Readme file and feedback changes

Magento2/Sniffs/Namespaces/ImportsFromTestNamespaceSniff.md

@@ -0,0 +1,13 @@
+# Rule: Do not import from `Test` namespaces
+## Background
+Sometimes IDE imports the namespace with `Test` automatically for return data type like string, float etc or any other means.
+
+## Reasoning
+Time to time we're getting issue with running tests on PRs in magento/magento2 repository because someone imported `\Magento\Tests\NamingConvention\true\string` by mistake. As result - we have "No build reports available" for "Database Compare build", "Functional Tests build", "Sample Data Tests build" while Static tests are shown as "failing" but in results - we don't really have reason
+
+## How it works
+Any occurrence starts with `Magento\Tests` in import from the namespace will raise the warning. 
+
+## How to fix
+
+Remove `Magento\Tests` from the imported namespaces

Magento2/Sniffs/Namespaces/UseDeclarationSniff.php → Magento2/Sniffs/Namespaces/ImportsFromTestNamespaceSniff.php

@@ -11,23 +11,23 @@
 /**
  * Detects static test namespace.
  */
-class UseDeclarationSniff implements Sniff
+class ImportsFromTestNamespaceSniff implements Sniff
 {
 
     /**
      * @var string
      */
-    private $_prohibitNamespace = 'Magento\Tests';
+    private $prohibitNamespace = 'Magento\Tests';
 
     /**
      * @var string
      */
-    protected $warningMessage = 'Incorrect namespace has been imported.';
+    protected $warningMessage = 'Application modules should not use classed from test modules.';
 
     /**
      * @var string
      */
-    protected $warningCode = 'WrongImportNamespaces';
+    protected $warningCode = 'WrongImport';
 
     /**
      * @inheritdoc
@@ -44,7 +44,7 @@ public function process(File $phpcsFile, $stackPtr)
     {
         $next = $phpcsFile->findNext([T_COMMA, T_SEMICOLON, T_OPEN_USE_GROUP, T_CLOSE_TAG], ($stackPtr + 1));
         $getTokenAsContent = $phpcsFile->getTokensAsString($stackPtr, ($next - $stackPtr));
-        if (strpos($getTokenAsContent, $this->_prohibitNamespace) !== false) {
+        if (strpos($getTokenAsContent, $this->prohibitNamespace) !== false) {
             $phpcsFile->addWarning($this->warningMessage, $stackPtr, $this->warningCode);
         }
     }

Magento2/Tests/Namespaces/UseDeclarationUnitTest.inc → Magento2/Tests/Namespaces/ImportsFromTestNamespaceUnitTest.inc

@@ -1,4 +1,4 @@
 <?php
 use Magento\Tests;
 use Magento\Foo\Tests as FakeTest;
-use Magento\Real\Classes;
+use Magento\Real\Classes;

Magento2/Tests/Namespaces/UseDeclarationUnitTest.php → Magento2/Tests/Namespaces/ImportsFromTestNamespaceUnitTest.php

@@ -10,7 +10,7 @@
 /**
  * Class InterfaceNameUnitTest
  */
-class UseDeclarationUnitTest extends AbstractSniffUnitTest
+class ImportsFromTestNamespaceUnitTest extends AbstractSniffUnitTest
 {
     /**
      * @inheritdoc

Magento2/ruleset.xml

@@ -189,7 +189,7 @@
         <exclude-pattern>*Test.php</exclude-pattern>
         <exclude-pattern>*/tests/*</exclude-pattern>
     </rule>
-    <rule ref="Magento2.Namespaces.UseDeclaration">
+    <rule ref="Magento2.Namespaces.ImportsFromTestNamespaceSniff">
         <severity>8</severity>
         <type>warning</type>
     </rule>