replace office-data-import by db-restore (#154)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: #154
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

.run/ImportHostingAssets.run.xml

@@ -6,6 +6,7 @@
           <entry key="HSADMINNG_MIGRATION_DATA_PATH" value="migration" />
           <entry key="HSADMINNG_POSTGRES_ADMIN_USERNAME" value="admin" />
           <entry key="HSADMINNG_POSTGRES_RESTRICTED_USERNAME" value="restricted" />
+          <entry key="HSADMINNG_SUPERUSER" value="import-superuser@hostsharing.net" />
         </map>
       </option>
       <option name="executionName" />

src/main/resources/db/changelog/0-base/009-check-environment.sql

@@ -1,6 +1,6 @@
 --liquibase formatted sql
 
--- FIXME: check if we really need the restricted user
+-- TODO.impl: check if we really need the restricted user
 
 -- ============================================================================
 -- NUMERIC-HASH-FUNCTIONS

src/main/resources/db/changelog/6-hs-booking/630-booking-item/6300-hs-booking-item.sql

@@ -25,7 +25,7 @@ create table if not exists hs_booking.item
     caption             varchar(80) not null,
     resources           jsonb not null,
 
-    constraint booking_item_has_project_or_parent_asset
+    constraint booking_item_has_project_or_parent_item
         check (projectUuid is not null or parentItemUuid is not null)
 );
 --//

src/main/resources/db/changelog/9-hs-global/9800-cleanup.sql

@@ -0,0 +1,38 @@
+--liquibase formatted sql
+
+-- ============================================================================
+--changeset michael.hoennig:hs-global-office-test-ddl-cleanup context:hosting-asset-import endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+DROP PROCEDURE IF EXISTS hs_office.bankaccount_create_test_data(IN givenholder character varying, IN giveniban character varying, IN givenbic character varying);
+DROP PROCEDURE IF EXISTS hs_office.contact_create_test_data(IN contcaption character varying);
+DROP PROCEDURE IF EXISTS hs_office.contact_create_test_data(IN startcount integer, IN endcount integer);
+DROP PROCEDURE IF EXISTS hs_office.coopassettx_create_test_data(IN givenpartnernumber numeric, IN givenmembernumbersuffix character);
+DROP PROCEDURE IF EXISTS hs_office.coopsharetx_create_test_data(IN givenpartnernumber numeric, IN givenmembernumbersuffix character);
+DROP PROCEDURE IF EXISTS hs_office.debitor_create_test_data(IN withdebitornumbersuffix numeric, IN forpartnerpersonname character varying, IN forbillingcontactcaption character varying, IN withdefaultprefix character varying);
+DROP PROCEDURE IF EXISTS hs_office.membership_create_test_data(IN forpartnernumber numeric, IN newmembernumbersuffix character);
+DROP PROCEDURE IF EXISTS hs_office.partner_create_test_data(IN mandanttradename character varying, IN newpartnernumber numeric, IN partnerpersonname character varying, IN contactcaption character varying);
+DROP PROCEDURE IF EXISTS hs_office.person_create_test_data(IN newpersontype hs_office.persontype, IN newtradename character varying, IN newfamilyname character varying, IN newgivenname character varying);
+DROP PROCEDURE IF EXISTS hs_office.relation_create_test_data(IN startcount integer, IN endcount integer);
+DROP PROCEDURE IF EXISTS hs_office.relation_create_test_data(IN holderpersonname character varying, IN relationtype hs_office.relationtype, IN anchorpersonname character varying, IN contactcaption character varying, IN mark character varying);
+DROP PROCEDURE IF EXISTS hs_office.sepamandate_create_test_data(IN forpartnernumber numeric, IN fordebitorsuffix character, IN foriban character varying, IN withreference character varying);
+--//
+
+
+-- ============================================================================
+--changeset michael.hoennig:hs-global-rbac-test-ddl-cleanup context:hosting-asset-import endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+DROP SCHEMA IF EXISTS rbactest CASCADE;
+--//
+
+
+-- ============================================================================
+--changeset michael.hoennig:hs-global-rbac-test-dml-cleanup context:hosting-asset-import endDelimiter:--//
+-- ----------------------------------------------------------------------------
+
+call base.defineContext('9800-cleanup', null, '${HSADMINNG_SUPERUSER}', null);
+
+DELETE FROM rbac.subject WHERE name='superuser-alex@hostsharing.net';
+DELETE FROM rbac.subject WHERE name='superuser-fran@hostsharing.net';
+--//

src/main/resources/db/changelog/db.changelog-master.yaml

@@ -212,6 +212,10 @@ databaseChangeLog:
         file: db/changelog/9-hs-global/9000-statistics.sql
         context: "!only-office"
 
+    - include:
+          file: db/changelog/9-hs-global/9800-cleanup.sql
+          context: "without-test-data"
+
     - include:
         file: db/changelog/9-hs-global/9100-hs-integration-schema.sql
     - include:

src/test/java/net/hostsharing/hsadminng/hs/migration/BaseOfficeDataImport.java

@@ -115,11 +115,18 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
 
     @Test
     @Order(1)
-    void verifyInitialDatabase() {
-        // SQL DELETE for thousands of records takes too long, so we make sure, we only start with initial or test data
-        final var contactCount = (Integer) em.createNativeQuery("select count(*) from hs_office.contact", Integer.class)
-                .getSingleResult();
-        assertThat(contactCount).isLessThan(20);
+    void verifyInitialDatabaseHasNoTestData() {
+        assertThat((Integer) em.createNativeQuery(
+                        "select count(*) from hs_office.contact",
+                        Integer.class)
+                .getSingleResult()).isEqualTo(0);
+        assertThat((Integer) em.createNativeQuery(
+                        """
+                        SELECT count(*) FROM information_schema.tables
+                                 WHERE table_schema = 'rbactest' AND table_name = 'customer'
+                        """,
+                        Integer.class)
+                .getSingleResult()).isEqualTo(0);
     }
 
