[netinstall] Extend tests with YAML syntax error and no-files-at-all

src/modules/netinstall/Tests.cpp

@@ -342,9 +342,11 @@ ItemTests::testUrlFallback_data()
 
     using S = Config::Status;
 
-    QTest::newRow( "bad" ) << "1a-single-bad.conf" << smash( S::FailedBadData ) << 0;
+    QTest::newRow( "bad" ) << "1a-single-bad.conf" << smash( S::FailedBadConfiguration ) << 0;
     QTest::newRow( "empty" ) << "1a-single-empty.conf" << smash( S::FailedNoData ) << 0;
+    QTest::newRow( "error" ) << "1a-single-error.conf" << smash( S::FailedBadData ) << 0;
     QTest::newRow( "second" ) << "1b-single-small.conf" << smash( S::Ok ) << 2;
+    QTest::newRow( "none" ) << "1c-none.conf" << smash( S::FailedNoData ) << 0;
 }
 
 void

src/modules/netinstall/tests/1a-single-error.conf

@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: no
+# SPDX-License-Identifier: CC0-1.0
+#
+---
+required: true
+groupsUrl:
+    - file://$TESTDIR/data-error.yaml

src/modules/netinstall/tests/1c-none.conf

@@ -0,0 +1,6 @@
+# SPDX-FileCopyrightText: no
+# SPDX-License-Identifier: CC0-1.0
+#
+---
+required: true
+groupsUrl: []

src/modules/netinstall/tests/data-error.yaml

@@ -0,0 +1,5 @@
+derp
+derp
+herpa-derp: no
+--
+# This file is not valid YAML