TASK: Migrate IsACallSniff

* Add further tests with quotes.
* Handle prefix in strings.
* Remove old originalTokenContent which is no longer in use, as we use
  str_replace, introduced in earlier commit.

Relates: #72

src/Standards/Typo3Update/Feature/LegacyClassnameFeature.php

@@ -49,15 +49,6 @@ class LegacyClassnameFeature implements FeatureInterface
      */
     protected $sniff;
 
-    /**
-     * Used by some sniffs to keep original token for replacement.
-     *
-     * E.g. when Token itself is a whole inline comment, and we just want to replace the classname within.
-     *
-     * @var string
-     */
-    protected $originalTokenContent = '';
-
     public function __construct(PhpCsSniff $sniff)
     {
         $this->sniff = $sniff;
@@ -188,40 +179,22 @@ class LegacyClassnameFeature implements FeatureInterface
         $classname
     ) {
         $prefix = '\\';
-        if ($this->forceEmptyPrefix() || $phpcsFile->getTokens()[$classnamePosition -1]['code'] === T_NS_SEPARATOR) {
+        if ($this->useEmptyPrefix($phpcsFile, $classnamePosition)) {
             $prefix = '';
         }
 
-        $phpcsFile->fixer->replaceToken(
-            $classnamePosition,
-            str_replace(
+        $newClassname = str_replace(
             $classname,
             $prefix . $this->getNewClassname($classname),
             $phpcsFile->getTokens()[$classnamePosition]['content']
-            )
         );
+
+        // Handle double quotes, with special escaping.
+        if ($newClassname[0] === '"') {
+            $newClassname = '"\\\\' . str_replace('\\', '\\\\', ltrim(substr($newClassname, 1), '\\'));
         }
 
-    /**
-     * Use this inside your getTokenForReplacement if $classname is inside a string.
-     * Strings will be converted to single quotes.
-     *
-     * @param string $classname
-     * @return string
-     */
-    protected function getTokenReplacementForString($classname)
-    {
-        $stringSign = $this->originalTokenContent[0];
-        $token = explode($stringSign, $this->originalTokenContent);
-        $token[1] = $classname;
-
-        // Migrate double quote to single quote.
-        // This way no escaping of backslashes in class names is necessary.
-        if ($stringSign === '"') {
-            $stringSign = "'";
-        }
-
-        return implode($stringSign, $token);
+        $phpcsFile->fixer->replaceToken($classnamePosition, $newClassname);
     }
 
     /**
@@ -229,11 +202,22 @@ class LegacyClassnameFeature implements FeatureInterface
      *
      * @return bool
      */
-    protected function forceEmptyPrefix()
+    protected function useEmptyPrefix(PhpCsFile $phpcsFile, $classnamePosition)
     {
+        // Use statements don't start with T_NS_SEPARATOR.
         if (get_class($this->sniff) === \Typo3Update_Sniffs_Classname_UseSniff::class) {
             return true;
         }
+        // If T_NS_SEPARATOR is already present before, don't add again.
+        if ($phpcsFile->getTokens()[$classnamePosition -1]['code'] === T_NS_SEPARATOR) {
+            return true;
+        }
+        // If inside string starting with T_NS_SEPARATOR don't add again.
+        if (isset($phpcsFile->getTokens()[$classnamePosition]['content'][1])
+            && $phpcsFile->getTokens()[$classnamePosition]['content'][1] === '\\'
+        ) {
+            return true;
+        }
 
         return false;
     }

tests/Fixtures/Standards/Typo3Update/Sniffs/Classname/IsACallSniff/Expected.diff

@@ -1,6 +1,6 @@
 --- tests/Fixtures/Standards/Typo3Update/Sniffs/Classname/IsACallSniff/InputFileForIssues.php
 +++ PHP_CodeSniffer
-@@ -23,9 +23,9 @@
+@@ -23,15 +23,15 @@
  if (is_a($a, t3lib_Singleton::class)) {
      // do something
  }
@@ -12,3 +12,11 @@
 +if (is_a($a, '\TYPO3\CMS\Core\SingletonInterface')) {
      // do something
  }
+-if (is_a($a, "t3lib_Singleton")) {
++if (is_a($a, "\\TYPO3\\CMS\\Core\\SingletonInterface")) {
+     // do something
+ }
+-if (is_a($a, "\\t3lib_Singleton")) {
++if (is_a($a, "\\TYPO3\\CMS\\Core\\SingletonInterface")) {
+     // do something
+ }

tests/Fixtures/Standards/Typo3Update/Sniffs/Classname/IsACallSniff/Expected.json

@@ -1,7 +1,7 @@
 {
     "files": {
         "InputFileForIssues.php": {
-            "errors": 2,
+            "errors": 4,
             "messages": [
                 {
                     "column": 14,
@@ -20,14 +20,32 @@
                     "severity": 5,
                     "source": "Typo3Update.Classname.IsACall.legacyClassname",
                     "type": "ERROR"
+                },
+                {
+                    "column": 14,
+                    "fixable": true,
+                    "line": 32,
+                    "message": "Legacy classes are not allowed; found \"t3lib_Singleton\", use \"TYPO3\\CMS\\Core\\SingletonInterface\" instead",
+                    "severity": 5,
+                    "source": "Typo3Update.Classname.IsACall.legacyClassname",
+                    "type": "ERROR"
+                },
+                {
+                    "column": 14,
+                    "fixable": true,
+                    "line": 35,
+                    "message": "Legacy classes are not allowed; found \"t3lib_Singleton\", use \"TYPO3\\CMS\\Core\\SingletonInterface\" instead",
+                    "severity": 5,
+                    "source": "Typo3Update.Classname.IsACall.legacyClassname",
+                    "type": "ERROR"
                 }
             ],
             "warnings": 0
         }
     },
     "totals": {
-        "errors": 2,
-        "fixable": 2,
+        "errors": 4,
+        "fixable": 4,
         "warnings": 0
     }
 }

tests/Fixtures/Standards/Typo3Update/Sniffs/Classname/IsACallSniff/InputFileForIssues.php

@@ -29,3 +29,9 @@ if (is_a($a, 't3lib_Singleton')) {
 if (is_a($a, '\t3lib_Singleton')) {
     // do something
 }
+if (is_a($a, "t3lib_Singleton")) {
+    // do something
+}
+if (is_a($a, "\\t3lib_Singleton")) {
+    // do something
+}