* add phpunit as a dev dependency

 * add some basic tests for UrlHelper::rewrite_relative()
 * fix UrlHelper::rewrite_relative() to work better on non-absolute
   relative URL paths

6 files changed, 661 insertions, 0 deletions

diff --git a/vendor/phpunit/php-code-coverage/src/Driver/Driver.php b/vendor/phpunit/php-code-coverage/src/Driver/Driver.php
new file mode 100644
index 000000000..dc2de68f4
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/Driver.php
@@ -0,0 +1,167 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use function sprintf;
+use SebastianBergmann\CodeCoverage\BranchAndPathCoverageNotSupportedException;
+use SebastianBergmann\CodeCoverage\DeadCodeDetectionNotSupportedException;
+use SebastianBergmann\CodeCoverage\Filter;
+use SebastianBergmann\CodeCoverage\NoCodeCoverageDriverAvailableException;
+use SebastianBergmann\CodeCoverage\NoCodeCoverageDriverWithPathCoverageSupportAvailableException;
+use SebastianBergmann\CodeCoverage\RawCodeCoverageData;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+abstract class Driver
+{
+    /**
+     * @var int
+     *
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    public const LINE_NOT_EXECUTABLE = -2;
+
+    /**
+     * @var int
+     *
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    public const LINE_NOT_EXECUTED = -1;
+
+    /**
+     * @var int
+     *
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    public const LINE_EXECUTED = 1;
+
+    /**
+     * @var int
+     *
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    public const BRANCH_NOT_HIT = 0;
+
+    /**
+     * @var int
+     *
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    public const BRANCH_HIT = 1;
+
+    /**
+     * @var bool
+     */
+    private $collectBranchAndPathCoverage = false;
+
+    /**
+     * @var bool
+     */
+    private $detectDeadCode = false;
+
+    /**
+     * @throws NoCodeCoverageDriverAvailableException
+     * @throws PcovNotAvailableException
+     * @throws PhpdbgNotAvailableException
+     * @throws Xdebug2NotEnabledException
+     * @throws Xdebug3NotEnabledException
+     * @throws XdebugNotAvailableException
+     *
+     * @deprecated Use DriverSelector::forLineCoverage() instead
+     */
+    public static function forLineCoverage(Filter $filter): self
+    {
+        return (new Selector)->forLineCoverage($filter);
+    }
+
+    /**
+     * @throws NoCodeCoverageDriverWithPathCoverageSupportAvailableException
+     * @throws Xdebug2NotEnabledException
+     * @throws Xdebug3NotEnabledException
+     * @throws XdebugNotAvailableException
+     *
+     * @deprecated Use DriverSelector::forLineAndPathCoverage() instead
+     */
+    public static function forLineAndPathCoverage(Filter $filter): self
+    {
+        return (new Selector)->forLineAndPathCoverage($filter);
+    }
+
+    public function canCollectBranchAndPathCoverage(): bool
+    {
+        return false;
+    }
+
+    public function collectsBranchAndPathCoverage(): bool
+    {
+        return $this->collectBranchAndPathCoverage;
+    }
+
+    /**
+     * @throws BranchAndPathCoverageNotSupportedException
+     */
+    public function enableBranchAndPathCoverage(): void
+    {
+        if (!$this->canCollectBranchAndPathCoverage()) {
+            throw new BranchAndPathCoverageNotSupportedException(
+                sprintf(
+                    '%s does not support branch and path coverage',
+                    $this->nameAndVersion()
+                )
+            );
+        }
+
+        $this->collectBranchAndPathCoverage = true;
+    }
+
+    public function disableBranchAndPathCoverage(): void
+    {
+        $this->collectBranchAndPathCoverage = false;
+    }
