Issue #3310936 by phenaproxima: Replace packages_comparison fixture with a...

Issue #3310936 by phenaproxima: Replace packages_comparison fixture with a unit test that mocks ComposerUtility::getInstalledPackages()

package_manager/tests/fixtures/packages_comparison/active/composer.json

-{}

package_manager/tests/fixtures/packages_comparison/active/vendor/composer/installed.json

-{
-  "packages": [
-    {
-      "name": "drupal/existing",
-      "version": "1.0.0"
-    },
-    {
-      "name": "drupal/updated",
-      "version": "1.0.0"
-    },
-    {
-      "name": "drupal/removed",
-      "version": "1.0.0"
-    }
-  ]
-}

package_manager/tests/fixtures/packages_comparison/stage/composer.json

-{}

package_manager/tests/fixtures/packages_comparison/stage/vendor/composer/installed.json

-{
-  "packages": [
-    {
-      "name": "drupal/existing",
-      "version": "1.0.0"
-    },
-    {
-      "name": "drupal/updated",
-      "version": "1.1.0"
-    },
-    {
-      "name": "drupal/added",
-      "version": "1.0.0"
-    }
-  ]
-}

package_manager/tests/src/Kernel/ComposerUtilityTest.php

@@ -43,25 +43,6 @@ class ComposerUtilityTest extends KernelTestBase {
     $this->assertFileDoesNotExist($dir . '/.htaccess');
   }
 
-  /**
-   * @covers ::getPackagesNotIn
-   * @covers ::getPackagesWithDifferentVersionsIn
-   */
-  public function testPackageComparison(): void {
-    $fixture_dir = __DIR__ . '/../../fixtures/packages_comparison';
-    $active = ComposerUtility::createForDirectory($fixture_dir . '/active');
-    $staged = ComposerUtility::createForDirectory($fixture_dir . '/stage');
-
-    $added = $staged->getPackagesNotIn($active);
-    $this->assertSame(['drupal/added'], array_keys($added));
-
-    $removed = $active->getPackagesNotIn($staged);
-    $this->assertSame(['drupal/removed'], array_keys($removed));
-
-    $updated = $active->getPackagesWithDifferentVersionsIn($staged);
-    $this->assertSame(['drupal/updated'], array_keys($updated));
-  }
-
   /**
    * @covers ::getProjectForPackage
    *

package_manager/tests/src/Unit/ComposerUtilityTest.php

@@ -52,6 +52,32 @@ class ComposerUtilityTest extends UnitTestCase {
     $this->assertSame($expected_core_package_names, array_keys($core_packages));
   }
 
+  /**
+   * @covers ::getPackagesNotIn
+   * @covers ::getPackagesWithDifferentVersionsIn
+   */
+  public function testPackageComparison(): void {
+    $active = $this->mockUtilityWithPackages([
+      'drupal/existing' => '1.0.0',
+      'drupal/updated' => '1.0.0',
+      'drupal/removed' => '1.0.0',
+    ]);
+    $staged = $this->mockUtilityWithPackages([
+      'drupal/existing' => '1.0.0',
+      'drupal/updated' => '1.1.0',
+      'drupal/added' => '1.0.0',
+    ]);
+
+    $added = $staged->getPackagesNotIn($active);
+    $this->assertSame(['drupal/added'], array_keys($added));
+
+    $removed = $active->getPackagesNotIn($staged);
+    $this->assertSame(['drupal/removed'], array_keys($removed));
+
+    $updated = $active->getPackagesWithDifferentVersionsIn($staged);
+    $this->assertSame(['drupal/updated'], array_keys($updated));
+  }
+
   /**
    * Mocks a ComposerUtility object to return a set of installed packages.
    *