@Test
public void testStringsTooSmall() {
for (int i = 0; i < 10; i++) {
final HeaderData hd = new HeaderData("test_data", new MemoryResource(new byte[128], i, 128));
StringElement e1 = new StringElement(null, "test string1", hd, 0, 0, 8 * 10 - 1);
StringElement e2 = new StringElement(null, "test string2", hd, 10, 0, 8 * 10 - 1);
StringElement e3 = new StringElement(null, "test string3", hd, 20, 0, 8 * 10 - 1);
String ss1 = "aaaa bb c";
String ss2 = "zeroizing2";
String ss3 = "1234567890";
for (int j = 1; j <= 10; j++) {
String s1 = ss1.substring(0, j);
String s2 = ss2.substring(0, j);
String s3 = ss3.substring(0, j);
e1.setValue(s1);
e2.setValue(s2);
e3.setValue(s3);
check(e1, s1);
check(e2, s2);
check(e3, s3);
e3.setValue(s3);
e2.setValue(s2);
e1.setValue(s1);
check(e1, s1);
check(e2, s2);
check(e3, s3);
}
}
}
@Test
public void testSetChars() {
final char[] testData = {'A', 'B', '\0', 'C', 'D'};
final MessageData hd = new HeaderData("test_data", new MemoryResource(new byte[5], 0, 5));
final StringElement sut = new StringElement(null, "test string element", hd, 0, 0, 8 * 5 - 1);
assertEquals("Empty string to start", "", sut.getValue());
sut.setChars(testData);
assertEquals("New value is cut off by the null", "AB", sut.getValue());
char[] result = new char[5];
assertEquals("Five bytes in, five bytes back", 5, sut.getChars(result));
assertEquals(
"Exact same array comes back with getChars()",
Arrays.toString(testData),
Arrays.toString(result));
}
@Test
public void testZeroize() {
for (int i = 0; i < 10; i++) {
final HeaderData hd = new HeaderData("test_data", new MemoryResource(new byte[128], i, 128));
StringElement e1 = new StringElement(null, "test string1", hd, 0, 0, 8 * 10 - 1);
StringElement e2 = new StringElement(null, "test string2", hd, 10, 0, 8 * 10 - 1);
StringElement e3 = new StringElement(null, "test string3", hd, 20, 0, 8 * 10 - 1);
String s1 = "aaaa bb c";
String s2 = "zeroizing2";
String s3 = "1234567890";
e1.setValue(s1);
e2.setValue(s2);
e3.setValue(s3);
check(e1, s1);
check(e2, s2);
check(e3, s3);
e2.zeroize();
checkEmpty(e2);
check(e1, s1);
check(e2, "");
check(e3, s3);
e2.setValue(s2);
e1.zeroize();
checkEmpty(e1);
check(e1, "");
check(e2, s2);
check(e3, s3);
e1.setValue(s1);
e3.zeroize();
check(e1, s1);
check(e2, s2);
check(e3, "");
}
}
private void checkEmpty(StringElement elem) {
if (!elem.isEmpty()) {
Assert.assertEquals(elem.getName(), "rmpty", "not empty");
}
}
private void check(StringElement elem, String value) {
if (!elem.getValue().equals(value)) {
Assert.assertEquals(elem.getName(), value, elem.getValue());
}
}