public void testByteArrays() {
byte[] test1 = new byte[5];
byte[] test2 = new byte[8];
ReflectionSingleObjectSizer referenceSizer = new ReflectionSingleObjectSizer();
assertEquals(referenceSizer.sizeof(test1), WellKnownClassSizer.sizeof(test1));
assertEquals(referenceSizer.sizeof(test2), WellKnownClassSizer.sizeof(test2));
assertEquals(0, WellKnownClassSizer.sizeof(new Object()));
}
public void testStrings() {
String test1 = "123";
String test2 = "012345678";
ReflectionSingleObjectSizer referenceSizer = new ReflectionSingleObjectSizer();
test1.toCharArray();
// The size of a string varies based on the JDK version. With 1.7.0_06
// a couple of fields were removed. So just measure the size of an empty string.
String emptyString = "";
int emptySize =
ObjectSizer.SIZE_CLASS_ONCE.sizeof(emptyString)
- ObjectSizer.SIZE_CLASS_ONCE.sizeof(new char[0]);
assertEquals(emptySize + roundup(OBJECT_SIZE + 4 + 3 * 2), WellKnownClassSizer.sizeof(test1));
assertEquals(emptySize + roundup(OBJECT_SIZE + 4 + 9 * 2), WellKnownClassSizer.sizeof(test2));
}
