Issue #3317815 by omkar.podey, tedbow: Remove all fixtures except for one: `fake_site`

automatic_updates_extensions/tests/src/Build/ModuleUpdateTest.php

@@ -40,7 +40,7 @@ class ModuleUpdateTest extends UpdateTestBase {
 \$config['update_test.settings']['system_info'] = $system_info;
 END;
     $this->writeSettings($code);
-    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../../../package_manager/tests/fixtures/alpha/1.0.0'));
+    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../../../package_manager/tests/fixtures/build_test_projects/alpha/1.0.0'));
     $this->runComposer('COMPOSER_MIRROR_PATH_REPOS=1 composer require drupal/alpha --update-with-all-dependencies', 'project');
     $this->assertModuleVersion('alpha', '1.0.0');
     $fs = new SymfonyFilesystem();
@@ -52,7 +52,7 @@ END;
     ]);
 
     // Change both modules' upstream version.
-    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../../../package_manager/tests/fixtures/alpha/1.1.0'));
+    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../../../package_manager/tests/fixtures/build_test_projects/alpha/1.1.0'));
   }
 
   /**

package_manager/tests/fixtures/build_test_projects/README.md

+# Why do we need the `updated_module` fixtures?
+Because there is a need to thoroughly test the updating of a module. See `\Drupal\Tests\package_manager\Build\PackageUpdateTest`.
+
+This requires 2 versions (`1.0.0` and `1.1.0`) of the same module (`updated_module`), each with a different code bases.
+
+The test updates from one version to the next, and verifies the updated module's code base is actually used after the update: it verifies the updated logic of version of `\Drupal\updated_module\PostApplySubscriber` is being executed.
+
+`\Drupal\fixture_manipulator\FixtureManipulator` cannot manipulate code nor does it modify the file system: it only creates a "skeleton" extension. (See `\Drupal\fixture_manipulator\FixtureManipulator::addProjectAtPath()`.)
+
+# Why do we need the `alpha` fixtures?
+To be able to test that `php-tuf/composer-stager` indeed only updates the package for which an update was requested (even though more updates are available), no fixture manipulation is allowed to occur. This requires updating a `path` composer package repository to first serve contain one version of a package, and then another. That is what these fixtures are used for.
+

package_manager/tests/src/Build/PackageInstallTest.php

@@ -21,7 +21,7 @@ class PackageInstallTest extends TemplateProjectTestBase {
     $this->setReleaseMetadata([
       'alpha' => __DIR__ . '/../../fixtures/release-history/alpha.1.1.0.xml',
     ]);
-    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/alpha/1.0.0'));
+    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/build_test_projects/alpha/1.0.0'));
 
     // Use the API endpoint to create a stage and install alpha 1.0.0. We ask
     // the API to return the contents of composer.json file of installed module,

package_manager/tests/src/Build/PackageUpdateTest.php

@@ -20,8 +20,8 @@ class PackageUpdateTest extends TemplateProjectTestBase {
   public function testPackageUpdate(): void {
     $this->createTestProject('RecommendedProject');
 
-    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/alpha/1.0.0'));
-    $this->addRepository('updated_module', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/updated_module/1.0.0'));
+    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/build_test_projects/alpha/1.0.0'));
+    $this->addRepository('updated_module', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/build_test_projects/updated_module/1.0.0'));
     $this->setReleaseMetadata([
       'updated_module' => __DIR__ . '/../../fixtures/release-history/updated_module.1.1.0.xml',
     ]);
@@ -32,8 +32,8 @@ class PackageUpdateTest extends TemplateProjectTestBase {
     $this->installModules(['updated_module']);
 
     // Change both modules' upstream version.
-    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/alpha/1.1.0'));
-    $this->addRepository('updated_module', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/updated_module/1.1.0'));
+    $this->addRepository('alpha', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/build_test_projects/alpha/1.1.0'));
+    $this->addRepository('updated_module', $this->copyFixtureToTempDirectory(__DIR__ . '/../../fixtures/build_test_projects/updated_module/1.1.0'));
     // Make .git folder
 
     // Use the API endpoint to create a stage and update updated_module to