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SpecificAssertionsSniff.php
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SpecificAssertionsSniff.php
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<?php
namespace MediaWiki\Sniffs\PHPUnit;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
/**
* Replace generic assertions about specific conditions
* - assertArrayHasKey (and assertArrayNotHasKey)
* - assertContains (and assertNotContains)
* - assertStringContainsString (and assertStringNotContainsString)
* - assertIsArray (and assertIsNotArray)
* - assertEmpty (and assertNotEmpty)
*
* @author DannyS712
* @license GPL-2.0-or-later
*/
class SpecificAssertionsSniff implements Sniff {
use PHPUnitTestTrait;
private const ASSERTIONS = [
'assertTrue' => [
'array_key_exists' => 'assertArrayHasKey',
'empty' => 'assertEmpty',
'in_array' => 'assertContains',
'is_array' => 'assertIsArray',
],
'assertFalse' => [
'array_key_exists' => 'assertArrayNotHasKey',
'empty' => 'assertNotEmpty',
'in_array' => 'assertNotContains',
'is_array' => 'assertIsNotArray',
'strpos' => 'assertStringNotContainsString',
],
'assertNotFalse' => [
'strpos' => 'assertStringContainsString',
],
'assertIsInt' => [
'strpos' => 'assertStringContainsString',
],
];
/**
* @inheritDoc
*/
public function register(): array {
return [ T_STRING ];
}
/**
* @param File $phpcsFile
* @param int $stackPtr
*
* @return void|int
*/
public function process( File $phpcsFile, $stackPtr ) {
if ( !$this->isTestFile( $phpcsFile, $stackPtr ) ) {
return $phpcsFile->numTokens;
}
$tokens = $phpcsFile->getTokens();
$assertion = $tokens[$stackPtr]['content'];
// We don't care about stuff that's not in a method in a class
if ( $tokens[$stackPtr]['level'] < 2 || !isset( self::ASSERTIONS[$assertion] ) ) {
return;
}
// now a map of the method name that is within the assertion to the new assertion name
$relevantReplacements = self::ASSERTIONS[$assertion];
$opener = $phpcsFile->findNext( T_WHITESPACE, $stackPtr + 1, null, true );
if ( !isset( $tokens[$opener]['parenthesis_closer'] ) ) {
// Looks like this string is not a method call
return $opener;
}
$method = $phpcsFile->findNext( T_WHITESPACE, $opener + 1, null, true );
$functionCalled = $tokens[$method]['content'];
// assertEmpty/assertNotEmpty look for empty() which is T_EMPTY
if (
(
$tokens[$method]['code'] !== T_STRING
&& $tokens[$method]['code'] !== T_EMPTY
)
|| !isset( $relevantReplacements[ $functionCalled ] )
) {
return $method;
}
$replacementMethod = $relevantReplacements[ $functionCalled ];
$methodOpener = $phpcsFile->findNext( T_WHITESPACE, $method + 1, null, true );
if ( !isset( $tokens[$methodOpener]['parenthesis_closer'] ) ) {
// Looks like this string is not a method call
return $methodOpener;
}
$methodCloser = $tokens[$methodOpener]['parenthesis_closer'];
$afterMethod = $phpcsFile->findNext( T_WHITESPACE, $methodCloser + 1, null, true );
if ( !in_array( $tokens[$afterMethod]['code'], [ T_COMMA, T_CLOSE_PARENTHESIS ] ) ) {
// Not followed by a comma and a second parameter, or a closing parenthesis
// something more complex is going on
return;
}
$methodContentStart = $phpcsFile->findNext( T_WHITESPACE, $methodOpener + 1, null, true );
$methodContentEnd = $phpcsFile->findPrevious( T_WHITESPACE, $methodCloser - 1, null, true );
// Depending on the function, if there is a third parameter we might not be able
// to fix it. We need $firstComma later, so declare it outside of the if statement,
// and declare $secondComma here too so that they stay together
$firstComma = false;
$secondComma = false;
if ( $functionCalled === 'in_array' || $functionCalled === 'strpos' ) {
// Jump over the first two parameters, whatever they may be
$searchTokens = [
T_OPEN_CURLY_BRACKET,
T_OPEN_SQUARE_BRACKET,
T_OPEN_PARENTHESIS,
T_OPEN_SHORT_ARRAY,
T_COMMA
];
$next = $phpcsFile->findNext( $searchTokens, $methodOpener + 1, $methodCloser );
while ( $secondComma === false ) {
if ( $next === false ) {
// No token
break;
}
switch ( $tokens[$next]['code'] ) {
case T_OPEN_CURLY_BRACKET:
case T_OPEN_SQUARE_BRACKET:
case T_OPEN_PARENTHESIS:
case T_OPEN_SHORT_ARRAY:
