PHP code example of phrozenbyte / phpunit-throwable-asserts

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

phrozenbyte / phpunit-throwable-asserts example snippets

// using `PhrozenByte\PHPUnitThrowableAsserts\ThrowableAssertsTrait` trait
ThrowableAssertsTrait::assertCallableThrows(
    callable $callable,                                // the Callable to call
    string $throwableClassName = Throwable::class,     // assert that a Throwable of the given class is thrown
    Constraint|string $throwableMessage = null,        // assert that its message matches the given constraint
    int|string $throwableCode = null,                  // assert that its code matches the given one
    bool $throwableExactMatch = false,                 // whether an exact match of the class name is 

$controller = new BookController();
$bookName = "The Hitchhiker's Guide to the Galaxy";
$bookReleaseDate = '1979-10-12';

$this->assertCallableThrows(
    $this->callableProxy([ $controller, 'create' ], $bookName, $bookReleaseDate),
    BookAlreadyExistsException::class,
    'Unable to create book: Book already exists'
);

$service = new HitchhikersGuideService();
$towel = false;
$answer = 42;

$this->assertCallableThrows(
    static function () use ($service, $towel, $answer) {
        $service->checkAnswer($answer); // throws a OpaqueAnswerException
        $service->checkTowel($towel);   // throws a PanicException (unreachable code)
    },
    PanicException::class,
    'I forgot my towel'
);

// Will fail with the following message:
//
//     Failed asserting that {closure}() throws a PanicException whose message is 'Time to panic'.
//     Encountered invalid OpaqueAnswerException: I do not understand.
//     --- Expected
//     +++ Actual
//     @@ @@
//     -'Time to panic'
//     +'I do not understand'

// using `PhrozenByte\PHPUnitThrowableAsserts\ThrowableAssertsTrait` trait
ThrowableAssertsTrait::assertCallableThrowsNot(
    callable $callable,                            // the Callable to call
    string $throwableClassName = Throwable::class, // assert that no Throwable of the given class is thrown
    Constraint|string $throwableMessage = null,    // catch Throwables matching the given message constraint only
    int|string $throwableCode = null,              // catch Throwables matching the given code only
    bool $throwableExactMatch = false,             // whether only Throwables of the given class are caught
    string $message = ''                           // additional information about the test
);

// using new instance of `PhrozenByte\PHPUnitThrowableAsserts\Constraint\CallableThrowsNot`
new CallableThrowsNot(
    string $className = Throwable::class,
    Constraint|string $message = null,
    int|string $code = null,
    bool $exactMatch = false
);

$controller = CharacterController();
$character = 'Prostetnik Vogon Jeltz';

$this->assertCallableThrowsNot(
    $this->callableProxy([ $controller, 'meet' ], $character),
    VogonWantsToReadPoetException::class
);

$controller = new BookController();
$bookName = "The Hitchhiker's Guide to the Galaxy";
$bookReleaseDate = '1979-10-12';

$this->assertCallableThrowsNot(
    $this->callableProxy([ $controller, 'create' ], $bookName, $bookReleaseDate),
    BookAlreadyExistsException::class
);

// Will fail with the following message:
//
//     Failed asserting that BookController::create() does not throw a BookAlreadyExistsException
//     Encountered invalid BookAlreadyExistsException: Unable to create book: Book already exists

// create new instance of `PhrozenByte\PHPUnitThrowableAsserts\CallableProxy`
// using the `PhrozenByte\PHPUnitThrowableAsserts\ThrowableAssertsTrait` trait
ThrowableAssertsTrait::callableProxy(
     callable $callable,    // the Callable to invoke
     mixed    ...$arguments // the arguments to pass to the Callable
);

// create new instance of `PhrozenByte\PHPUnitThrowableAsserts\CachedCallableProxy`
// using the `PhrozenByte\PHPUnitThrowableAsserts\ThrowableAssertsTrait` trait
$proxy = ThrowableAssertsTrait::cachedCallableProxy(
     callable $callable,    // the Callable to invoke
     mixed    ...$arguments // the arguments to pass to the Callable
);

// get return value of the Callable (`CachedCallableProxy` only)
$proxy->getReturnValue();

// get a possibly thrown Throwable (`CachedCallableProxy` only)
$proxy->getThrowable();

$computer = new DeepThought();
$question = 'What is the Answer to the Ultimate Question of Life, the Universe, and Everything?';

// using `PhrozenByte\PHPUnitThrowableAsserts\CallableProxy`
// if the assertion fails, `ExpectationFailedException`'s message will point to DeepThought::ask() as source
$askQuestion = $this->cachedCallableProxy([ $computer, 'ask' ], $question);
$this->assertCallableThrowsNot($askQuestion);
$answer = $askQuestion->getReturnValue();

// using anonymous function
// if the assertion fails, `ExpectationFailedException` will just name {closure} as source
$answer = null;
$this->assertCallableThrowsNot(static function () use ($computer, $question, &$answer) {
    // use variable reference to pass the return value
    $answer = $computer->ask($question);
});

$this->assertCallableThrows(
    static function () {
        // triggers a E_NOTICE PHP error
        echo $undefinedVariable;
    },
    \PHPUnit\Framework\Error\Notice::class,
    'Undefined variable: undefinedVariable'
);