fix: integration test with system properties to simulate non existing…

… config file

src/main/java/software/amazon/event/kafkaconnector/auth/EventBridgeAwsCredentialsProviderFactory.java

@@ -83,7 +83,8 @@ public static AwsCredentialsProvider getAwsCredentialsProvider(EventBridgeSinkCo
     return getStsAssumeRoleCredentialsProvider(config);
   }
 
-  // Temporary workaround until AWS SDK issue is fixed: https://github.com/aws/aws-sdk-java-v2/issues/5635
+  // Temporary workaround until AWS SDK issue is fixed:
+  // https://github.com/aws/aws-sdk-java-v2/issues/5635
   private static ProfileFileSupplier wrappedProfileDefaultSupplier() {
     return () -> {
       try {

src/test/java/software/amazon/event/kafkaconnector/auth/EventBridgeCredentialsProviderFactoryTest.java

@@ -9,6 +9,9 @@
 
 import java.util.HashMap;
 import java.util.Map;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;
 import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
@@ -25,6 +28,12 @@ public class EventBridgeCredentialsProviderFactoryTest {
           "aws.eventbridge.region", "us-east-1",
           "aws.eventbridge.eventbus.arn", "arn:aws:events:us-east-1:000000000000:event-bus/e2e");
 
+  @AfterEach
+  public final void clearSystemProperties(){
+    System.clearProperty("aws.configFile");
+    System.clearProperty("aws.sharedCredentialsFile");
+  }
+
   @Test
   public void shouldUseDefaultAwsCredentialsProvider() {
 
@@ -68,12 +77,21 @@ public void shouldUseAwsCredentialsProviderByProvidedClass() {
   }
 
   @Test
-  //Testing wrapper functionality as a quick fix until the SDK issue is solved: https://github.com/aws/aws-sdk-java-v2/issues/5635
+  // Testing wrapper functionality until the AWS SDK issue is solved:
+  // https://github.com/aws/aws-sdk-java-v2/issues/5635
   public void shouldNotGetSDKClientExceptionWithNull() {
+    //Set path to non-existing full to force null pointer
+    System.setProperty("aws.configFile", "/non/existing/file");
+    System.setProperty("aws.sharedCredentialsFile", "/non/existing/file");
+
     var props = new HashMap<>(commonProps);
-    var provider = EventBridgeAwsCredentialsProviderFactory.getAwsCredentialsProvider(new EventBridgeSinkConfig(props));
+    var provider =
+        EventBridgeAwsCredentialsProviderFactory.getAwsCredentialsProvider(
+            new EventBridgeSinkConfig(props));
     var exception = assertThrows(SdkClientException.class, provider::resolveCredentials);
 
-    assertThat(exception).hasMessageNotContaining("Cannot invoke \"java.nio.file.Path.getFileSystem()\" because \"path\" is null");
+    assertThat(exception)
+        .hasMessageNotContaining(
+            "Cannot invoke \"java.nio.file.Path.getFileSystem()\" because \"path\" is null");
   }
 }