tests: Add pytest conftest.py

Makes 'pytest' and 'pytest --cov' work for the standard tests.
uitests run with `pytest --uitests --cov=virtManager`.
test_urls.py, test_dist.py, test_inject.py need to be invoked like

pytest $PATH

Signed-off-by: Cole Robinson <crobinso@redhat.com>

.coveragerc

@@ -1,4 +1,10 @@
+[run]
+source=virtinst/
+omit=virtinst/progress.py
+
 [report]
+skip_covered = yes
+
 exclude_lines =
     # Have to re-enable the standard pragma
     pragma: no cover

setup.py

@@ -410,7 +410,7 @@ class TestBaseCommand(distutils.core.Command):
         if self.coverage:
             import coverage
             omit = ["/usr/*", "/*/tests/*", "*progress.py"]
-            cov = coverage.coverage(omit=omit)
+            cov = coverage.coverage()
             cov.erase()
             if not self._external_coverage:
                 cov.start()

tests/conftest.py

@@ -0,0 +1,55 @@
+# This work is licensed under the GNU GPLv2 or later.
+# See the COPYING file in the top-level directory.
+
+import os
+
+import pytest
+
+
+def pytest_addoption(parser):
+    parser.addoption("--uitests", action="store_true", default=False,
+            help="Run dogtail UI tests")
+
+
+def pytest_ignore_collect(path, config):
+    uitests_requested = config.getoption("--uitests")
+
+    # Unless explicitly requested, ignore these tests
+    if "test_dist.py" in str(path):
+        return True
+    if "test_urls.py" in str(path):
+        return True
+    if "test_inject.py" in str(path):
+        return True
+
+    uitest_file = "tests/uitests" in str(path)
+    if uitest_file and not uitests_requested:
+        return True
+    if not uitest_file and uitests_requested:
+        return True
+
+
+def pytest_collection_modifyitems(config, items):
+    def find_items(basename):
+        return [i for i in items
+                if os.path.basename(i.fspath) == basename]
+
+    # Move test_cli cases to the end, because they are slow
+    # Move test_checkprops to the very end, because it needs to run
+    #   after everything else to give proper results
+    cliitems = find_items("test_cli.py")
+    chkitems = find_items("test_checkprops.py")
+
+    for i in cliitems + chkitems:
+        items.remove(i)
+        items.append(i)
+
+    if not find_items("test_urls.py"):
+        # Don't setup urlfetcher mocking for test_urls.py
+        # All other tests need it
+        import tests.urlfetcher_mock
+        tests.urlfetcher_mock.setup_mock()
+
+    if find_items("test_inject.py"):
+        if not config.getoption("--capture") == "no":
+            pytest.fail("test_inject.py requires `pytest --capture=no`")