PHPUnitExpectsSniff.php

<?php
class Behance_Sniffs_Gotchas_PHPUnitExpectsSniff implements PHP_CodeSniffer_Sniff {

  public function register() {
    return [ T_STRING ];
  } // register

  /**
   * Processes this test, when one of its tokens is encountered.
   *
   * @param PHP_CodeSniffer_File $phpcsFile All the tokens found in the document.
   * @param int                  $stackPtr  The position of the current token in the
   *                                        stack passed in $tokens.
   */
  public function process( PHP_CodeSniffer_File $phpcsFile, $stackPtr ) {

    $tokens            = $phpcsFile->getTokens();
    $string_found      = $tokens[ $stackPtr ];
    $previous_variable = $tokens[ $stackPtr - 2 ];

    if ( $string_found['content'] !== "expects") {
      return;
    }

    if ( $tokens[ $stackPtr - 1 ]['code'] !== T_OBJECT_OPERATOR ) {
      return;
    }

    if ( $previous_variable['code'] !== T_VARIABLE ) {
      $error = 'Using expects method must be next method called on variable';
      $phpcsFile->addError( $error, $stackPtr );
    }

    if ( $previous_variable['line'] !== $string_found['line']) {
      $error = 'Using expects method must be on same line as variable';
      $phpcsFile->addError( $error, $stackPtr );
    }

  } // process

} // Behance_Sniffs_Gotchas_DefaultLoggerSniff