feat(bridge): Config PostgreSQL testcontainer for test

bpdm-bridge-dummy/src/test/kotlin/com/catenax/bpdm/bridge/dummy/ApplicationTests.kt

@@ -19,10 +19,15 @@
 
 package com.catenax.bpdm.bridge.dummy
 
+import com.catenax.bpdm.bridge.dummy.util.PostgreSQLContextInitializer
 import org.junit.jupiter.api.Test
 import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.context.ActiveProfiles
+import org.springframework.test.context.ContextConfiguration
 
-@SpringBootTest
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@ActiveProfiles("test")
+@ContextConfiguration(initializers = [PostgreSQLContextInitializer::class])
 class ApplicationTests {
 
 	@Test

bpdm-bridge-dummy/src/test/kotlin/com/catenax/bpdm/bridge/dummy/util/PostgreSQLContextInitializer.kt

@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2021,2023 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+package com.catenax.bpdm.bridge.dummy.util
+
+import org.springframework.boot.test.util.TestPropertyValues
+import org.springframework.context.ApplicationContextInitializer
+import org.springframework.context.ConfigurableApplicationContext
+import org.testcontainers.containers.PostgreSQLContainer
+
+/**
+ * When used on a spring boot test, starts a singleton postgres db container that is shared between all integration tests.
+ */
+class PostgreSQLContextInitializer : ApplicationContextInitializer<ConfigurableApplicationContext> {
+    companion object {
+        val postgreSQLContainer = PostgreSQLContainer("postgres:13.2")
+    }
+
+    override fun initialize(applicationContext: ConfigurableApplicationContext) {
+        postgreSQLContainer.start()
+        TestPropertyValues.of(
+            "spring.datasource.url=${postgreSQLContainer.jdbcUrl}",
+            "spring.datasource.username=${postgreSQLContainer.username}",
+            "spring.datasource.password=${postgreSQLContainer.password}"
+        ).applyTo(applicationContext.environment)
+    }
+}