TestClassSuffixNameRule (#609)

* First stab

* PHPStan fixes

* TLC

* Comment improvement

* Rename rule to explain suffix, add behind feature flag.

* remove TestClassNameRule from rules.neon

* fix service definition

---------

Co-authored-by: Matt Glaman <nmd.matt@gmail.com>

extension.neon

@@ -19,6 +19,8 @@ parameters:
 		drupal_root: '%currentWorkingDirectory%'
 		bleedingEdge:
 			checkDeprecatedHooksInApiFiles: false
+		rules:
+			testClassSuffixNameRule: false
 		entityMapping:
 			aggregator_feed:
 				class: Drupal\aggregator\Entity\Feed
@@ -238,6 +240,9 @@ parametersSchema:
 		bleedingEdge: structure([
 			checkDeprecatedHooksInApiFiles: boolean()
 		])
+		rules: structure([
+			testClassSuffixNameRule: boolean()
+		])
 		entityMapping: arrayOf(anyOf(
 			structure([
 				class: string()

rules.neon

@@ -1,21 +1,29 @@
-rules:
-	- mglaman\PHPStanDrupal\Rules\Drupal\Coder\DiscouragedFunctionsRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\GlobalDrupalDependencyInjectionRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\PluginManager\PluginManagerSetsCacheBackendRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\AccessDeprecatedConstant
-	- mglaman\PHPStanDrupal\Rules\Classes\ClassExtendsInternalClassRule
-	- mglaman\PHPStanDrupal\Rules\Classes\PluginManagerInspectionRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\ConditionManagerCreateInstanceContextConfigurationRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\RenderCallbackRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\StaticServiceDeprecatedServiceRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\GetDeprecatedServiceRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\Tests\BrowserTestBaseDefaultThemeRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\ConfigEntityConfigExportRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\PluginAnnotationContextDefinitionsRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\ModuleLoadInclude
-	- mglaman\PHPStanDrupal\Rules\Drupal\LoadIncludes
-	- mglaman\PHPStanDrupal\Rules\Drupal\EntityQuery\EntityQueryHasAccessCheckRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRouteObjectInterfaceConstantsRule
-	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRoutingInClassMethodSignatureRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\RequestStackGetMainRequestRule
-	- mglaman\PHPStanDrupal\Rules\Drupal\TestClassesProtectedPropertyModulesRule
+rules:
+	- mglaman\PHPStanDrupal\Rules\Drupal\Coder\DiscouragedFunctionsRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\GlobalDrupalDependencyInjectionRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\PluginManager\PluginManagerSetsCacheBackendRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\AccessDeprecatedConstant
+	- mglaman\PHPStanDrupal\Rules\Classes\ClassExtendsInternalClassRule
+	- mglaman\PHPStanDrupal\Rules\Classes\PluginManagerInspectionRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\ConditionManagerCreateInstanceContextConfigurationRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\RenderCallbackRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\StaticServiceDeprecatedServiceRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\GetDeprecatedServiceRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\Tests\BrowserTestBaseDefaultThemeRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\ConfigEntityConfigExportRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\PluginAnnotationContextDefinitionsRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\ModuleLoadInclude
+	- mglaman\PHPStanDrupal\Rules\Drupal\LoadIncludes
+	- mglaman\PHPStanDrupal\Rules\Drupal\EntityQuery\EntityQueryHasAccessCheckRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRouteObjectInterfaceConstantsRule
+	- mglaman\PHPStanDrupal\Rules\Deprecations\SymfonyCmfRoutingInClassMethodSignatureRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\RequestStackGetMainRequestRule
+	- mglaman\PHPStanDrupal\Rules\Drupal\TestClassesProtectedPropertyModulesRule
+
+conditionalTags:
+	mglaman\PHPStanDrupal\Rules\Drupal\Tests\TestClassSuffixNameRule:
+		phpstan.rules.rule: %drupal.rules.testClassSuffixNameRule%
+
+services:
+	-
+		class: mglaman\PHPStanDrupal\Rules\Drupal\Tests\TestClassSuffixNameRule