     @Test
@@ -624,11 +631,9 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
     void persistOfficeEntities() {
 
         System.out.println("PERSISTING office data to database '" + jdbcUrl + "' as user '" + postgresAdminUser + "'");
-        deleteTestDataFromHsOfficeTables();
-        resetHsOfficeSequences();
-        deleteFromTestTables();
-        deleteFromCommonTables();
+        makeSureThatTheImportAdminUserExists();
 
+        assertEmptyTable("hs_office.contact");
         jpaAttempt.transacted(() -> {
             context(rbacSuperuser);
             contacts.forEach(this::persist);
@@ -646,6 +651,7 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
         }).assertSuccessful();
 
         System.out.println("persisting " + partners.size() + " partners");
+        assertEmptyTable("hs_office.partner");
         jpaAttempt.transacted(() -> {
             context(rbacSuperuser);
             partners.forEach((id, partner) -> {
@@ -697,6 +703,12 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
         }).assertSuccessful();
 
     }
+    private void assertEmptyTable(final String qualifiedTableName) {
+        assertThat((Integer) em.createNativeQuery(
+                        "select count(*) from " + qualifiedTableName,
+                        Integer.class)
+                .getSingleResult()).describedAs("expected empty " + qualifiedTableName).isEqualTo(0);
+    }
 
     @Test
     @Order(9190)
@@ -883,7 +895,6 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
                     coopAssets.put(rec.getInteger("member_asset_id"), assetTransaction);
                 });
 
-
         coopAssets.entrySet().forEach(entry -> {
             final var legacyId = entry.getKey();
             final var assetTransaction = entry.getValue();
@@ -896,7 +907,9 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
         });
     }
 
-    private static void connectToRelatedRevertedAssetTx(final int legacyId, final HsOfficeCoopAssetsTransactionEntity assetTransaction) {
+    private static void connectToRelatedRevertedAssetTx(
+            final int legacyId,
+            final HsOfficeCoopAssetsTransactionEntity assetTransaction) {
         final var negativeValue = assetTransaction.getAssetValue().negate();
         final var revertedAssetTx = coopAssets.values().stream().filter(a ->
                         a.getTransactionType() != HsOfficeCoopAssetsTransactionType.REVERSAL &&
@@ -909,11 +922,14 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
         //revertedAssetTx.setAssetReversalTx(assetTransaction);
     }
 
-    private static void connectToRelatedAdoptionAssetTx(final int legacyId, final HsOfficeCoopAssetsTransactionEntity assetTransaction) {
+    private static void connectToRelatedAdoptionAssetTx(
+            final int legacyId,
+            final HsOfficeCoopAssetsTransactionEntity assetTransaction) {
         final var negativeValue = assetTransaction.getAssetValue().negate();
         final var adoptionAssetTx = coopAssets.values().stream().filter(a ->
                         a.getTransactionType() == HsOfficeCoopAssetsTransactionType.ADOPTION &&
-                                (!a.getValueDate().equals(LocalDate.of( 2014 , 12 , 31)) || a.getComment().contains(Integer.toString(assetTransaction.getMembership().getMemberNumber()/100))) &&
+                                (!a.getValueDate().equals(LocalDate.of(2014, 12, 31)) || a.getComment()
+                                        .contains(Integer.toString(assetTransaction.getMembership().getMemberNumber() / 100))) &&
                                 a.getMembership() != assetTransaction.getMembership() &&
                                 a.getValueDate().equals(assetTransaction.getValueDate()) &&
                                 a.getAssetValue().equals(negativeValue))
@@ -1138,7 +1154,7 @@ public abstract class BaseOfficeDataImport extends CsvDataImport {
                         person.getFamilyName()
         ).toLowerCase();
 
-        if ( !distinctPersons.containsKey(personKey) ) {
+        if (!distinctPersons.containsKey(personKey)) {
             distinctPersons.put(personKey, person);
         }
         return distinctPersons.get(personKey);

src/test/java/net/hostsharing/hsadminng/hs/migration/CsvDataImport.java

@@ -248,63 +248,22 @@ public class CsvDataImport extends ContextBasedTest {
         return json;
     }
 
