private void somethingIsWrongWithGenerateHash() {
String randomString = "";
int randomLength = (int) (Math.random() * 40);
for (int i = 0; i < randomLength; i++) {
randomString += (char) (Math.random() * Character.MAX_VALUE);
}
try {
stringSearching.generateHash(null, 0);
fail("Null character sequence did not throw exception.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message", e.getMessage());
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
try {
stringSearching.generateHash(randomString, (int) (Math.random() * Integer.MIN_VALUE));
fail("Negative length did not throw exception.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!", e.getMessage());
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
try {
stringSearching.generateHash(randomString, randomLength + (int) (Math.random() * 5));
fail("length greater than randomString.length() did not throw" + "Exception");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
}
private void somethingIsWrongWithBuildFailureTable() {
try {
stringSearching.buildFailureTable(null);
fail("Didn't throw exception for null pattern.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
}
private void somethingIsWrongWithUpdateHash() {
try {
stringSearching.updateHash(1, (int) (Math.random() * Integer.MIN_VALUE), 'c', 'a');
fail("Random negative length did not throw Exception");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
}
private void somethingIsWrongWithBoyerMoore() {
try {
stringSearching.boyerMoore(null, mattText);
fail("Didn't throw exception for null pattern.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
try {
stringSearching.boyerMoore("", mattText);
fail("Didn't throw exception for empty pattern.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
try {
stringSearching.boyerMoore(matt, null);
fail("Didn't throw exception for null text.");
} catch (IllegalArgumentException e) {
assertNotNull("IllegalArgumentException needs a message!");
assertTrue("Make sure the message is useful.", e.getMessage().length() > 10);
}
}