feature/test-liquibase-migration-from-a-prod-dump (#152)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/152
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

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

@@ -3,7 +3,7 @@
 
 -- ============================================================================
 -- NUMERIC-HASH-FUNCTIONS
---changeset michael.hoennig:hash endDelimiter:--//
+--changeset michael.hoennig:hash runOnChange:true validCheckSum:ANY endDelimiter:--//
 -- ----------------------------------------------------------------------------
 
 do $$

src/main/resources/db/changelog/1-rbac/1050-rbac-base.sql

@@ -870,18 +870,23 @@ $$;
 
 
 -- ============================================================================
---changeset michael.hoennig:rbac-base-PGSQL-ROLES context:!external-db endDelimiter:--//
+--changeset michael.hoennig:rbac-base-PGSQL-ROLES runOnChange:true validCheckSum:ANY context:!external-db endDelimiter:--//
 -- ----------------------------------------------------------------------------
 
 do $$
     begin
         if '${HSADMINNG_POSTGRES_ADMIN_USERNAME}'='admin' then
-            create role admin;
+            if not exists (select from pg_catalog.pg_roles where rolname = 'admin') then
+                create role admin;
+            end if;
             grant all privileges on all tables in schema public to admin;
         end if;
 
         if '${HSADMINNG_POSTGRES_RESTRICTED_USERNAME}'='restricted' then
-            create role restricted;
+            if not exists (select from pg_catalog.pg_roles where rolname = 'restricted') then
+                create role restricted;
+            end if;
+
             grant all privileges on all tables in schema public to restricted;
         end if;
     end $$;

src/test/java/net/hostsharing/hsadminng/config/CasAuthenticationFilterIntegrationTest.java

@@ -17,6 +17,7 @@ import static net.hostsharing.hsadminng.config.HttpHeadersBuilder.headers;
 import static org.apache.commons.lang3.RandomStringUtils.randomAlphanumeric;
 import static org.assertj.core.api.Assertions.assertThat;
 import static com.github.tomakehurst.wiremock.client.WireMock.*;
+
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
 @TestPropertySource(properties = {"server.port=0", "hsadminng.cas.server=http://localhost:8088/cas"})
 @ActiveProfiles("wiremock") // IMPORTANT: To test prod config, do not use test profile!

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

@@ -0,0 +1,136 @@
+package net.hostsharing.hsadminng.hs.migration;
+
+import liquibase.Liquibase;
+import liquibase.exception.LiquibaseException;
+import net.hostsharing.hsadminng.context.Context;
+import net.hostsharing.hsadminng.rbac.test.JpaAttempt;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+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.test.annotation.DirtiesContext;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.jdbc.Sql;
+
+import javax.sql.DataSource;
+import java.util.List;
+import java.util.Objects;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TEST_CLASS;
+
+// TODO.impl: The reference-SQL-dump-generation needs to be automated
+// BLOG: Liquibase-migration-test (not before the reference-SQL-dump-generation is simplified)
+// HOWTO: generate the prod-reference-SQL-dump during a prod-release
+
+/**
+ * Tests, if the Liquibase scripts can be applied to a database ionitialized with schemas
+ * and test-data from a previous version.
+ *
+ * <p>The test needs a dump, ideally from the version of the lastest prod-release:</p>
+ *
+ * <ol>
+ * <li>clean the database:<br/>
+ * <code>pg-sql-reset</code>
+ * </li>
+ *
+ * <li>restote the database from latest dump</br>
+ *  <pre><code>
+ *      docker exec -i hsadmin-ng-postgres psql -U postgres postgres \
+ *          <src/test/resources/db/prod-only-office-schema-with-test-data.sql
+ *  </code></pre>
+ * </li>
+ *
+ * <li>run the missing migrations:</br>
+ * <code>gw bootRun --args='--spring.profiles.active=only-office'</code>
+ * </li>
+ *
+ * <li>create the reference-schema SQL-file with some initializations:</li>
+ * <pre><code>
+ * cat >src/test/resources/db/prod-only-office-schema-with-test-data.sql <<EOF
+ * -- =================================================================================
+ * -- 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;
+ * GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO admin;
+ * CREATE ROLE restricted;
+ * GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO restricted;
+ *
+ * EOF
+ * </code></pre>
+ * </li>
+ *
+ * <li>add the dump to that reference-schema SQL-file:</p>
+ * <pre><code>docker exec -i hsadmin-ng-postgres /usr/bin/pg_dump \
+ * --column-inserts --disable-dollar-quoting -U postgres postgres \
+ * >>src/test/resources/db/prod-only-office-schema-with-test-data.sql
+ * </code></pre>
+ * </li>
+ * </ol>
+ *
+ * <p>The generated dump has to be committed to git and will be used in future test-runs
+ * until it gets replaced at the next release.</p>
+ */
+@Tag("officeIntegrationTest")
+@DataJpaTest(properties = {
+        "spring.liquibase.enabled=false" // @Sql should go first, Liquibase will be initialized programmatically
+})
+@DirtiesContext
+@ActiveProfiles("liquibase-migration-test")
+@Import({ Context.class, JpaAttempt.class, LiquibaseConfig.class })
+@Sql(value = "/db/prod-only-office-schema-with-test-data.sql", executionPhase = BEFORE_TEST_CLASS)
+public class LiquibaseCompatibilityIntegrationTest extends CsvDataImport {
+
+    private static final String EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION = "hs-hosting-SCHEMA";
+    private static int initialChangeSetCount = 0;
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Autowired
+    private Liquibase liquibase;
+
+    @BeforeEach
+    public void setup() throws Exception {
+        assertThatDatabaseIsInitialized();
+        runLiquibaseMigrations();
+    }
+
+    @Test
+    void test() {
+        final var liquibaseScripts = singleColumnSqlQuery("SELECT id FROM public.databasechangelog");
+        assertThat(liquibaseScripts).hasSizeGreaterThan(initialChangeSetCount);
+        assertThat(liquibaseScripts).contains(EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
+    }
+
+    private void assertThatDatabaseIsInitialized() {
+        final var schemas = singleColumnSqlQuery("SELECT tablename FROM pg_catalog.pg_tables WHERE schemaname='public'");
+        assertThat(schemas).containsExactly("databasechangelog", "databasechangeloglock");
+
+        final var liquibaseScripts = singleColumnSqlQuery("SELECT * FROM public.databasechangelog");
+        assertThat(liquibaseScripts).hasSizeGreaterThan(285);
+        assertThat(liquibaseScripts).doesNotContain(EXPECTED_CHANGESET_ONLY_AFTER_NEW_MIGRATION);
+        initialChangeSetCount = liquibaseScripts.size();
+    }
+
+    private void runLiquibaseMigrations() throws LiquibaseException {
+        liquibase.update(new liquibase.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();
+    }
+}

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

@@ -0,0 +1,28 @@
+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 javax.sql.DataSource;
+
+@Configuration
+@Profile("liquibase-migration-test")
+public class LiquibaseConfig {
+
+    @Bean
+    public Liquibase 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
+        );
+    }
+}