-    protected void deleteTestDataFromHsOfficeTables() {
+    protected void makeSureThatTheImportAdminUserExists() {
         jpaAttempt.transacted(() -> {
-            context(rbacSuperuser);
-            // TODO.perf: could we instead skip creating test-data based on an env var?
-            em.createNativeQuery("delete from hs_hosting.asset where true").executeUpdate();
-            em.createNativeQuery("delete from hs_hosting.asset_ex where true").executeUpdate();
-            em.createNativeQuery("delete from hs_booking.item where true").executeUpdate();
-            em.createNativeQuery("delete from hs_booking.item_ex where true").executeUpdate();
-            em.createNativeQuery("delete from hs_booking.project where true").executeUpdate();
-            em.createNativeQuery("delete from hs_booking.project_ex where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.coopassettx where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.coopassettx_legacy_id where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.coopsharetx where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.coopsharetx_legacy_id where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.membership where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.sepamandate where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.sepamandate_legacy_id where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.debitor where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.bankaccount where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.partner where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.partner_details where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.relation where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.contact where true").executeUpdate();
-            em.createNativeQuery("delete from hs_office.person where true").executeUpdate();
-        }).assertSuccessful();
-    }
-
-    protected void resetHsOfficeSequences() {
-        jpaAttempt.transacted(() -> {
-            context(rbacSuperuser);
-            em.createNativeQuery("alter sequence hs_office.contact_legacy_id_seq restart with 1000000000;").executeUpdate();
-            em.createNativeQuery("alter sequence hs_office.coopassettx_legacy_id_seq restart with 1000000000;")
+            context(null);
+            em.createNativeQuery("""
+                do language plpgsql $$
+                    declare
+                        admins uuid;
+                    begin
+                        if not exists (select 1 from rbac.subject where name = '${rbacSuperuser}') then
+                            admins = rbac.findRoleId(rbac.global_ADMIN());
+                            call rbac.grantRoleToSubjectUnchecked(admins, admins, rbac.create_subject('${rbacSuperuser}'));
+                        end if;
+                    end;
+                $$;
+                """.replace("${rbacSuperuser}", rbacSuperuser))
                 .executeUpdate();
-            em.createNativeQuery("alter sequence public.hs_office.coopsharetx_legacy_id_seq restart with 1000000000;")
-                    .executeUpdate();
-            em.createNativeQuery("alter sequence public.hs_office.partner_legacy_id_seq restart with 1000000000;")
-                    .executeUpdate();
-            em.createNativeQuery("alter sequence public.hs_office.sepamandate_legacy_id_seq restart with 1000000000;")
-                    .executeUpdate();
-        });
-    }
-
-    protected void deleteFromTestTables() {
-        jpaAttempt.transacted(() -> {
-            context(rbacSuperuser);
-            em.createNativeQuery("delete from rbactest.domain where true").executeUpdate();
-            em.createNativeQuery("delete from rbactest.package where true").executeUpdate();
-            em.createNativeQuery("delete from rbactest.customer where true").executeUpdate();
-        }).assertSuccessful();
-    }
-
-    protected void deleteFromCommonTables() {
-        jpaAttempt.transacted(() -> {
-            context(rbacSuperuser);
-            em.createNativeQuery("delete from rbac.subject_rv where name not like 'superuser-%'").executeUpdate();
-            em.createNativeQuery("delete from base.tx_journal where true").executeUpdate();
-            em.createNativeQuery("delete from base.tx_context where true").executeUpdate();
         }).assertSuccessful();
     }
 

src/test/java/net/hostsharing/hsadminng/hs/migration/ImportHostingAssets.java

@@ -7,6 +7,7 @@ import net.hostsharing.hsadminng.context.Context;
 import net.hostsharing.hsadminng.hash.HashGenerator;
 import net.hostsharing.hsadminng.hash.HashGenerator.Algorithm;
 import net.hostsharing.hsadminng.hs.booking.debitor.HsBookingDebitorEntity;
+import net.hostsharing.hsadminng.hs.booking.debitor.HsBookingDebitorRepository;
 import net.hostsharing.hsadminng.hs.booking.item.HsBookingItem;
 import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemRealEntity;
 import net.hostsharing.hsadminng.hs.booking.item.HsBookingItemType;
@@ -27,12 +28,14 @@ import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestMethodOrder;
 import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
 import org.springframework.test.annotation.Commit;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.jdbc.Sql;
 
 import java.io.Reader;
 import java.net.IDN;
@@ -44,6 +47,7 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 import java.util.TreeMap;
+import java.util.UUID;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Function;
@@ -76,56 +80,23 @@ import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.UNIX
 import static net.hostsharing.hsadminng.mapper.PostgresDateRange.toPostgresDateRange;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assumptions.assumeThat;
+import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TEST_CLASS;
 
-/*
- * This 'test' includes the complete legacy 'office' data import.
- *
- * There is no code in 'main' because the import is not needed a normal runtime.
- * There is some test data in Java resources to verify the data conversion.
- * For a real import a main method will be added later
- * which reads CSV files from the file system.
- *
- * When run on a Hostsharing database, it needs the following settings (hsh99_... just examples).
- *
- * In a real Hostsharing environment, these are created via (the old) hsadmin:
-
-    CREATE USER hsh99_admin WITH PASSWORD 'password';
-    CREATE DATABASE hsh99_hsadminng  ENCODING 'UTF8' TEMPLATE template0;
-    REVOKE ALL ON DATABASE hsh99_hsadminng FROM public; -- why does hsadmin do that?
-    ALTER DATABASE hsh99_hsadminng OWNER TO hsh99_admin;
-
-    CREATE USER hsh99_restricted WITH PASSWORD 'password';
-
-    \c hsh99_hsadminng
-
-    GRANT ALL PRIVILEGES ON SCHEMA public to hsh99_admin;
-
- * Additionally, we need these settings (because the Hostsharing DB-Admin has no CREATE right):
-
-    CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
-
-    -- maybe something like that is needed for the 2nd user
-    -- GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public to hsh99_restricted;
-
- * Then copy the file .tc-environment to a file named .environment (excluded from git) and fill in your specific values.
-
- * To finally import the office data, run:
- *
- *   gw-importHostingAssets # comes from .aliases file and uses .environment
- */
 @Tag("importHostingAssets")
 @DataJpaTest(properties = {
         "spring.datasource.url=${HSADMINNG_POSTGRES_JDBC_URL:jdbc:tc:postgresql:15.5-bookworm:///importHostingAssetsTC}",
         "spring.datasource.username=${HSADMINNG_POSTGRES_ADMIN_USERNAME:ADMIN}",
         "spring.datasource.password=${HSADMINNG_POSTGRES_ADMIN_PASSWORD:password}",
-        "hsadminng.superuser=${HSADMINNG_SUPERUSER:superuser-alex@hostsharing.net}"
+        "hsadminng.superuser=${HSADMINNG_SUPERUSER:import-superuser@hostsharing.net}",
+        "spring.liquibase.enabled=false" // @Sql should go first, Liquibase will be initialized programmatically
 })
 @DirtiesContext
-@Import({ Context.class, JpaAttempt.class })
-@ActiveProfiles("without-test-data")
+@Import({ Context.class, JpaAttempt.class, LiquibaseConfig.class })
+@ActiveProfiles({ "without-test-data", "liquibase-migration", "hosting-asset-import" })
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 @ExtendWith(OrderedDependedTestsExtension.class)
-public class ImportHostingAssets extends BaseOfficeDataImport {
+@Sql(value = "/db/released-only-office-schema-with-import-test-data.sql", executionPhase = BEFORE_TEST_CLASS) // release-schema
+public class ImportHostingAssets extends CsvDataImport {
 
     private static final Set<String> NOBODY_SUBSTITUTES = Set.of("nomail", "bounce");
 