+
+    public function canDetectDeadCode(): bool
+    {
+        return false;
+    }
+
+    public function detectsDeadCode(): bool
+    {
+        return $this->detectDeadCode;
+    }
+
+    /**
+     * @throws DeadCodeDetectionNotSupportedException
+     */
+    public function enableDeadCodeDetection(): void
+    {
+        if (!$this->canDetectDeadCode()) {
+            throw new DeadCodeDetectionNotSupportedException(
+                sprintf(
+                    '%s does not support dead code detection',
+                    $this->nameAndVersion()
+                )
+            );
+        }
+
+        $this->detectDeadCode = true;
+    }
+
+    public function disableDeadCodeDetection(): void
+    {
+        $this->detectDeadCode = false;
+    }
+
+    abstract public function nameAndVersion(): string;
+
+    abstract public function start(): void;
+
+    abstract public function stop(): RawCodeCoverageData;
+}
diff --git a/vendor/phpunit/php-code-coverage/src/Driver/PcovDriver.php b/vendor/phpunit/php-code-coverage/src/Driver/PcovDriver.php
new file mode 100644
index 000000000..c30b30c44
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/PcovDriver.php
@@ -0,0 +1,75 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use const pcov\inclusive;
+use function array_intersect;
+use function extension_loaded;
+use function pcov\clear;
+use function pcov\collect;
+use function pcov\start;
+use function pcov\stop;
+use function pcov\waiting;
+use function phpversion;
+use SebastianBergmann\CodeCoverage\Filter;
+use SebastianBergmann\CodeCoverage\RawCodeCoverageData;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+final class PcovDriver extends Driver
+{
+    /**
+     * @var Filter
+     */
+    private $filter;
+
+    /**
+     * @throws PcovNotAvailableException
+     */
+    public function __construct(Filter $filter)
+    {
+        if (!extension_loaded('pcov')) {
+            throw new PcovNotAvailableException;
+        }
+
+        $this->filter = $filter;
+    }
+
+    public function start(): void
+    {
+        start();
+    }
+
+    public function stop(): RawCodeCoverageData
+    {
+        stop();
+
+        $filesToCollectCoverageFor = waiting();
+        $collected                 = [];
+
+        if ($filesToCollectCoverageFor) {
+            if (!$this->filter->isEmpty()) {
+                $filesToCollectCoverageFor = array_intersect($filesToCollectCoverageFor, $this->filter->files());
+            }
+
+            $collected = collect(inclusive, $filesToCollectCoverageFor);
+
+            clear();
+        }
+
+        return RawCodeCoverageData::fromXdebugWithoutPathCoverage($collected);
+    }
+
+    public function nameAndVersion(): string
+    {
+        return 'PCOV ' . phpversion('pcov');
+    }
+}
diff --git a/vendor/phpunit/php-code-coverage/src/Driver/PhpdbgDriver.php b/vendor/phpunit/php-code-coverage/src/Driver/PhpdbgDriver.php
new file mode 100644
index 000000000..7ee13b00f
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/PhpdbgDriver.php
@@ -0,0 +1,93 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use const PHP_SAPI;
+use const PHP_VERSION;
+use function array_diff;
+use function array_keys;
+use function array_merge;
+use function get_included_files;
+use function phpdbg_end_oplog;
+use function phpdbg_get_executable;
+use function phpdbg_start_oplog;
+use SebastianBergmann\CodeCoverage\RawCodeCoverageData;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+final class PhpdbgDriver extends Driver
+{
+    /**
+     * @throws PhpdbgNotAvailableException
+     */
+    public function __construct()
+    {
+        if (PHP_SAPI !== 'phpdbg') {
+            throw new PhpdbgNotAvailableException;
