content: package com.alibaba.langengine.perplexity.sdk;
  
  import com.alibaba.langengine.perplexity.PerplexityConfiguration;
  import org.junit.jupiter.api.Test;
  
  /**
   * Debug test to check configuration loading
   */
  public class ConfigurationDebugTest {
      
      @Test
      void debugConfigurationLoading() {
          System.out.println("=== Configuration Debug Info ===");
          System.out.println("API Key from config: '" + PerplexityConfiguration.PERPLEXITY_API_KEY + "'");
          System.out.println("API Key is null: " + (PerplexityConfiguration.PERPLEXITY_API_KEY == null));
          System.out.println("API Key is empty: " + (PerplexityConfiguration.PERPLEXITY_API_KEY != null && PerplexityConfiguration.PERPLEXITY_API_KEY.trim().isEmpty()));
          System.out.println("API Key length: " + (PerplexityConfiguration.PERPLEXITY_API_KEY != null ? PerplexityConfiguration.PERPLEXITY_API_KEY.length() : "null"));
          
          // Check if it contains default values
          if (PerplexityConfiguration.PERPLEXITY_API_KEY != null) {
              System.out.println("Contains 'your_perplexity_api_key_here': " + PerplexityConfiguration.PERPLEXITY_API_KEY.equals("your_perplexity_api_key_here"));
              System.out.println("Contains 'your_test_api_key_here': " + PerplexityConfiguration.PERPLEXITY_API_KEY.equals("your_test_api_key_here"));
              System.out.println("Starts with 'pplx-': " + PerplexityConfiguration.PERPLEXITY_API_KEY.startsWith("pplx-"));
          }
          
          System.out.println("Base URL: " + PerplexityConfiguration.PERPLEXITY_API_URL);
          System.out.println("=======================");
      }
  }