@@ -156,13 +127,48 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
 
     final ObjectMapper jsonMapper = new ObjectMapper();
 
+    @Autowired
+    HsBookingDebitorRepository debitorRepo;
+
+    @Autowired
+    LiquibaseMigration liquibase;
+
+    @Test
+    @Order(11000)
+    void liquibaseMigrationForBookingAndHosting() {
+        liquibase.assertReferenceStatusAfterRestore(286, "hs-booking-SCHEMA");
+        makeSureThatTheImportAdminUserExists();
+        liquibase.runWithContexts("migration", "without-test-data");
+        liquibase.assertThatCurrentMigrationsGotApplied(331, "hs-booking-SCHEMA");
+    }
+
+    record PartnerLegacyIdMapping(UUID uuid, Integer bp_id){}
+    record DebitorRecord(UUID uuid, Integer version, String defaultPrefix){}
+
     @Test
     @Order(11010)
     void createBookingProjects() {
-        debitors.forEach((id, debitor) -> {
-            bookingProjects.put(id, HsBookingProjectRealEntity.builder()
-                    .caption(debitor.getDefaultPrefix() + " default project")
-                    .debitor(em.find(HsBookingDebitorEntity.class, debitor.getUuid()))
+
+        final var partnerLegacyIdMappings = em.createNativeQuery(
+                """
+                        select debitor.uuid, pid.bp_id
+                            from hs_office.debitor debitor
+                            join hs_office.relation debitorRel on debitor.debitorReluUid=debitorRel.uuid
+                            join hs_office.relation partnerRel on partnerRel.holderUuid=debitorRel.anchorUuid
+                            join hs_office.partner partner on partner.partnerReluUid=partnerRel.uuid
+                            join hs_office.partner_legacy_id pid on partner.uuid=pid.uuid
+                        """, PartnerLegacyIdMapping.class).getResultList();
+        //noinspection unchecked
+        final var debitorUuidToLegacyBpIdMap = ((List<PartnerLegacyIdMapping>) partnerLegacyIdMappings).stream()
+                .collect(toMap(row -> row.uuid, row -> row.bp_id));
+        final var debitors = em.createNativeQuery("SELECT debitor.uuid, debitor.version, debitor.defaultPrefix FROM hs_office.debitor debitor", DebitorRecord.class).getResultList();
+        //noinspection unchecked
+        ((List<DebitorRecord>)debitors).forEach(debitor -> {
+                    bookingProjects.put(
+                            debitorUuidToLegacyBpIdMap.get(debitor.uuid), HsBookingProjectRealEntity.builder()
+                                    .version(debitor.version)
+                                    .caption(debitor.defaultPrefix + " default project")
+                                    .debitor(em.find(HsBookingDebitorEntity.class, debitor.uuid))
                                     .build());
                 });
     }
@@ -728,9 +734,12 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
         if (isImportingControlledTestData()) {
             expectError("zonedata dom_owner of mellis.de is old00 but expected to be mim00");
             expectError("\nexpected: \"vm1068\"\n but was: \"vm1093\"");
-            expectError("['EMAIL_ADDRESS:webmaster@hamburg-west.l-u-g.org.config.target' is expected to match any of [^[a-z][a-z0-9]{2}[0-9]{2}(-[a-z0-9][a-z0-9\\.+_-]*)?$, ^([a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+)?@[a-zA-Z0-9.-]+$, ^nobody$, ^/dev/null$] but 'raoul.lottmann@example.com peter.lottmann@example.com' does not match any]");
-            expectError("['EMAIL_ADDRESS:abuse@mellis.de.config.target' length is expected to be at min 1 but length of [[]] is 0]");
-            expectError("['EMAIL_ADDRESS:abuse@ist-im-netz.de.config.target' length is expected to be at min 1 but length of [[]] is 0]");
+            expectError(
+                    "['EMAIL_ADDRESS:webmaster@hamburg-west.l-u-g.org.config.target' is expected to match any of [^[a-z][a-z0-9]{2}[0-9]{2}(-[a-z0-9][a-z0-9\\.+_-]*)?$, ^([a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+)?@[a-zA-Z0-9.-]+$, ^nobody$, ^/dev/null$] but 'raoul.lottmann@example.com peter.lottmann@example.com' does not match any]");
+            expectError(
+                    "['EMAIL_ADDRESS:abuse@mellis.de.config.target' length is expected to be at min 1 but length of [[]] is 0]");
+            expectError(
+                    "['EMAIL_ADDRESS:abuse@ist-im-netz.de.config.target' length is expected to be at min 1 but length of [[]] is 0]");
         }
         this.assertNoErrors();
     }
@@ -738,7 +747,7 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
     // --------------------------------------------------------------------------------------------
 
     @Test
-    @Order(19000)
+    @Order(19100)
     @Commit
     void persistBookingProjects() {
 
@@ -751,7 +760,7 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
     }
 
     @Test
-    @Order(19010)
+    @Order(19110)
     @Commit
     void persistBookingItems() {
 
