runtime/org.argeo.slc.support.simple/src/main/java/org/argeo/slc/unit/AbstractSpringTestCase.java

   1 package org.argeo.slc.unit;
   2
   3 import java.util.Map;
   4
   5 import junit.framework.TestCase;
   6
   7 import org.apache.commons.logging.Log;
   8 import org.apache.commons.logging.LogFactory;
   9 import org.argeo.slc.SlcException;
  10 import org.springframework.beans.factory.BeanFactoryUtils;
  11 import org.springframework.beans.factory.ListableBeanFactory;
  12 import org.springframework.context.ConfigurableApplicationContext;
  13 import org.springframework.context.support.ClassPathXmlApplicationContext;
  14
  15 /** Helper for tests using a Spring application co,text. */
  16 public abstract class AbstractSpringTestCase extends TestCase {
  17         protected final Log log = LogFactory.getLog(getClass());
  18         private ConfigurableApplicationContext context;
  19
  20         /**
  21          * Gets (and create if necessary) the application context to use. Default
  22          * implementation uses a class path xml application context and calls
  23          * {@link #getApplicationContextLocation()}.
  24          */
  25         protected ConfigurableApplicationContext getContext() {
  26                 if (context == null) {
  27                         context = new ClassPathXmlApplicationContext(
  28                                         getApplicationContextLocation());
  29                         if (getIsStartContext())
  30                                 context.start();
  31                 }
  32                 return context;
  33         }
  34
  35         /** Whether the context should be started after being created. */
  36         protected Boolean getIsStartContext() {
  37                 return false;
  38         }
  39
  40         /** Returns a bean from the underlying context */
  41         @SuppressWarnings(value = { "unchecked" })
  42         protected <T> T getBean(String beanId) {
  43                 return (T) getContext().getBean(beanId);
  44         }
  45
  46         protected <T> T getBean(Class<? extends T> clss) {
  47                 T bean = loadSingleFromContext(getContext(), clss);
  48                 if (bean == null) {
  49                         throw new SlcException("Cannot retrieve a unique bean of type "
  50                                         + clss);
  51                 } else {
  52                         return bean;
  53                 }
  54         }
  55
  56         /**
  57          * Th location of the application to load. The default implementation
  58          * returns <i>applicationContext.xml</i> found in the same package as the
  59          * test.
  60          */
  61         protected String getApplicationContextLocation() {
  62                 return inPackage("applicationContext.xml");
  63         }
  64
  65         /**
  66          * Prefixes the package of the class after converting the '.' to '/' in
  67          * order to have a resource path.
  68          */
  69         protected String inPackage(String suffix) {
  70                 String prefix = getClass().getPackage().getName().replace('.', '/');
  71                 return prefix + '/' + suffix;
  72         }
  73
  74         @SuppressWarnings(value = { "unchecked" })
  75         protected <T> T loadSingleFromContext(ListableBeanFactory context,
  76                         Class<T> clss) {
  77                 Map<String, T> beans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
  78                                 context, clss, false, false);
  79                 if (beans.size() == 1) {
  80                         return beans.values().iterator().next();
  81                 } else if (beans.size() > 1) {
  82                         if (log.isDebugEnabled()) {
  83                                 log
  84                                                 .debug(("Found more that on bean for type " + clss
  85                                                                 + ": " + beans.keySet()));
  86                         }
  87                         return null;
  88                 } else {
  89                         return null;
  90                 }
  91         }
  92
  93 }