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

voidassertInstanceOf(Object obj, Class classType)
assert Instance Of 
if (obj == null) {
    throw new IllegalArgumentException("Argument is null!");
if (!classType.isInstance(obj)) {
    throw new IllegalArgumentException("Argument should be instance of " + classType.getName()
            + ", but now is " + obj.getClass().getName());
voidassertInstanceOf(Object obj, Class expClass)
Checks if the passed object is of the class specified, null values are ignored 
if (obj == null)
    return;
if (!(expClass.isAssignableFrom(obj.getClass()))) {
    throw new AssertionError(
            "Expected class: " + expClass.getName() + " but object has class: " + obj.getClass().getName());
voidassertInstanceOf(Object object, Class expectClass)
assert Instance Of 
boolean b = expectClass.isInstance(object);
if (b == false) {
    throw new AssertionError(String.format("The expect class is %s, but actually %s.",
            expectClass.getName(), object.getClass().getName()));
voidassertIntegerGreaterThanZero(long number, String name)
Check if the integer is greater than zero. 
if (number <= 0) {
    throw new IllegalArgumentException(name + " must be positive.");
voidassertIntegerNotNegative(String message, int num)
assert Integer Not Negative 
if (num < 0) {
    throw new IllegalArgumentException(message);
voidassertion(boolean isTrue, String reason)
If false, throw an assertException, and give a reason 
if (!isTrue) {
    throw new RuntimeException(reason);
voidassertion(boolean value)
assertion 
if (!value)
    throw new RuntimeException("Assertion failed.");
Stringassertion(String operator, String expr)
assertion 
return "(assert (" + operator + " " + toBool(expr) + "))\n";
RuntimeExceptionassertionError(String message, Object... args)
Returns a RuntimeException with a formatted error message. 
return assertionError(null, message, args);
AssertionErrorassertionError(String message, Throwable cause)
assertion Error 
AssertionError error = new AssertionError(message);
error.initCause(cause);
throw error;