@@ -1071,13 +1080,14 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
 
         final var haCount = jpaAttempt.transacted(() -> {
             context(rbacSuperuser, "hs_booking.project#D-1000300-mimdefaultproject:AGENT");
-                    return (Integer) em.createNativeQuery("select count(*) from hs_hosting.asset_rv where type='EMAIL_ADDRESS'", Integer.class)
+            return (Integer) em.createNativeQuery(
+                            "select count(*) from hs_hosting.asset_rv where type='EMAIL_ADDRESS'",
+                            Integer.class)
                     .getSingleResult();
         }).assertSuccessful().returnedValue();
         assertThat(haCount).isEqualTo(68);
     }
 
-
     // ============================================================================================
 
     @Test
@@ -1262,14 +1272,14 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
                         managedWebspace.setParentAsset(parentAsset);
 
                         if (parentAsset.getRelatedProject() != managedWebspace.getRelatedProject()
-                                && managedWebspace.getRelatedProject().getDebitor().getDebitorNumber() == 10000_00 ) {
+                                && managedWebspace.getRelatedProject().getDebitor().getDebitorNumber() == 10000_00) {
                             assertThat(managedWebspace.getIdentifier()).startsWith("xyz");
                             final var hshDebitor = managedWebspace.getBookingItem().getProject().getDebitor();
                             final var newProject = HsBookingProjectRealEntity.builder()
                                     .debitor(hshDebitor)
                                     .caption(parentAsset.getIdentifier() + " Monitor")
                                     .build();
-                            bookingProjects.put(Collections.max(bookingProjects.keySet())+1, newProject);
+                            bookingProjects.put(Collections.max(bookingProjects.keySet()) + 1, newProject);
                             managedWebspace.getBookingItem().setProject(newProject);
                         } else {
                             managedWebspace.getBookingItem().setParentItem(parentAsset.getBookingItem());
@@ -1624,18 +1634,23 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
                                     entry("includes", options.contains("includes")),
                                     entry("letsencrypt", options.contains("letsencrypt")),
                                     entry("multiviews", options.contains("multiviews")),
-                                    entry("subdomains", withDefault(rec.getString("valid_subdomain_names"), "*")
+                                    entry(
+                                            "subdomains", withDefault(rec.getString("valid_subdomain_names"), "*")
                                                     .split(",")),
-                                    entry("fcgi-php-bin", withDefault(
+                                    entry(
+                                            "fcgi-php-bin", withDefault(
                                                     rec.getString("fcgi_php_bin"),
                                                     httpDomainSetupValidator.getProperty("fcgi-php-bin").defaultValue())),
-                                    entry("passenger-nodejs", withDefault(
+                                    entry(
+                                            "passenger-nodejs", withDefault(
                                                     rec.getString("passenger_nodejs"),
                                                     httpDomainSetupValidator.getProperty("passenger-nodejs").defaultValue())),
-                                    entry("passenger-python", withDefault(
+                                    entry(
+                                            "passenger-python", withDefault(
                                                     rec.getString("passenger_python"),
                                                     httpDomainSetupValidator.getProperty("passenger-python").defaultValue())),
-                                    entry("passenger-ruby", withDefault(
+                                    entry(
+                                            "passenger-ruby", withDefault(
                                                     rec.getString("passenger_ruby"),
                                                     httpDomainSetupValidator.getProperty("passenger-ruby").defaultValue()))
                             ))
@@ -1744,7 +1759,8 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
                     logError(() -> assertThat(vmName).isEqualTo(domUser.getParentAsset().getParentAsset().getIdentifier()));
 
                     //noinspection unchecked
-                    zoneData.put("user-RR", ((ArrayList<ArrayList<Object>>) zoneData.get("user-RR")).stream()
+                    zoneData.put(
+                            "user-RR", ((ArrayList<ArrayList<Object>>) zoneData.get("user-RR")).stream()
                                     .map(userRR -> userRR.stream().map(Object::toString).collect(joining(" ")))
                                     .toArray(String[]::new)
                     );
@@ -1898,10 +1914,10 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
         //noinspection unchecked
         return ((List<List<?>>) em.createNativeQuery(
                         """
-                     SELECT li.* FROM hs_hosting.asset_legacy_id li
-                     JOIN hs_hosting.asset ha ON ha.uuid=li.uuid
-                     WHERE CAST(ha.type AS text)=:type
-                     ORDER BY legacy_id
+                                 select li.* from hs_hosting.asset_legacy_id li
+                                 join hs_hosting.asset ha on ha.uuid=li.uuid
+                                 where cast(ha.type as text)=:type
+                                 order by legacy_id
                                 """,
                         List.class)
                 .setParameter("type", type.name())
@@ -1913,10 +1929,10 @@ public class ImportHostingAssets extends BaseOfficeDataImport {
         //noinspection unchecked
         return ((List<List<?>>) em.createNativeQuery(
                         """
-                    SELECT ha.uuid, ha.type, ha.identifier FROM hs_hosting.asset ha
-                             JOIN hs_hosting.asset_legacy_id li ON li.uuid=ha.uuid
-                             WHERE li.legacy_id is null AND CAST(ha.type AS text)=:type
-                             ORDER BY li.legacy_id
+                                select ha.uuid, ha.type, ha.identifier from hs_hosting.asset ha
+                                         join hs_hosting.asset_legacy_id li on li.uuid=ha.uuid
+                                         where li.legacy_id is null and cast(ha.type as text)=:type
+                                         order by li.legacy_id
                                 """,
                         List.class)
                 .setParameter("type", type.name())

src/test/java/net/hostsharing/hsadminng/hs/migration/ImportOfficeData.java

@@ -4,11 +4,14 @@ import net.hostsharing.hsadminng.context.Context;
 import net.hostsharing.hsadminng.rbac.test.JpaAttempt;
 import org.junit.jupiter.api.*;
 import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
 
