class TranslatableMarkupTest

class TranslatableMarkupTest extends UnitTestCase {
    
    /**
     * The error message of the last error in the error handler.
     *
     * @var string
     */
    protected $lastErrorMessage;
    
    /**
     * The error number of the last error in the error handler.
     *
     * @var int
     */
    protected $lastErrorNumber;
    
    /**
     * Custom error handler that saves the last error.
     *
     * We need this custom error handler because we cannot rely on the error to
     * exception conversion as __toString is never allowed to leak any kind of
     * exception.
     *
     * @param int $error_number
     *   The error number.
     * @param string $error_message
     *   The error message.
     */
    public function errorHandler($error_number, $error_message) {
        $this->lastErrorNumber = $error_number;
        $this->lastErrorMessage = $error_message;
    }
    
    /**
     * Tests that errors are correctly handled when a __toString() fails.
     *
     * @covers ::__toString
     */
    public function testToString() : void {
        $translation = $this->createMock(TranslationInterface::class);
        $string = 'May I have an exception?';
        $text = $this->getMockBuilder(TranslatableMarkup::class)
            ->setConstructorArgs([
            $string,
            [],
            [],
            $translation,
        ])
            ->onlyMethods([
            '_die',
        ])
            ->getMock();
        $text->expects($this->once())
            ->method('_die')
            ->willReturn('');
        $translation->method('translateString')
            ->with($text)
            ->willReturnCallback(function () {
            throw new \Exception('Yes you may.');
        });
        // We set a custom error handler because of https://github.com/sebastianbergmann/phpunit/issues/487
        set_error_handler([
            $this,
            'errorHandler',
        ]);
        // We want this to trigger an error.
        (string) $text;
        restore_error_handler();
        $this->assertEquals(E_USER_ERROR, $this->lastErrorNumber);
        $this->assertMatchesRegularExpression('/Exception thrown while calling __toString on a .*Mock_TranslatableMarkup_.* object in .*TranslatableMarkupTest.php on line [0-9]+: Yes you may./', $this->lastErrorMessage);
    }
    
    /**
     * @covers ::__construct
     */
    public function testIsStringAssertion() : void {
        $translation = $this->getStringTranslationStub();
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('$string ("foo") must be a string.');
        new TranslatableMarkup(new TranslatableMarkup('foo', [], [], $translation));
    }
    
    /**
     * @covers ::__construct
     */
    public function testIsStringAssertionWithFormattableMarkup() : void {
        $formattable_string = new FormattableMarkup('@bar', [
            '@bar' => 'foo',
        ]);
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('$string ("foo") must be a string.');
        new TranslatableMarkup($formattable_string);
    }

}