class JsonApiSpecTest

class JsonApiSpecTest extends UnitTestCase {
    
    /**
     * Ensures that member names are properly validated.
     *
     * @dataProvider providerTestIsValidMemberName
     * @covers ::isValidMemberName
     */
    public function testIsValidMemberName($member_name, $expected) : void {
        $this->assertSame($expected, JsonApiSpec::isValidMemberName($member_name));
    }
    
    /**
     * Data provider for testIsValidMemberName.
     */
    public static function providerTestIsValidMemberName() {
        // Copied from http://jsonapi.org/format/upcoming/#document-member-names.
        $data = [];
        $data['alphanumeric-lowercase'] = [
            '12kittens',
            TRUE,
        ];
        $data['alphanumeric-uppercase'] = [
            '12KITTENS',
            TRUE,
        ];
        $data['alphanumeric-mixed'] = [
            '12KiTtEnS',
            TRUE,
        ];
        $data['unicode-above-u+0080'] = [
            '12🐱🐱',
            TRUE,
        ];
        $data['hyphen-start'] = [
            '-kittens',
            FALSE,
        ];
        $data['hyphen-middle'] = [
            'kitt-ens',
            TRUE,
        ];
        $data['hyphen-end'] = [
            'kittens-',
            FALSE,
        ];
        $data['low-line-start'] = [
            '_kittens',
            FALSE,
        ];
        $data['low-line-middle'] = [
            'kitt_ens',
            TRUE,
        ];
        $data['low-line-end'] = [
            'kittens_',
            FALSE,
        ];
        $data['space-start'] = [
            ' kittens',
            FALSE,
        ];
        $data['space-middle'] = [
            'kitt ens',
            TRUE,
        ];
        $data['space-end'] = [
            'kittens ',
            FALSE,
        ];
        // Additional test cases.
        // @todo When D8 requires PHP >= 7, convert to \u{10FFFF}.
        $data['unicode-above-u+0080-highest-allowed'] = [
            "12􏿿",
            TRUE,
        ];
        $data['single-character'] = [
            'a',
            TRUE,
        ];
        $unsafe_chars = [
            '+',
            ',',
            '.',
            '[',
            ']',
            '!',
            '"',
            '#',
            '$',
            '%',
            '&',
            '\'',
            '(',
            ')',
            '*',
            '/',
            ':',
            ';',
            '<',
            '=',
            '>',
            '?',
            '@',
            '\\',
            '^',
            '`',
            '{',
            '|',
            '}',
            '~',
        ];
        foreach ($unsafe_chars as $unsafe_char) {
            $data['unsafe-' . $unsafe_char] = [
                'kitt' . $unsafe_char . 'ens',
                FALSE,
            ];
        }
        // The ASCII control characters are in the range 0x00 to 0x1F plus 0x7F.
        for ($ascii = 0; $ascii <= 0x1f; $ascii++) {
            $data['unsafe-ascii-control-' . $ascii] = [
                'kitt' . chr($ascii) . 'ens',
                FALSE,
            ];
        }
        $data['unsafe-ascii-control-' . 0x7f] = [
            'kitt' . chr(0x7f) . 'ens',
            FALSE,
        ];
        return $data;
    }
    
    /**
     * Provides test cases.
     *
     * @dataProvider providerTestIsValidCustomQueryParameter
     * @covers ::isValidCustomQueryParameter
     * @covers ::isValidMemberName
     */
    public function testIsValidCustomQueryParameter($custom_query_parameter, $expected) : void {
        $this->assertSame($expected, JsonApiSpec::isValidCustomQueryParameter($custom_query_parameter));
    }
    
    /**
     * Data provider for testIsValidCustomQueryParameter.
     */
    public static function providerTestIsValidCustomQueryParameter() {
        $data = static::providerTestIsValidMemberName();
        // All valid member names are also valid custom query parameters, except for
        // single-character ones.
        $data['single-character'][1] = FALSE;
        // Custom query parameter test cases.
        $data['custom-query-parameter-lowercase'] = [
            'foobar',
            FALSE,
        ];
        $data['custom-query-parameter-dash'] = [
            'foo-bar',
            TRUE,
        ];
        $data['custom-query-parameter-underscore'] = [
            'foo_bar',
            TRUE,
        ];
        $data['custom-query-parameter-camel-case'] = [
            'fooBar',
            TRUE,
        ];
        return $data;
    }

}