chore: Fix test requiring ProjectId

Author: lqiu96

src/test/java/com/google/cloud/logging/logback/LoggingAppenderTest.java

@@ -62,7 +62,7 @@
 public class LoggingAppenderTest {
   private static final String PROJECT_ID = "test-project";
   private static final String CRED_FILE_PROJECT_ID = "project-12345";
-  private static final String OVERRIDED_PROJECT_ID = "some-project-id";
+  private static final String OVERRIDDEN_PROJECT_ID = "some-project-id";
   private static final String DUMMY_CRED_FILE_PATH =
       "src/test/java/com/google/cloud/logging/logback/dummy-credentials.json";
   private static final Payload.JsonPayload JSON_PAYLOAD =
@@ -295,6 +295,9 @@ public void testMdcValuesAreConvertedToLabels() {
   public void testCreateLoggingOptionsWithValidCredentials() {
     LoggingAppender appender = new LoggingAppender();
     appender.setCredentials(GoogleCredentials.newBuilder().build());
+    // ServiceOptions requires a projectId to be set. Normally this is determined by the
+    // GoogleCredentials (Credential set above is a dummy value with no ProjectId).
+    appender.setLogDestinationProjectId(PROJECT_ID);
     appender.getLoggingOptions();
   }
 
@@ -325,8 +328,8 @@ public void testCreateLoggingOptionsWithDestination() {
     // Try to build LoggingOptions with file based credentials.
     LoggingAppender appender = new LoggingAppender();
     appender.setCredentialsFile(DUMMY_CRED_FILE_PATH);
-    appender.setLogDestinationProjectId(OVERRIDED_PROJECT_ID);
-    assertThat(appender.getLoggingOptions().getProjectId()).isEqualTo(OVERRIDED_PROJECT_ID);
+    appender.setLogDestinationProjectId(OVERRIDDEN_PROJECT_ID);
+    assertThat(appender.getLoggingOptions().getProjectId()).isEqualTo(OVERRIDDEN_PROJECT_ID);
   }
 
   private LoggingEvent createLoggingEvent(Level level, long timestamp) {