Java Utililty Methods Assert

List of utility methods to do Assert

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Description

The list of methods to do Assert are organized into topic(s).

Method

voidassertContains(String needle, String haystack)
assert Contains 
if (haystack.contains(needle))
    return;
throw new AssertionError("The string '" + haystack + "' does not contain '" + needle + "'.");
voidassertDescriptorName(String key)
assert Descriptor Name 
assert key != null;
assert key.indexOf(GROUP_SEPARATOR) == -1 : key + " contains invalid chars";
assert key.indexOf(GROUPS_SEPARATOR) == -1 : key + " contains invalid chars";
assert key.indexOf(GROUP_VALUE_SEPARATOR) == -1 : key + " contains invalid chars";
assert !key.contains("=") : key + " contains invalid chars";
assert !key.contains("'") : key + " contains invalid chars";
assert !key.contains("\"") : key + " contains invalid chars";
voidassertDidNotThrow(final Runnable r)
If Java assertions are enabled, execute the given Runnable , and assert(false) if it throws any Throwable .
Can be used for asserting upon stuff which does not return false upon error but throws: A regular Java assert could only consume boolean-returning functions.

The Throwable will be passed as message to the assert, it will not be thrown.
boolean execute = false;
assert (execute = true);
if (execute) {
    try {
        r.run();
    } catch (Throwable t) {
        assert (false) : t;
voidassertDifferentInstance(final Object o1, final Object o2)
assert Different Instance 
if (o1 == o2) {
    throw new AssertionError("The compared objects are the same instance of a class");
voidassertDotted(String name)
assert Dotted 
if (name.indexOf("/") != -1) {
    throw new IllegalStateException("Expected a dotted name but was passed " + name);
intassertEntryCount(final long entryCount)
Dynamic sharding operations are not currently supported for indices with more than MAX_INT tuples. 
if (entryCount >= Integer.MAX_VALUE)
    throw new UnsupportedOperationException("More than GT MAX_INT tuples: n=" + entryCount);
return (int) entryCount;
voidassertEnvVarPresent(String envVarKey, String errorMessage)
assert Env Var Present 
if (System.getenv(envVarKey) == null) {
    throw new IllegalArgumentException(errorMessage);
voidassertException(Runnable task, Class clazz)
assert Exception 
try {
    task.run();
    throw new AssertionError(String.format("expected exception of type %s", clazz.getSimpleName()));
} catch (Exception ex) {
    if (!ex.getClass().isAssignableFrom(clazz)) {
        new AssertionError(String.format("expected exception of type %s but found exception of type %s",
                clazz.getCanonicalName(), ex.getClass().getCanonicalName()));
voidassertFact(boolean truth, String failure)
assert Fact 
if (!truth) {
    System.err.println("assertion failed: " + failure);
    System.exit(1);
voidassertFailed(Object expression, Object message)
assert Failed 
if (message == null || "".equals(message)) {
    throw new AssertionError("Expression: " + expression);
} else {
    throw new AssertionError("" + message + ". Expression: " + expression);