Add the test configuration.

config/db.testing

@@ -0,0 +1,3 @@
+JDBC_URL="jdbc:postgresql://postgres:5432/testdb"
+JDBC_USER=user
+JDBC_PASSWORD=testpassword

src/test/groovy/space/kklochko/jdbc_hospital_example/db/repositories/IndicatorRepositorySpec.groovy

@@ -25,7 +25,7 @@ class IndicatorRepositorySpec extends Specification {
     DataBaseConnection dbc
 
     def setupSpec() {
-        db = (new LoadDataBaseConfigFromEnvFile()).load()
+        db = (new LoadDataBaseConfigFromEnvFile()).load("db.testing")
         dbc = new DataBaseConnection(db)
 
         IndicatorRepository repo = new IndicatorRepository(dbc)