monitoring I18N translations

app/build.xml

@@ -76,7 +76,7 @@
       <fileset dir="test" includes="**/*.txt" />
     </copy>
 
-    <junit printsummary="yes" haltonfailure="yes">
+    <junit printsummary="yes">
       <classpath>
         <pathelement location="bin"/>
         <pathelement location="test-bin"/>

app/test/processing/app/I18NTest.java

@@ -0,0 +1,82 @@
+package processing.app;
+
+import org.junit.Test;
+
+import java.io.*;
+import java.util.*;
+
+import static org.junit.Assert.assertTrue;
+
+public class I18NTest {
+
+  private Set<String> loadAllI18NKeys() throws IOException {
+    Properties properties = new Properties();
+    for (File file : listPropertiesFiles()) {
+      properties.putAll(loadProperties(file));
+    }
+    Set<String> keys = new HashSet<String>();
+    for (Object key : properties.keySet()) {
+      keys.add(key.toString());
+    }
+    return keys;
+  }
+
+  private File[] listPropertiesFiles() {
+    return new File(I18NTest.class.getResource(".").getFile()).listFiles(new FileFilter() {
+      @Override
+      public boolean accept(File file) {
+        return file.isFile() && file.getName().endsWith(".properties");
+      }
+    });
+  }
+
+  private Properties loadProperties(File file) throws IOException {
+    Properties properties = new Properties();
+    InputStream is = null;
+    try {
+      is = new FileInputStream(file);
+      properties.load(is);
+    } finally {
+      if (is != null) {
+        is.close();
+      }
+    }
+    return properties;
+  }
+
+  @Test
+  public void ensureEveryTranslationIsComplete() throws Exception {
+    Set<String> keys = loadAllI18NKeys();
+
+    Map<String, List<String>> missingTranslationsPerFile = new HashMap<String, List<String>>();
+
+    for (File file : listPropertiesFiles()) {
+      Properties properties = loadProperties(file);
+      for (String key : keys) {
+        if (!properties.containsKey(key) || properties.get(key).equals("")) {
+          addMissingTranslation(missingTranslationsPerFile, file, key);
+        }
+      }
+    }
+
+    if (!missingTranslationsPerFile.isEmpty()) {
+      for (Map.Entry<String, List<String>> entry : missingTranslationsPerFile.entrySet()) {
+        System.out.println("Following translations in file " + entry.getKey() + " are missing:");
+        for (String key : entry.getValue()) {
+          System.out.println("==> '" + key + "'");
+        }
+        System.out.println();
+      }
+      assertTrue(false);
+    }
+  }
+
+  private void addMissingTranslation(Map<String, List<String>> missingTranslationsPerFile, File file, String key) {
+    if (!missingTranslationsPerFile.containsKey(file.getName())) {
+      missingTranslationsPerFile.put(file.getName(), new LinkedList<String>());
+    }
+
+    missingTranslationsPerFile.get(file.getName()).add(key);
+  }
+
+}