+        }
+    }
+
+    public function start(): void
+    {
+        phpdbg_start_oplog();
+    }
+
+    public function stop(): RawCodeCoverageData
+    {
+        static $fetchedLines = [];
+
+        $dbgData = phpdbg_end_oplog();
+
+        if ($fetchedLines === []) {
+            $sourceLines = phpdbg_get_executable();
+        } else {
+            $newFiles = array_diff(get_included_files(), array_keys($fetchedLines));
+
+            $sourceLines = [];
+
+            if ($newFiles) {
+                $sourceLines = phpdbg_get_executable(['files' => $newFiles]);
+            }
+        }
+
+        foreach ($sourceLines as $file => $lines) {
+            foreach ($lines as $lineNo => $numExecuted) {
+                $sourceLines[$file][$lineNo] = self::LINE_NOT_EXECUTED;
+            }
+        }
+
+        $fetchedLines = array_merge($fetchedLines, $sourceLines);
+
+        return RawCodeCoverageData::fromXdebugWithoutPathCoverage(
+            $this->detectExecutedLines($fetchedLines, $dbgData)
+        );
+    }
+
+    public function nameAndVersion(): string
+    {
+        return 'PHPDBG ' . PHP_VERSION;
+    }
+
+    private function detectExecutedLines(array $sourceLines, array $dbgData): array
+    {
+        foreach ($dbgData as $file => $coveredLines) {
+            foreach ($coveredLines as $lineNo => $numExecuted) {
+                // phpdbg also reports $lineNo=0 when e.g. exceptions get thrown.
+                // make sure we only mark lines executed which are actually executable.
+                if (isset($sourceLines[$file][$lineNo])) {
+                    $sourceLines[$file][$lineNo] = self::LINE_EXECUTED;
+                }
+            }
+        }
+
+        return $sourceLines;
+    }
+}
diff --git a/vendor/phpunit/php-code-coverage/src/Driver/Selector.php b/vendor/phpunit/php-code-coverage/src/Driver/Selector.php
new file mode 100644
index 000000000..936ee8981
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/Selector.php
@@ -0,0 +1,79 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use function phpversion;
+use function version_compare;
+use SebastianBergmann\CodeCoverage\Filter;
+use SebastianBergmann\CodeCoverage\NoCodeCoverageDriverAvailableException;
+use SebastianBergmann\CodeCoverage\NoCodeCoverageDriverWithPathCoverageSupportAvailableException;
+use SebastianBergmann\Environment\Runtime;
+
+final class Selector
+{
+    /**
+     * @throws NoCodeCoverageDriverAvailableException
+     * @throws PcovNotAvailableException
+     * @throws PhpdbgNotAvailableException
+     * @throws Xdebug2NotEnabledException
+     * @throws Xdebug3NotEnabledException
+     * @throws XdebugNotAvailableException
+     */
+    public function forLineCoverage(Filter $filter): Driver
+    {
+        $runtime = new Runtime;
+
+        if ($runtime->hasPHPDBGCodeCoverage()) {
+            return new PhpdbgDriver;
+        }
+
+        if ($runtime->hasPCOV()) {
+            return new PcovDriver($filter);
+        }
+
+        if ($runtime->hasXdebug()) {
+            if (version_compare(phpversion('xdebug'), '3', '>=')) {
+                $driver = new Xdebug3Driver($filter);
+            } else {
+                $driver = new Xdebug2Driver($filter);
+            }
+
+            $driver->enableDeadCodeDetection();
+
+            return $driver;
+        }
+
+        throw new NoCodeCoverageDriverAvailableException;
+    }
+
+    /**
+     * @throws NoCodeCoverageDriverWithPathCoverageSupportAvailableException
+     * @throws Xdebug2NotEnabledException
+     * @throws Xdebug3NotEnabledException
+     * @throws XdebugNotAvailableException
+     */
+    public function forLineAndPathCoverage(Filter $filter): Driver
