bugfix: ensure package returned by Composer is always implementing …

…`BasePackage`

Fixes `InvalidArgumentException` with message `Only subclasses of BasePackage are supported`.

Signed-off-by: Maximilian Bösing <2189546+boesing@users.noreply.github.com>

test/ComponentInstallerTest.php

@@ -73,9 +73,6 @@ protected function setUp(): void
             vfsStream::url('project')
         );
 
-        $composer       = $this->createMock(Composer::class);
-        $this->composer = $composer;
-
         $rootPackage = $this->createMock(RootPackage::class);
 
         $this->rootPackage = $rootPackage;
@@ -85,6 +82,16 @@ protected function setUp(): void
                 return $this->rootPackageExtra;
             });
 
+        $installationManager       = $this->createMock(InstallationManager::class);
+        $this->installationManager = $installationManager;
+
+        $composer = $this->createComposerMock(
+            $installationManager,
+            $rootPackage
+        );
+
+        $this->composer = $composer;
+
         $this->rootPackage
             ->method('getProvides')
             ->willReturn([]);
@@ -129,13 +136,6 @@ protected function setUp(): void
             $this->composer,
             $this->io
         );
-
-        $installationManager       = $this->createMock(InstallationManager::class);
-        $this->installationManager = $installationManager;
-
-        $this->composer
-            ->method('getInstallationManager')
-            ->willReturn($installationManager);
     }
 
     /**
@@ -1067,12 +1067,7 @@ public function testOnPostPackageInstallPromptsForConfigOptionsWhenDefinedAsArra
 
     public function testAddPackageToConfigWillPassProjectRootAsStringToConfigDiscovery(): void
     {
-        $installationManager = $this->createMock(InstallationManager::class);
-
-        $composer = $this->createMock(Composer::class);
-        $composer
-            ->method('getInstallationManager')
-            ->willReturn($installationManager);
+        $composer = $this->createComposerMock();
 
         $io = $this->createMock(IOInterface::class);
         $io
@@ -2010,4 +2005,27 @@ public function packageUpdateScenarios(): Generator
             ],
         ];
     }
+
+    /**
+     * @return Composer&MockObject
+     */
+    private function createComposerMock(
+        ?InstallationManager $installationManager = null,
+        ?RootPackage $package = null
+    ): Composer {
+        $installationManager ??= $this->createMock(InstallationManager::class);
+        $composer              = $this->createMock(Composer::class);
+
+        $composer
+            ->method('getInstallationManager')
+            ->willReturn($installationManager);
+
+        $package ??= $this->createMock(RootPackage::class);
+
+        $composer
+            ->method('getPackage')
+            ->willReturn($package);
+
+        return $composer;
+    }
 }