Class CheckerSupplier<T>

java.lang.Object

util.AbstractChecker<Supplier<T>,CheckerSupplier<T>>

specialized_checkers.lambda.CheckerSupplier<T>

Type Parameters:

T - the type of the result returned by the Supplier

All Implemented Interfaces:

InterfaceChecker<AbstractChecker<Supplier<T>,CheckerSupplier<T>>,Supplier<T>>

public class CheckerSupplier<T>
extends AbstractChecker<Supplier<T>,CheckerSupplier<T>>

A specialized checker for Supplier instances, providing a fluent API for validating function behavior and results. This class allows assertions such as verifying that a function does not throw exceptions, produces expected results, or returns non-null values for given inputs.

Example usage:

     CheckerSupplier<Integer> checker = CheckerSupplier.check(() -> 5)
            .applyWithoutException()
            .producesExpected(5)
            .producesNonNull();
 

See Also:

• Supplier
• AbstractChecker

Field Summary

Fields inherited from class util.AbstractChecker

backObject, exceptionTracker, name, object, saveErrors, stop

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CheckerSupplier(Supplier<T> supplier, String name)	Constructs a new CheckerSupplier with the specified supplier and name.

Method Summary

Modifier and Type	Method	Description
CheckerSupplier<T>	applyWithoutException()	Asserts that calling the get() method of the Supplier does not throw any exception.
static <T> CheckerSupplier<T>	check(Supplier<T> supplier)	Creates a new CheckerSupplier for the given Supplier instance with a default name.
static <T> CheckerSupplier<T>	check(Supplier<T> supplier, String name)	Creates a new CheckerSupplier for the given Supplier instance with a custom name.
CheckerSupplier<T>	producesExpected(T expected)	Asserts that the get() method of the Supplier produces the expected result.
CheckerSupplier<T>	producesNonNull()	Asserts that the get() method of the Supplier produces a non-null result.
protected CheckerSupplier<T>	self()	Returns this checker instance (for fluent API usage).

Methods inherited from class util.AbstractChecker

checkProperty, checkProperty, checkProperty, end, getMethod, getObject, getProperty, hasErrors, hasNotErrors, is, is, isEqual, isNonNull, isNot, isNot, isNull, notSaveErrors, saveErrors, show, showNotThrownException, showThrownException, stop

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CheckerSupplier

protected CheckerSupplier(Supplier<T> supplier,
 String name)

Constructs a new CheckerSupplier with the specified supplier and name.

Parameters:

supplier - the Supplier to be used by this checker

name - the name identifying this checker

Method Details

check

public static <T> CheckerSupplier<T> check(Supplier<T> supplier,
 String name)

Creates a new CheckerSupplier for the given Supplier instance with a custom name.

Type Parameters:

T - the type of results supplied by the Supplier

Parameters:

supplier - the Supplier instance to be checked

name - the name to identify this checker instance (useful for error messages)

Returns:

a new CheckerSupplier for the provided Supplier

check

public static <T> CheckerSupplier<T> check(Supplier<T> supplier)

Creates a new CheckerSupplier for the given Supplier instance with a default name.

Type Parameters:

T - the type of results supplied by the Supplier

Parameters:

supplier - the Supplier instance to be checked

Returns:

a new CheckerSupplier for the provided Supplier

self

protected CheckerSupplier<T> self()

Returns this checker instance (for fluent API usage).

Specified by:

self in class AbstractChecker<Supplier<T>,CheckerSupplier<T>>

Returns:

this CheckerSupplier instance

applyWithoutException

public CheckerSupplier<T> applyWithoutException()

Asserts that calling the get() method of the Supplier does not throw any exception.

Returns:

this CheckerSupplier instance for further validation

producesExpected

public CheckerSupplier<T> producesExpected(T expected)

Asserts that the get() method of the Supplier produces the expected result.

Parameters:

expected - the expected result to compare with the actual result of get()

Returns:

this CheckerSupplier instance for further validation

producesNonNull

public CheckerSupplier<T> producesNonNull()

Asserts that the get() method of the Supplier produces a non-null result.

Returns:

this CheckerSupplier instance for further validation