+    {
+        if ((new Runtime)->hasXdebug()) {
+            if (version_compare(phpversion('xdebug'), '3', '>=')) {
+                $driver = new Xdebug3Driver($filter);
+            } else {
+                $driver = new Xdebug2Driver($filter);
+            }
+
+            $driver->enableDeadCodeDetection();
+            $driver->enableBranchAndPathCoverage();
+
+            return $driver;
+        }
+
+        throw new NoCodeCoverageDriverWithPathCoverageSupportAvailableException;
+    }
+}
diff --git a/vendor/phpunit/php-code-coverage/src/Driver/Xdebug2Driver.php b/vendor/phpunit/php-code-coverage/src/Driver/Xdebug2Driver.php
new file mode 100644
index 000000000..74cbbfbcd
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/Xdebug2Driver.php
@@ -0,0 +1,128 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use const XDEBUG_CC_BRANCH_CHECK;
+use const XDEBUG_CC_DEAD_CODE;
+use const XDEBUG_CC_UNUSED;
+use const XDEBUG_FILTER_CODE_COVERAGE;
+use const XDEBUG_PATH_INCLUDE;
+use const XDEBUG_PATH_WHITELIST;
+use function defined;
+use function extension_loaded;
+use function ini_get;
+use function phpversion;
+use function sprintf;
+use function version_compare;
+use function xdebug_get_code_coverage;
+use function xdebug_set_filter;
+use function xdebug_start_code_coverage;
+use function xdebug_stop_code_coverage;
+use SebastianBergmann\CodeCoverage\Filter;
+use SebastianBergmann\CodeCoverage\RawCodeCoverageData;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+final class Xdebug2Driver extends Driver
+{
+    /**
+     * @var bool
+     */
+    private $pathCoverageIsMixedCoverage;
+
+    /**
+     * @throws WrongXdebugVersionException
+     * @throws Xdebug2NotEnabledException
+     * @throws XdebugNotAvailableException
+     */
+    public function __construct(Filter $filter)
+    {
+        if (!extension_loaded('xdebug')) {
+            throw new XdebugNotAvailableException;
+        }
+
+        if (version_compare(phpversion('xdebug'), '3', '>=')) {
+            throw new WrongXdebugVersionException(
+                sprintf(
+                    'This driver requires Xdebug 2 but version %s is loaded',
+                    phpversion('xdebug')
+                )
+            );
+        }
+
+        if (!ini_get('xdebug.coverage_enable')) {
+            throw new Xdebug2NotEnabledException;
+        }
+
+        if (!$filter->isEmpty()) {
+            if (defined('XDEBUG_PATH_WHITELIST')) {
+                $listType = XDEBUG_PATH_WHITELIST;
+            } else {
+                $listType = XDEBUG_PATH_INCLUDE;
+            }
+
+            xdebug_set_filter(
+                XDEBUG_FILTER_CODE_COVERAGE,
+                $listType,
+                $filter->files()
+            );
+        }
+
+        $this->pathCoverageIsMixedCoverage = version_compare(phpversion('xdebug'), '2.9.6', '<');
+    }
+
+    public function canCollectBranchAndPathCoverage(): bool
+    {
+        return true;
+    }
+
+    public function canDetectDeadCode(): bool
+    {
+        return true;
+    }
+
+    public function start(): void
+    {
+        $flags = XDEBUG_CC_UNUSED;
+
+        if ($this->detectsDeadCode() || $this->collectsBranchAndPathCoverage()) {
+            $flags |= XDEBUG_CC_DEAD_CODE;
+        }
+
+        if ($this->collectsBranchAndPathCoverage()) {
+            $flags |= XDEBUG_CC_BRANCH_CHECK;
+        }
+
+        xdebug_start_code_coverage($flags);
+    }
+
+    public function stop(): RawCodeCoverageData
+    {
+        $data = xdebug_get_code_coverage();
+
+        xdebug_stop_code_coverage();
+
+        if ($this->collectsBranchAndPathCoverage()) {
+            if ($this->pathCoverageIsMixedCoverage) {
