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TestFileEditor.php
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TestFileEditor.php
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<?php
class TestFileEditor {
/** @var string[] */
private $lines;
/** @var int */
private $numLines;
/** @var array<string,true> */
private $deletions;
/** @var array<string,array<string,array>> */
private $changes;
/** @var int */
private $pos = 0;
/** @var callable|null */
private $warningCallback;
/** @var string */
private $result = '';
public static function edit(
string $text, array $deletions, array $changes, ?callable $warningCallback = null
): string {
$editor = new self( $text, $deletions, $changes, $warningCallback );
$editor->execute();
return $editor->result;
}
private function __construct( string $text, array $deletions, array $changes, ?callable $warningCallback ) {
$this->lines = explode( "\n", $text );
$this->numLines = count( $this->lines );
$this->deletions = array_fill_keys( $deletions, true );
$this->changes = $changes;
$this->warningCallback = $warningCallback;
}
private function execute() {
while ( $this->pos < $this->numLines ) {
$line = $this->lines[$this->pos];
switch ( $this->getHeading( $line ) ) {
case 'test':
$this->parseTest();
break;
case 'hooks':
case 'functionhooks':
$this->parseHooks();
break;
default:
if ( $this->pos < $this->numLines - 1 ) {
$line .= "\n";
}
$this->emitComment( $line );
$this->pos++;
}
}
foreach ( $this->deletions as $deletion => $unused ) {
$this->warning( "Could not find test \"$deletion\" to delete it" );
}
foreach ( $this->changes as $test => $sectionChanges ) {
foreach ( $sectionChanges as $section => $change ) {
$this->warning( "Could not find section \"$section\" in test \"$test\" " .
"to {$change['op']} it" );
}
}
}
private function warning( string $text ) {
$cb = $this->warningCallback;
if ( $cb ) {
$cb( $text );
}
}
/** @return string|false */
private function getHeading( string $line ) {
if ( preg_match( '/^!!\s*(\S+)/', $line, $m ) ) {
return $m[1];
} else {
return false;
}
}
private function parseTest() {
$test = [];
$line = $this->lines[$this->pos++];
$heading = $this->getHeading( $line );
$section = [
'name' => $heading,
'headingLine' => $line,
'contents' => ''
];
while ( $this->pos < $this->numLines ) {
$line = $this->lines[$this->pos++];
$nextHeading = $this->getHeading( $line );
if ( $nextHeading === 'end' ) {
$test[] = $section;
// Add trailing line breaks to the "end" section, to allow for neat deletions
$trail = '';
while ( $this->lines[$this->pos] === '' && $this->pos < $this->numLines - 1 ) {
$trail .= "\n";
$this->pos++;
}
$test[] = [
'name' => 'end',
'headingLine' => $line,
'contents' => $trail
];
$this->emitTest( $test );
return;
} elseif ( $nextHeading !== false ) {
$test[] = $section;
$heading = $nextHeading;
$section = [
'name' => $heading,
'headingLine' => $line,
'contents' => ''
];
} else {
$section['contents'] .= "$line\n";
}
}
throw new OutOfBoundsException( 'Unexpected end of file' );
}
private function parseHooks() {
$line = $this->lines[$this->pos++];
$heading = $this->getHeading( $line );
$expectedEnd = 'end' . $heading;
$contents = "$line\n";
do {
$line = $this->lines[$this->pos++];
$nextHeading = $this->getHeading( $line );
$contents .= "$line\n";
} while ( $this->pos < $this->numLines && $nextHeading !== $expectedEnd );
if ( $nextHeading !== $expectedEnd ) {
throw new UnexpectedValueException( 'Unexpected end of file' );
}
$this->emitHooks( $heading, $contents );
}
protected function emitComment( string $contents ) {
$this->result .= $contents;
}
protected function emitTest( array $test ) {
$testName = false;
foreach ( $test as $section ) {
if ( $section['name'] === 'test' ) {
$testName = rtrim( $section['contents'], "\n" );
}
}
if ( isset( $this->deletions[$testName] ) ) {
// Acknowledge deletion
unset( $this->deletions[$testName] );
return;
}
if ( isset( $this->changes[$testName] ) ) {
$changes =& $this->changes[$testName];
foreach ( $test as $i => $section ) {
$sectionName = $section['name'];
if ( isset( $changes[$sectionName] ) ) {
$change = $changes[$sectionName];
switch ( $change['op'] ) {
case 'rename':
$test[$i]['name'] = $change['value'];
$test[$i]['headingLine'] = "!! {$change['value']}";
break;
case 'update':
$test[$i]['contents'] = $change['value'];
break;
case 'delete':
$test[$i]['deleted'] = true;
break;
default:
throw new UnexpectedValueException( "Unknown op: {$change['op']}" );
}
// Acknowledge
// Note that we use the old section name for the rename op
unset( $changes[$sectionName] );
}
}
}
foreach ( $test as $section ) {
if ( isset( $section['deleted'] ) ) {
continue;
}
$this->result .= $section['headingLine'] . "\n";
$this->result .= $section['contents'];
}
}
protected function emitHooks( string $heading, string $contents ) {
$this->result .= $contents;
}
}

File Metadata

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text/x-php
Expires
Aug 18 2026, 11:19 (5 w, 3 d ago)
Storage Engine
local-disk
Storage Format
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Storage Handle
44/b8/f7860bd4f309404aad4a33bfe695
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TestFileEditor.php (5 KB)

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