if ( isset( $tokens[$next]['parenthesis_closer'] ) ) {
// jump to closing parenthesis to ignore commas between opener and closer
$next = $tokens[$next]['parenthesis_closer'];
} elseif ( isset( $tokens[$next]['bracket_closer'] ) ) {
// jump to closing bracket
$next = $tokens[$next]['bracket_closer'];
}
break;
case T_COMMA:
if ( $firstComma === false ) {
$firstComma = $next;
} else {
$secondComma = $next;
}
}
$next = $phpcsFile->findNext( $searchTokens, $next + 1, $methodCloser );
}
if ( $firstComma === false ) {
// Huh? Bad function call
return;
}
if ( $secondComma !== false && $functionCalled === 'strpos' ) {
// We can't do the replacement if there is a third parameter
return;
}
if ( $secondComma !== false && $functionCalled === 'in_array' ) {
// If we wanted to be exact, we would replace in_array with
// assertContainsEqual, but since that is less specific than
// assertContains, we always use assertContains, even if the in_array
// call didn't have a third parameter (true) passed. This *may* result
// in the autofix causing tests to fail - if the decision to use in_array
// without a third parameter true was intentional, replace the assertContains
// with assertContainsEqual manually
$next = $phpcsFile->findNext( T_WHITESPACE, $secondComma + 1, $methodCloser, true );
if ( $tokens[$next]['code'] === T_FALSE ) {
// false is the default, no need for anything with the assertion
// just need to delete the parameter
$methodContentEnd = $phpcsFile->findPrevious( T_WHITESPACE, $secondComma - 1, null, true );
} elseif ( $tokens[$next]['code'] === T_TRUE ) {
// here we would switch from assertContainsEqual to assertContains
// but as noted above we're always using assertContains
$methodContentEnd = $phpcsFile->findPrevious( T_WHITESPACE, $secondComma - 1, null, true );
} else {
// third parameter is something else, can't handle
return;
}
// make sure there is nothing else making things weird
$next = $phpcsFile->findNext( T_WHITESPACE, $next + 1, $methodCloser, true );
if ( $next ) {
// something like `true || $var` just to mess with us...
return;
}
}
}
$fix = $phpcsFile->addFixableWarning(
'%s should be used instead of manually using %s with the result of %s',
$stackPtr,
$replacementMethod,
[ $replacementMethod, $assertion, $functionCalled ]
);
if ( !$fix ) {
return;
}
$phpcsFile->fixer->beginChangeset();
// Need to switch the order of parameters from strpos to assertStringContainsString
if ( $functionCalled === 'strpos' ) {
// strpos( $param1, $param2 )
$nonSpaceAfterFirstComma = $phpcsFile->findNext( T_WHITESPACE, $firstComma + 1, null, true );
$param1 = $phpcsFile->getTokensAsString(
$methodContentStart,
$firstComma - $methodContentStart,
// keep tabs on multiline statements
true
);
$param2 = $phpcsFile->getTokensAsString(
$nonSpaceAfterFirstComma,
$methodContentEnd - $nonSpaceAfterFirstComma + 1,
// keep tabs on multiline statements
true
);
// Remove the params
for ( $i = $methodContentStart; $i <= $methodContentEnd; $i++ ) {
if ( $i < $firstComma || $i >= $nonSpaceAfterFirstComma ) {
$phpcsFile->fixer->replaceToken( $i, '' );
}
}
// We got ride of the content before the comma and the content after,
// now add the switched content around the comma
$phpcsFile->fixer->addContent( $nonSpaceAfterFirstComma, $param1 );
$phpcsFile->fixer->addContentBefore( $firstComma, $param2 );
}
$phpcsFile->fixer->replaceToken( $stackPtr, $replacementMethod );
$phpcsFile->fixer->replaceToken( $method, '' );
$phpcsFile->fixer->replaceToken( $methodOpener, '' );
for ( $i = $methodOpener + 1; $i < $methodContentStart; $i++ ) {
// Whitespace between function ( and the content
$phpcsFile->fixer->replaceToken( $i, '' );
}
for ( $i = $methodContentEnd + 1; $i < $methodCloser; $i++ ) {
// Whitespace between content and ) (could also include the optional third
// parameter for in_array)
$phpcsFile->fixer->replaceToken( $i, '' );
}
$phpcsFile->fixer->replaceToken( $methodCloser, '' );
$phpcsFile->fixer->endChangeset();
// There is no way the next assertion can be closer than this
return $tokens[$opener]['parenthesis_closer'] + 4;
}
}

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