverName, 
                    databaseName,
                    downwardMigrationConfig.MigrationConfig.Type);
                Assert.AreEqual(2, actualDeploymentHistoryRowCount);

                var migrationHistory = TestUtils.GetMigrationHistory(
                    serverName, 
                    databaseName,
                    downwardMigrationConfig.MigrationConfig.Type);

                Assert.IsNotNull(migrationHistory);
                Assert.AreEqual(expectedDownwardMigrationHistory.Length, migrationHistory.Count());
                Assert.IsTrue(expectedDownwardMigrationHistory.SequenceEqual(migrationHistory));
            }
            finally
            {
                //Be sure to clean up
                TestUtils.DropDatabase(downwardMigrationConfig.Database.ServerName, downwardMigrationConfig.Database.DatabaseName);
            }
        }