+import java.io.File;
+
 /*
  * This 'test' includes the complete legacy 'office' data import.
  *
@@ -50,7 +53,8 @@ import org.springframework.test.context.ActiveProfiles;
         "spring.datasource.url=${HSADMINNG_POSTGRES_JDBC_URL:jdbc:tc:postgresql:15.5-bookworm:///importOfficeDataTC}",
         "spring.datasource.username=${HSADMINNG_POSTGRES_ADMIN_USERNAME:ADMIN}",
         "spring.datasource.password=${HSADMINNG_POSTGRES_ADMIN_PASSWORD:password}",
-        "hsadminng.superuser=${HSADMINNG_SUPERUSER:superuser-alex@hostsharing.net}"
+        "hsadminng.superuser=${HSADMINNG_SUPERUSER:import-superuser@hostsharing.net}",
+        "spring.liquibase.contexts=only-office,without-test-data"
 })
 @ActiveProfiles("without-test-data")
 @DirtiesContext
@@ -58,4 +62,13 @@ import org.springframework.test.context.ActiveProfiles;
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 @ExtendWith(OrderedDependedTestsExtension.class)
 public class ImportOfficeData extends BaseOfficeDataImport {
+
+    @Value("${spring.datasource.url}")
+    private String jdbcUrl;
+
+    @Test
+    @Order(9999)
+    public void dumpOfficeData() {
+        PostgresTestcontainer.dump(jdbcUrl, new File("build/db/released-only-office-schema-with-import-test-data.sql"));
+    }
 }

src/test/java/net/hostsharing/hsadminng/hs/migration/LiquibaseCompatibilityIntegrationTest.java

@@ -1,33 +1,17 @@
 package net.hostsharing.hsadminng.hs.migration;
 
-import liquibase.Liquibase;
-import lombok.SneakyThrows;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.jdbc.Sql;
-import org.testcontainers.containers.JdbcDatabaseContainer;
-import org.testcontainers.jdbc.ContainerDatabaseDriver;
 
-import jakarta.persistence.EntityManager;
-import jakarta.persistence.PersistenceContext;
-import javax.sql.DataSource;
-import java.io.BufferedReader;
 import java.io.File;
-import java.io.InputStreamReader;
-import java.util.List;
-import java.util.Objects;
-import java.util.stream.Collectors;
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-import static org.apache.commons.io.FileUtils.readFileToString;
-import static org.apache.commons.io.FileUtils.write;
-import static org.apache.commons.io.FileUtils.writeStringToFile;
-import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TEST_CLASS;
 
 // BLOG: Liquibase-migration-test (not before the reference-SQL-dump-generation is simplified)
@@ -40,9 +24,9 @@ import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TE
  * <p>The test works as follows:</p>
  *
  * <ol>
- *     <li>the database is initialized by `db/prod-only-office-schema-with-test-data.sql` from the test-resources</li>
+ *     <li>the database is initialized by `db/released-only-office-schema-with-test-data.sql` from the test-resources</li>
  *     <li>the current Liquibase-migrations (only-office but with-test-data) are performed</li>
- *     <li>a new dump is written to `db/prod-only-office-schema-with-test-data.sql` in the build-directory</li>
+ *     <li>a new dump is written to `db/released-only-office-schema-with-test-data.sql` in the build-directory</li>
  *     <li>an extra Liquibase-changeset (liquibase-migration-test) is applied</li>
  *     <li>it's asserted that the extra changeset got applied</li>
  * </ol>
@@ -58,123 +42,31 @@ import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TE
 @DirtiesContext
 @ActiveProfiles("liquibase-migration-test")
 @Import(LiquibaseConfig.class)
-@Sql(value = "/db/prod-only-office-schema-with-test-data.sql", executionPhase = BEFORE_TEST_CLASS)
+@Sql(value = "/db/released-only-office-schema-with-test-data.sql", executionPhase = BEFORE_TEST_CLASS) // release-schema
 public class LiquibaseCompatibilityIntegrationTest {
 
     private static final String EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION = "hs-global-liquibase-migration-test";
+    private static final int EXPECTED_LIQUIBASE_CHANGELOGS_IN_PROD_SCHEMA_DUMP = 287;
+
+    @Value("${spring.datasource.url}")
+    private String jdbcUrl;
 
     @Autowired
-    private DataSource dataSource;
-
-    @Autowired
-    private Liquibase liquibase;
-
-    @PersistenceContext
-    private EntityManager em;
+    private LiquibaseMigration liquibase;
 
     @Test
     void migrationWorksBasedOnAPreviouslyPopulatedSchema() {
         // check the initial status from the @Sql-annotation
-        final var initialChangeSetCount = assertProdReferenceStatusAfterRestore();
+        final var initialChangeSetCount = liquibase.assertReferenceStatusAfterRestore(
+                EXPECTED_LIQUIBASE_CHANGELOGS_IN_PROD_SCHEMA_DUMP, EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
 
         // run the current migrations and dump the result to the build-directory
-        runLiquibaseMigrationsWithContexts("only-office", "with-test-data");
-        dumpTo(new File("build/db/prod-only-office-schema-with-test-data.sql"));
+        liquibase.runWithContexts("only-office", "with-test-data");
+        PostgresTestcontainer.dump(jdbcUrl, new File("build/db/released-only-office-schema-with-test-data.sql"));
 
