@Test
public void testIgnoredSystemProperties() throws Exception {
EnginePreferences test = new EnginePreferences("test3");
String KEY = "org.esa.snap.test3.key"; // Ignored key, because it does not start with "test3."
try {
assertNull(System.getProperty(KEY));
assertEquals(null, System.getProperty(KEY));
assertEquals(null, test.get(KEY, null));
assertEquals("A", test.get(KEY, "A"));
assertEquals(null, test.getProperties().getProperty(KEY));
System.setProperty(KEY, "E");
assertEquals("E", System.getProperty(KEY)); // System property NOT changed!!!
assertEquals(null, test.get(KEY, null));
assertEquals("A", test.get(KEY, "A"));
assertEquals(null, test.getProperties().getProperty(KEY));
} finally {
System.clearProperty(KEY);
}
}
@Test
public void testRecognizedSystemProperties() throws Exception {
EnginePreferences test = new EnginePreferences("test2");
String KEY = "test2.key"; // Recognized key, because it starts with "test2."
try {
assertNull(System.getProperty(KEY));
test.put(KEY, "B");
assertEquals(null, System.getProperty(KEY));
assertEquals("B", test.get(KEY, null));
assertEquals("B", test.get(KEY, "A"));
assertEquals("B", test.getProperties().getProperty(KEY));
System.setProperty(KEY, "C");
assertEquals("C", System.getProperty(KEY));
assertEquals("C", test.get(KEY, null)); // System property has higher precedence
assertEquals("C", test.get(KEY, "A")); // System property has higher precedence
assertEquals("B", test.getProperties().getProperty(KEY));
test.put(KEY, "D"); // System property will change as well
assertEquals("D", System.getProperty(KEY)); // System property changed!!!
assertEquals("D", test.get(KEY, null));
assertEquals("D", test.get(KEY, "A"));
assertEquals("D", test.getProperties().getProperty(KEY));
} finally {
System.clearProperty(KEY);
}
}
@Test
public void testGetPutRemove() throws Exception {
EnginePreferences test = new EnginePreferences("test");
String KEY = "test.key";
assertEquals(null, test.get(KEY, null));
assertEquals("A", test.get(KEY, "A"));
assertEquals(null, test.getProperties().getProperty(KEY));
test.put(KEY, "B");
assertEquals("B", test.get(KEY, null));
assertEquals("B", test.get(KEY, "A"));
assertEquals("B", test.getProperties().getProperty(KEY));
test.remove(KEY);
assertEquals(null, test.get(KEY, null));
assertEquals("A", test.get(KEY, "A"));
assertEquals(null, test.getProperties().getProperty(KEY));
}