[initramfs] Fix up tests

- These tests don't actually test anything in this specific module,
  they do test CalamaresUtils::System.
- Wrangling System and JobQueue and GlobalStorage instances is fraught

src/modules/initramfs/Tests.cpp

@@ -45,6 +45,9 @@ void
 InitramfsTests::initTestCase()
 {
     Logger::setupLogLevel( Logger::LOGDEBUG );
+
+    auto* j = new Calamares::JobQueue();
+    (void) new CalamaresUtils::System( true );
 }
 
 static const char contents[] = "UMASK=0077\n";
@@ -55,40 +58,21 @@ void InitramfsTests::cleanup()
     QFile::remove( confFile );
 }
 
-void InitramfsTests::testCreateHostFile()
-{
-
-    CalamaresUtils::System s( false );  // don't chroot
-    auto r = s.createTargetFile( confFile, QByteArray( contents ) );
-    QVERIFY( !r.failed() );
-    QVERIFY( r );
-    QString path = r.path();
-    QVERIFY( !path.isEmpty() );
-    QCOMPARE( path, confFile );  // don't chroot, so path create relative to /
-    QVERIFY( QFile::exists( confFile ) );
-
-    QFileInfo fi( confFile );
-    QVERIFY( fi.exists() );
-    QCOMPARE( fi.size(), sizeof( contents )-1 );  // don't count trailing NUL
-
-    QFile::remove( confFile );
-}
-
 void InitramfsTests::testCreateTargetFile()
 {
     static const char short_confFile[] = "/calamares-safe-umask";
 
-    CalamaresUtils::System s( true );
-    auto r = s.createTargetFile( short_confFile, QByteArray( contents ) );
+    auto* s = CalamaresUtils::System::instance();
+    auto r = s->createTargetFile( short_confFile, QByteArray( contents ) );
     QVERIFY( r.failed() );
     QVERIFY( !r );
     QString path = r.path();
     QVERIFY( path.isEmpty() );  // because no rootmountpoint is set
 
-    Calamares::JobQueue j;
-    j.globalStorage()->insert( "rootMountPoint", "/tmp" );
+    Calamares::JobQueue::instance()->globalStorage()->insert( "rootMountPoint", "/tmp" );
 
-    path = s.createTargetFile( short_confFile, QByteArray( contents ) );
+    path = s->createTargetFile( short_confFile, QByteArray( contents ) ).path();
+    QCOMPARE( path, QString( confFile ) );
     QVERIFY( path.endsWith( short_confFile ) );  // chroot, so path create relative to
     QVERIFY( path.startsWith( "/tmp/" ) );
     QVERIFY( QFile::exists( path ) );

src/modules/initramfs/Tests.h

@@ -31,8 +31,8 @@ public:
 private Q_SLOTS:
     void initTestCase();
     void cleanup();
-    
-    void testCreateHostFile();
+
+    // TODO: this doesn't actually test any of the functionality of this job
     void testCreateTargetFile();
 };