fix(UnusedPrivateMethod): Fix case insensitivity og PHP method calls (#3398208)

coder_sniffer/DrupalPractice/Sniffs/Objects/UnusedPrivateMethodSniff.php

@@ -77,7 +77,8 @@ class UnusedPrivateMethodSniff extends AbstractScopeSniff
 
             if ($tokens[$next]['code'] === T_OBJECT_OPERATOR) {
                 $call = $phpcsFile->findNext(Tokens::$emptyTokens, ($next + 1), null, true);
-                if ($call === false || $tokens[$call]['content'] !== $methodName) {
+                // PHP method calls are case insensitive.
+                if ($call === false || strcasecmp($tokens[$call]['content'], $methodName) !== 0) {
                     continue;
                 }
 

tests/DrupalPractice/Objects/UnusedPrivateMethodUnitTest.inc

@@ -16,4 +16,18 @@ class Test {
 
   }
 
+  /**
+   * Method is called from somewhere in the class.
+   */
+  private function isUsed() {
+
+  }
+
+  /**
+   * Call method with different upper/lower case.
+   */
+  public function doCalls() {
+    $this->IsUsEd();
+  }
+
 }