test: move api buildroot test to test_buildroot.py

Create a new test suite for BuildRoot related test and move the
the combined api and buildroot check there.

test/mod/test_api.py

@@ -2,15 +2,11 @@
 # Test for API infrastructure
 #
 
-import pathlib
 import os
-import sys
 import tempfile
 import unittest
 
 import osbuild
-from osbuild.buildroot import BuildRoot
-from osbuild.monitor import NullMonitor
 from osbuild.util import jsoncomm
 
 
@@ -69,27 +65,3 @@ class TestAPI(unittest.TestCase):
             with self.assertRaises(AssertionError):
                 with api:
                     pass
-
-    def test_buildroot(self):
-        # Check API and BuildRoot integration: the runner will call
-        # api.setup_stdio and thus check that connecting to the api
-        # works correctly
-        runner = "org.osbuild.linux"
-        libdir = os.path.abspath(os.curdir)
-        var = pathlib.Path(self.tmp.name, "var")
-        var.mkdir()
-
-        monitor = NullMonitor(sys.stderr.fileno())
-        with BuildRoot("/", runner, libdir=libdir, var=var) as root:
-            api = osbuild.api.API({}, monitor)
-            root.register_api(api)
-
-            r = root.run(["/usr/bin/true"])
-            self.assertEqual(r.returncode, 0)
-
-            # Test we can use `.run` multiple times
-            r = root.run(["/usr/bin/true"])
-            self.assertEqual(r.returncode, 0)
-
-            r = root.run(["/usr/bin/false"])
-            self.assertNotEqual(r.returncode, 0)

test/mod/test_buildroot.py

@@ -0,0 +1,48 @@
+#
+# Test for the build root
+#
+
+import pathlib
+import os
+import sys
+import tempfile
+import unittest
+
+import osbuild
+from osbuild.buildroot import BuildRoot
+from osbuild.monitor import NullMonitor
+from .. import test
+
+
+@unittest.skipUnless(test.TestBase.can_bind_mount(), "root-only")
+class TestBuildRoot(test.TestBase):
+    """Check BuildRoot"""
+    def setUp(self):
+        self.tmp = tempfile.TemporaryDirectory()
+
+    def tearDown(self):
+        self.tmp.cleanup()
+
+    def test_basic(self):
+        # This also checks the API and BuildRoot integration:
+        # the runner will call api.setup_stdio and thus check
+        # that connecting to the api works correctly
+        runner = "org.osbuild.linux"
+        libdir = os.path.abspath(os.curdir)
+        var = pathlib.Path(self.tmp.name, "var")
+        var.mkdir()
+
+        monitor = NullMonitor(sys.stderr.fileno())
+        with BuildRoot("/", runner, libdir=libdir, var=var) as root:
+            api = osbuild.api.API({}, monitor)
+            root.register_api(api)
+
+            r = root.run(["/usr/bin/true"])
+            self.assertEqual(r.returncode, 0)
+
+            # Test we can use `.run` multiple times
+            r = root.run(["/usr/bin/true"])
+            self.assertEqual(r.returncode, 0)
+
+            r = root.run(["/usr/bin/false"])
+            self.assertNotEqual(r.returncode, 0)