src/Rules/Drupal/Tests/TestClassSuffixNameRule.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Rules\Drupal\Tests;
+
+use PhpParser\Node;
+use PHPStan\Analyser\Scope;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
+use PHPStan\Type\ObjectType;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Implements rule that all non-abstract test classes name should end with "Test".
+ *
+ * @implements Rule<Node\Stmt\Class_>
+ */
+final class TestClassSuffixNameRule implements Rule
+{
+
+    public function getNodeType(): string
+    {
+        return Node\Stmt\Class_::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        // We're not interested in non-extending classes.
+        if ($node->extends === null) {
+            return [];
+        }
+
+        // We're not interested in abstract classes.
+        if ($node->isAbstract()) {
+            return [];
+        }
+
+        // We need a namespaced class name.
+        if ($node->namespacedName === null) {
+            return [];
+        }
+
+        // We're only interested in \PHPUnit\Framework\TestCase subtype classes.
+        $classType = $scope->resolveTypeByName($node->namespacedName);
+        $phpUnitFrameworkTestCaseType = new ObjectType(TestCase::class);
+        if (!$phpUnitFrameworkTestCaseType->isSuperTypeOf($classType)->yes()) {
+            return [];
+        }
+
+        // Check class name has suffix "Test".
+        // @todo replace this str_ends_with() when php 8 is required.
+        if (substr_compare($node->namespacedName->getLast(), 'Test', -4) === 0) {
+            return [];
+        }
+
+        return [
+                RuleErrorBuilder::message(
+                    sprintf(
+                        'Non-abstract test classes names should always have the suffix "Test", found incorrect class name "%s".',
+                        $node->name,
+                    )
+                )
+                ->line($node->getStartLine())
+                ->tip('See https://www.drupal.org/docs/develop/standards/php/object-oriented-code#naming')
+                ->build()
+        ];
+    }
+}

tests/src/Rules/TestClassSuffixNameRuleTest.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace mglaman\PHPStanDrupal\Tests\Rules;
+
+use mglaman\PHPStanDrupal\Rules\Drupal\Tests\TestClassSuffixNameRule;
+use mglaman\PHPStanDrupal\Tests\DrupalRuleTestCase;
+use PHPStan\Rules\Rule;
+
+class TestClassSuffixNameRuleTest extends DrupalRuleTestCase
+{
+
+    protected function getRule(): Rule
+    {
+        return new TestClassSuffixNameRule();
+    }
+
+    /**
+     * @dataProvider fileData
+     */
+    public function testRule(string $path, array $errorMessages): void
+    {
+        $this->analyse(
+            [$path],
+            $errorMessages
+        );
+    }
+
+    public function fileData(): \Generator
+    {
+        yield [
+            __DIR__ . '/data/test-cases-TestClassSuffixNameRule.php',
+            [
+                [
+                    'Non-abstract test classes names should always have the suffix "Test", found incorrect class name "IncorrectlyNamedDirectlyExtendingPHPUnitFrameworkTestCaseClass".',
+                    29,
+                    'See https://www.drupal.org/docs/develop/standards/php/object-oriented-code#naming'
+                ],
+                [
+                    'Non-abstract test classes names should always have the suffix "Test", found incorrect class name "IncorrectlyNamedIndirectlyExtendingPHPUnitFrameworkTestCaseClass".',
+                    39,
+                    'See https://www.drupal.org/docs/develop/standards/php/object-oriented-code#naming'
+                ],
+            ]
+        ];
+    }
+
+}

tests/src/Rules/data/test-cases-TestClassSuffixNameRule.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace TestCasesTestClassSuffixNameRule;
+
+use Drupal\node\Entity\Node;
+use Drupal\Tests\views\Functional\ViewTestBase;
+use PHPUnit\Framework\TestCase;
+
+class IgnoreNonExtendingClasses
+{
+
+}
+
+abstract class IgnoreAbstractClasses extends TestCase
+{
+
+}
+
+class IgnoreNonPHPUnitFrameworkTestCaseExtendingClasses extends Node
+{
+
+}
+
+class CorrectlyNamedDirectlyExtendingPHPUnitFrameworkTestCaseTest extends TestCase
+{
+
+}
+
+class IncorrectlyNamedDirectlyExtendingPHPUnitFrameworkTestCaseClass extends TestCase
+{
+
+}
+
+class CorrectlyNamedIndirectlyExtendingPHPUnitFrameworkTestCaseTest extends ViewTestBase
+{
+
+}
+
+class IncorrectlyNamedIndirectlyExtendingPHPUnitFrameworkTestCaseClass extends ViewTestBase
+{
+
+}