         // then add another migration and assert if it was applied
-        runLiquibaseMigrationsWithContexts("liquibase-migration-test");
-        assertThatCurrentMigrationsGotApplied(initialChangeSetCount);
-    }
-
-    private int assertProdReferenceStatusAfterRestore() {
-        final var schemas = singleColumnSqlQuery("SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname='public'");
-        assertThat(schemas).containsExactly("databasechangelog", "databasechangeloglock");
-
-        final var liquibaseScripts1 = singleColumnSqlQuery("SELECT * FROM public.databasechangelog");
-        assertThat(liquibaseScripts1).hasSizeGreaterThan(285);
-        assertThat(liquibaseScripts1).doesNotContain(EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
-        final var initialChangeSetCount = liquibaseScripts1.size();
-        return initialChangeSetCount;
-    }
-
-    private void assertThatCurrentMigrationsGotApplied(final int initialChangeSetCount) {
-        final var liquibaseScripts = singleColumnSqlQuery("SELECT id FROM public.databasechangelog");
-        assertThat(liquibaseScripts).hasSizeGreaterThan(initialChangeSetCount);
-        assertThat(liquibaseScripts).contains(EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
-    }
-
-    @SneakyThrows
-    private void dumpTo(final File targetFileName) {
-        makeDir(targetFileName.getParentFile());
-
-        final var jdbcDatabaseContainer = getJdbcDatabaseContainer();
-
-        final var sqlDumpFile = new File(targetFileName.getParent(), "." + targetFileName.getName());
-        final var pb = new ProcessBuilder(
-                "pg_dump", "--column-inserts", "--disable-dollar-quoting",
-                "--host=" + jdbcDatabaseContainer.getHost(),
-                "--port=" + jdbcDatabaseContainer.getFirstMappedPort(),
-                "--username=" + jdbcDatabaseContainer.getUsername() ,
-                "--dbname=" + jdbcDatabaseContainer.getDatabaseName(),
-                "--file=" + sqlDumpFile.getCanonicalPath()
-        );
-        pb.environment().put("PGPASSWORD", jdbcDatabaseContainer.getPassword());
-
-        final var process = pb.start();
-        int exitCode = process.waitFor();
-        final var stderr = new BufferedReader(new InputStreamReader(process.getErrorStream()))
-                .lines().collect(Collectors.joining("\n"));
-        assertThat(exitCode).describedAs(stderr).isEqualTo(0);
-
-        final var header = """
-              -- =================================================================================
-              -- Generated reference-SQL-dump (hopefully of latest prod-release).
-              -- See: net.hostsharing.hsadminng.hs.migration.LiquibaseCompatibilityIntegrationTest
-              -- ---------------------------------------------------------------------------------
-              
-              --
-              -- Explicit pre-initialization because we cannot use `pg_dump --create ...`
-              -- because the database is already created by Testcontainers.
-              --
-              
-              CREATE ROLE postgres;
-              CREATE ROLE admin;
-              CREATE ROLE restricted;
-
-              """;
-        writeStringToFile(targetFileName, header, UTF_8, false); // false = overwrite
-
-        write(targetFileName, readFileToString(sqlDumpFile, UTF_8), UTF_8, true);
-
-        assertThat(sqlDumpFile.delete()).describedAs(sqlDumpFile + " cannot be deleted");
-    }
-
-    private void makeDir(final File dir) {
-        assertThat(!dir.exists() || dir.isDirectory()).describedAs(dir + " does exist, but is not a directory").isTrue();
-        assertThat(dir.isDirectory() || dir.mkdirs()).describedAs(dir + " cannot be created").isTrue();
-    }
-
-    @SneakyThrows
-    private void runLiquibaseMigrationsWithContexts(final String... contexts) {
-        liquibase.update(
-                new liquibase.Contexts(contexts),
-                new liquibase.LabelExpression());
-    }
-
-    private List<String> singleColumnSqlQuery(final String sql) {
-        //noinspection unchecked
-        final var rows = (List<Object>) em.createNativeQuery(sql).getResultList();
-        return rows.stream().map(Objects::toString).toList();
-    }
-
-    @SneakyThrows
-    private static JdbcDatabaseContainer<?> getJdbcDatabaseContainer() {
-        final var getContainerMethod = ContainerDatabaseDriver.class.getDeclaredMethod("getContainer", String.class);
-        getContainerMethod.setAccessible(true);
-
-        @SuppressWarnings("rawtypes")
-        final var container = (JdbcDatabaseContainer) getContainerMethod.invoke(null,
-                "jdbc:tc:postgresql:15.5-bookworm:///liquibaseMigrationTestTC");
-        return container;
+        liquibase.runWithContexts("liquibase-migration-test");
+        liquibase.assertThatCurrentMigrationsGotApplied(
+                initialChangeSetCount, EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/migration/LiquibaseConfig.java

@@ -1,28 +1,27 @@
 package net.hostsharing.hsadminng.hs.migration;
 
-import liquibase.Liquibase;
 import liquibase.database.DatabaseFactory;
 import liquibase.database.jvm.JdbcConnection;
-import liquibase.resource.ClassLoaderResourceAccessor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Profile;
 
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.PersistenceContext;
 import javax.sql.DataSource;
 
 @Configuration
-@Profile("liquibase-migration-test")
+@Profile({"liquibase-migration", "liquibase-migration-test"})
 public class LiquibaseConfig {
 
+    @PersistenceContext
+    private EntityManager em;
+
     @Bean
-    public Liquibase liquibase(DataSource dataSource) throws Exception {
+    public LiquibaseMigration liquibase(DataSource dataSource) throws Exception {
         final var connection = dataSource.getConnection();
         final var database = DatabaseFactory.getInstance()
                 .findCorrectDatabaseImplementation(new JdbcConnection(connection));
-        return new Liquibase(
-                "db/changelog/db.changelog-master.yaml", // Path to your Liquibase changelog
-                new ClassLoaderResourceAccessor(),
-                database
-        );
+        return new LiquibaseMigration(em, "db/changelog/db.changelog-master.yaml", database);
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/migration/LiquibaseMigration.java

