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)