#142 : [New Rule] No imports from static tests namespaces

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/ImportsFromTestNamespaceSniff.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Sniffs\Namespaces;
+
+use PHP_CodeSniffer\Sniffs\Sniff;
+use PHP_CodeSniffer\Files\File;
+use PHP_CodeSniffer\Util\Tokens;
+
+/**
+ * Detects static test namespace.
+ */
+class ImportsFromTestNamespaceSniff implements Sniff
+{
+    /**
+     * @var string
+     */
+    private $prohibitNamespace = 'Magento\Tests';
+
+    /**
+     * @var string
+     */
+    protected $warningMessage = 'Application modules should not use classed from test modules.';
+
+    /**
+     * @var string
+     */
+    protected $warningCode = 'WrongImport';
+
+    /**
+     * @inheritdoc
+     */
+    public function register()
+    {
+        return [T_USE];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function process(File $phpcsFile, $stackPtr)
+    {
+        $next = $phpcsFile->findNext([T_COMMA, T_SEMICOLON, T_OPEN_USE_GROUP, T_CLOSE_TAG], ($stackPtr + 1));
+        $tokens = $phpcsFile->getTokens();
+        $getTokenAsContent = $phpcsFile->getTokensAsString($stackPtr, ($next - $stackPtr));
+        if (strpos($getTokenAsContent, $this->prohibitNamespace) !== false) {
+            $phpcsFile->addWarning($this->warningMessage, $stackPtr, $this->warningCode);
+        }
+        if ($next !== false
+            && $tokens[$next]['code'] !== T_SEMICOLON
+            && $tokens[$next]['code'] !== T_CLOSE_TAG
+        ) {
+            $baseUse  = rtrim($phpcsFile->getTokensAsString($stackPtr, ($next - $stackPtr)));
+            $baseUse = str_replace('use \\', '', $baseUse);
+            $closingCurly = $phpcsFile->findNext(T_CLOSE_USE_GROUP, ($next + 1));
+            do {
+                $next = $phpcsFile->findNext(Tokens::$emptyTokens, ($next + 1), $closingCurly, true);
+                $groupedAsContent = $baseUse. $tokens[$next]['content'];
+                $next = $phpcsFile->findNext(T_COMMA, ($next + 1), $closingCurly);
+                if (strpos($groupedAsContent, $this->prohibitNamespace) !== false) {
+                    $phpcsFile->addWarning($this->warningMessage, $stackPtr, $this->warningCode);
+                    return;
+                }
+            } while ($next !== false);
+        }
+    }
+}

Magento2/Tests/Namespaces/ImportsFromTestNamespaceUnitTest.inc

@@ -0,0 +1,6 @@
+<?php
+use Magento\Tests;
+use Magento\Foo\Tests as FakeTest;
+use Magento\Real\Classes;
+use \Magento\{Tests\String, Tests\Int};
+use \Magento\{Foo\string, Bar\float};

Magento2/Tests/Namespaces/ImportsFromTestNamespaceUnitTest.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Namespaces;
+
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
+
+/**
+ * Class InterfaceNameUnitTest
+ */
+class ImportsFromTestNamespaceUnitTest extends AbstractSniffUnitTest
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList()
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList()
+    {
+        return [
+            2 => 1,
+            5 => 1
+        ];
+    }
+}

Magento2/ruleset.xml

@@ -189,6 +189,15 @@
         <exclude-pattern>*Test.php</exclude-pattern>
         <exclude-pattern>*/tests/*</exclude-pattern>
     </rule>
+    <rule ref="Magento2.Namespaces.ImportsFromTestNamespace">
+        <severity>8</severity>
+        <type>warning</type>
+        <exclude-pattern>*/_files/*</exclude-pattern>
+        <exclude-pattern>*/Fixtures/*</exclude-pattern>
+        <exclude-pattern>*/Test/*</exclude-pattern>
+        <exclude-pattern>*Test.php</exclude-pattern>
+        <exclude-pattern>*/tests/*</exclude-pattern>
+    </rule>
     <rule ref="Magento2.NamingConvention.InterfaceName">
         <severity>8</severity>
         <type>warning</type>