@Test
public void testInitWithEmptyTagable() throws Exception {

    global = new Global();
    // Method to test
    global.init(tagable);
    // Tests
    assertThat(global.containTagKey(TagD.get(Tag.StudyInstanceUID))).isTrue();
    assertThat(global.getTagValue(TagD.get(Tag.StudyInstanceUID))).isNotNull();
}