@@ -0,0 +1,55 @@
+package net.hostsharing.hsadminng.hs.migration;
+
+import liquibase.Liquibase;
+import liquibase.database.Database;
+import liquibase.resource.ClassLoaderResourceAccessor;
+import lombok.SneakyThrows;
+
+import jakarta.persistence.EntityManager;
+import java.util.List;
+import java.util.Objects;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class LiquibaseMigration extends Liquibase {
+
+    private final EntityManager em;
+
+    public LiquibaseMigration(final EntityManager em, final String changeLogFile, final Database db) {
+        super(changeLogFile, new ClassLoaderResourceAccessor(), db);
+        this.em = em;
+    }
+
+    @SneakyThrows
+    public void runWithContexts(final String... contexts) {
+        update(
+                new liquibase.Contexts(contexts),
+                new liquibase.LabelExpression());
+    }
+
+    public int assertReferenceStatusAfterRestore(
+            final int minExpectedLiquibaseChangelogs,
+            final String expectedChangesetOnlyAfterNewMigration) {
+        final var schemas = singleColumnSqlQuery("SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname='public'");
+        assertThat(schemas).containsExactly("databasechangelog", "databasechangeloglock");
+
+        final var liquibaseScripts = singleColumnSqlQuery("SELECT id FROM public.databasechangelog");
+        assertThat(liquibaseScripts).hasSize(minExpectedLiquibaseChangelogs);
+        assertThat(liquibaseScripts).doesNotContain(expectedChangesetOnlyAfterNewMigration);
+        return liquibaseScripts.size();
+    }
+
+    public void assertThatCurrentMigrationsGotApplied(
+            final int initialChangeSetCount,
+            final String expectedChangesetOnlyAfterNewMigration) {
+        final var liquibaseScripts = singleColumnSqlQuery("SELECT id FROM public.databasechangelog");
+        assertThat(liquibaseScripts).hasSizeGreaterThan(initialChangeSetCount);
+        assertThat(liquibaseScripts).contains(expectedChangesetOnlyAfterNewMigration);
+    }
+
+    private List<String> singleColumnSqlQuery(final String sql) {
+        //noinspection unchecked
+        final var rows = (List<Object>) em.createNativeQuery(sql).getResultList();
+        return rows.stream().map(Objects::toString).toList();
+    }
+}

src/test/java/net/hostsharing/hsadminng/hs/migration/PostgresTestcontainer.java

@@ -0,0 +1,81 @@
+package net.hostsharing.hsadminng.hs.migration;
+
+import lombok.SneakyThrows;
+import org.testcontainers.containers.JdbcDatabaseContainer;
+import org.testcontainers.jdbc.ContainerDatabaseDriver;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStreamReader;
+import java.util.stream.Collectors;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.apache.commons.io.FileUtils.readFileToString;
+import static org.apache.commons.io.FileUtils.write;
+import static org.apache.commons.io.FileUtils.writeStringToFile;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class PostgresTestcontainer {
+
+    @SneakyThrows
+    public static void dump(final String jdbcUrl, final File targetFileName) {
+        makeDir(targetFileName.getParentFile());
+
+        final var jdbcDatabaseContainer = getJdbcDatabaseContainer(jdbcUrl);
+
+        final var sqlDumpFile = new File(targetFileName.getParent(), "." + targetFileName.getName());
+        final var pb = new ProcessBuilder(
+                "pg_dump", "--column-inserts", "--disable-dollar-quoting",
+                "--host=" + jdbcDatabaseContainer.getHost(),
+                "--port=" + jdbcDatabaseContainer.getFirstMappedPort(),
+                "--username=" + jdbcDatabaseContainer.getUsername() ,
+                "--dbname=" + jdbcDatabaseContainer.getDatabaseName(),
+                "--file=" + sqlDumpFile.getCanonicalPath()
+        );
+        pb.environment().put("PGPASSWORD", jdbcDatabaseContainer.getPassword());
+
+        final var process = pb.start();
+        int exitCode = process.waitFor();
+        final var stderr = new BufferedReader(new InputStreamReader(process.getErrorStream()))
+                .lines().collect(Collectors.joining("\n"));
+        assertThat(exitCode).describedAs(stderr).isEqualTo(0);
+
+        final var header = """
+              -- =================================================================================
+              -- Generated reference-SQL-dump (hopefully of latest prod-release).
+              -- See: net.hostsharing.hsadminng.hs.migration.LiquibaseCompatibilityIntegrationTest
+              -- ---------------------------------------------------------------------------------
+              
+              --
+              -- Explicit pre-initialization because we cannot use `pg_dump --create ...`
+              -- because the database is already created by Testcontainers.
+              --
+              
+              CREATE ROLE postgres;
+              CREATE ROLE admin;
+              CREATE ROLE restricted;
+
+              """;
+        writeStringToFile(targetFileName, header, UTF_8, false); // false = overwrite
+
+        write(targetFileName, readFileToString(sqlDumpFile, UTF_8), UTF_8, true);
+
+        assertThat(sqlDumpFile.delete()).describedAs(sqlDumpFile + " cannot be deleted");
+    }
+
+    private static void makeDir(final File dir) {
+        assertThat(!dir.exists() || dir.isDirectory()).describedAs(dir + " does exist, but is not a directory").isTrue();
+        assertThat(dir.isDirectory() || dir.mkdirs()).describedAs(dir + " cannot be created").isTrue();
+    }
+
+    @SneakyThrows
+    private static JdbcDatabaseContainer<?> getJdbcDatabaseContainer(final String jdbcUrl) {
+        // TODO.test: check if, in the future, there is a better way to access auto-created Testcontainers
+        final var getContainerMethod = ContainerDatabaseDriver.class.getDeclaredMethod("getContainer", String.class);
+        getContainerMethod.setAccessible(true);
+
+        @SuppressWarnings("rawtypes")
+        final var container = (JdbcDatabaseContainer) getContainerMethod.invoke(null, jdbcUrl);
+        return container;
+    }
+}