Java: Load .env from parent directories

Author: pstadermann

java/src/test/java/de/gdata/test/integration/RealApiIntegrationTests.java

@@ -6,6 +6,7 @@
 import static org.testng.AssertJUnit.assertEquals;
 
 import java.io.ByteArrayInputStream;
+import java.io.File;
 import java.io.IOException;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -16,6 +17,7 @@
 import java.time.format.DateTimeFormatter;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
+import java.util.Optional;
 
 import org.jetbrains.annotations.NotNull;
 import org.junit.jupiter.api.AfterAll;
@@ -41,11 +43,35 @@
 import io.github.cdimascio.dotenv.Dotenv;
 
 public class RealApiIntegrationTests {
-    private static final Dotenv dotenv = Dotenv.configure()
-            .ignoreIfMissing()
-            .load();
+    private static final Dotenv dotenv = getDotenv();
     private static Vaas vaas;
 
+    private static Dotenv getDotenv() {
+        var dotenv = Dotenv.configure()
+            .ignoreIfMissing();
+
+        Optional<File> envFile = findFile(".env");
+
+        if (envFile.isPresent()) {
+            var directory = envFile.get().getParent();
+            dotenv.directory(directory);
+        }
+
+        return dotenv.load();
+    }
+
+    private static Optional<File> findFile(String name) {
+        File currentDirectory = new File(System.getProperty("user.dir"));
+        File file = new File(currentDirectory, name);
+
+        while (!file.exists() && currentDirectory.getParentFile() != null) {
+            currentDirectory = currentDirectory.getParentFile();
+            file = new File(currentDirectory, name);
+        }
+
+        return file.exists() ? Optional.of(file) : Optional.empty();
+    }
+
     @BeforeAll
     public static void setUpAll() throws URISyntaxException, InterruptedException, IOException, ExecutionException,
             TimeoutException, VaasAuthenticationException {