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  package org.apache.cayenne.gen;
  
  import java.io.StringWriter;
  import java.util.Properties;
  
  import org.apache.cayenne.di.DIBootstrap;
  import org.apache.cayenne.di.Injector;
  import org.apache.cayenne.di.spi.DefaultScope;
  import org.apache.velocity.Template;
  import org.apache.velocity.app.VelocityEngine;
  import org.apache.velocity.context.Context;
  import org.junit.Before;
  
  public class ClassGenerationCase {
  
      private VelocityEngine velocityEngine;
  
      private static final Injector injector;
  
      static {
          DefaultScope testScope = new DefaultScope();
          injector = DIBootstrap.createInjector(new CgenCaseModule(testScope), new CgenModule());
      }
  
      @Before
      public void setUp() throws Exception {
          Properties props = new Properties();
  
          props.put("resource.loader", "cayenne");
          props.put("cayenne.resource.loader.class", ClassGeneratorResourceLoader.class.getName());
          props.put("cayenne.resource.loader.cache", "false");
  
          this.velocityEngine = new VelocityEngine();
          this.velocityEngine.init(props);
      }
  
      protected String renderTemplate(String templateName, Context context) throws Exception {
          StringWriter writer = new StringWriter();
  
          Template template = velocityEngine.getTemplate(templateName);
          template.merge(context, writer);
  
          return writer.toString();
      }
  
      public Injector getInjector() {
          return injector;
      }
  }
  