### Question:
PropertiesLoaderUtil { public Double getDouble(String key) { String value = getValue(key); if (value == null) { throw new NoSuchElementException(); } return Double.valueOf(value); } PropertiesLoaderUtil(String... resourcesPath); String getValue(String key); String getProperty(String key); String getProperty(String key, String defaultValue); Integer getInteger(String key); Integer getInteger(String key, Integer defaultValue); Double getDouble(String key); Double getDouble(String key, Integer defaultValue); Boolean getBoolean(String key); Boolean getBoolean(String key, boolean defaultValue);  }### Answer:
@Test public void testGetDouble() throws Exception { }