+                return RawCodeCoverageData::fromXdebugWithMixedCoverage($data);
+            }
+
+            return RawCodeCoverageData::fromXdebugWithPathCoverage($data);
+        }
+
+        return RawCodeCoverageData::fromXdebugWithoutPathCoverage($data);
+    }
+
+    public function nameAndVersion(): string
+    {
+        return 'Xdebug ' . phpversion('xdebug');
+    }
+}
diff --git a/vendor/phpunit/php-code-coverage/src/Driver/Xdebug3Driver.php b/vendor/phpunit/php-code-coverage/src/Driver/Xdebug3Driver.php
new file mode 100644
index 000000000..b85db4034
--- /dev/null
+++ b/vendor/phpunit/php-code-coverage/src/Driver/Xdebug3Driver.php
@@ -0,0 +1,119 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeCoverage\Driver;
+
+use const XDEBUG_CC_BRANCH_CHECK;
+use const XDEBUG_CC_DEAD_CODE;
+use const XDEBUG_CC_UNUSED;
+use const XDEBUG_FILTER_CODE_COVERAGE;
+use const XDEBUG_PATH_INCLUDE;
+use function explode;
+use function extension_loaded;
+use function getenv;
+use function in_array;
+use function ini_get;
+use function phpversion;
+use function sprintf;
+use function version_compare;
+use function xdebug_get_code_coverage;
+use function xdebug_set_filter;
+use function xdebug_start_code_coverage;
+use function xdebug_stop_code_coverage;
+use SebastianBergmann\CodeCoverage\Filter;
+use SebastianBergmann\CodeCoverage\RawCodeCoverageData;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
+ */
+final class Xdebug3Driver extends Driver
+{
+    /**
+     * @throws WrongXdebugVersionException
+     * @throws Xdebug3NotEnabledException
+     * @throws XdebugNotAvailableException
+     */
+    public function __construct(Filter $filter)
+    {
+        if (!extension_loaded('xdebug')) {
+            throw new XdebugNotAvailableException;
+        }
+
+        if (version_compare(phpversion('xdebug'), '3', '<')) {
+            throw new WrongXdebugVersionException(
+                sprintf(
+                    'This driver requires Xdebug 3 but version %s is loaded',
+                    phpversion('xdebug')
+                )
+            );
+        }
+
+        $mode = getenv('XDEBUG_MODE');
+
+        if ($mode === false || $mode === '') {
+            $mode = ini_get('xdebug.mode');
+        }
+
+        if ($mode === false ||
+            !in_array('coverage', explode(',', $mode), true)) {
+            throw new Xdebug3NotEnabledException;
+        }
+
+        if (!$filter->isEmpty()) {
+            xdebug_set_filter(
+                XDEBUG_FILTER_CODE_COVERAGE,
+                XDEBUG_PATH_INCLUDE,
+                $filter->files()
+            );
+        }
+    }
+
+    public function canCollectBranchAndPathCoverage(): bool
+    {
+        return true;
+    }
+
+    public function canDetectDeadCode(): bool
+    {
+        return true;
+    }
+
+    public function start(): void
+    {
+        $flags = XDEBUG_CC_UNUSED;
+
+        if ($this->detectsDeadCode() || $this->collectsBranchAndPathCoverage()) {
+            $flags |= XDEBUG_CC_DEAD_CODE;
+        }
+
+        if ($this->collectsBranchAndPathCoverage()) {
+            $flags |= XDEBUG_CC_BRANCH_CHECK;
+        }
+
+        xdebug_start_code_coverage($flags);
+    }
+
+    public function stop(): RawCodeCoverageData
+    {
+        $data = xdebug_get_code_coverage();
+
+        xdebug_stop_code_coverage();
+
+        if ($this->collectsBranchAndPathCoverage()) {
+            return RawCodeCoverageData::fromXdebugWithPathCoverage($data);
+        }
+
+        return RawCodeCoverageData::fromXdebugWithoutPathCoverage($data);
+    }
+
+    public function nameAndVersion(): string
+    {
+        return 'Xdebug ' . phpversion('xdebug');
+    }
+}