Make xdist work even if looponfail or boxed are disabled

Fix #32

CHANGELOG

@@ -1,8 +1,13 @@
-1.13.2
+1.13.2.dev
--------
+----------
+
+- fix README display on pypi
 
-- fix readme display on pypi
 - fix #22: xdist now works if the internal tmpdir plugin is disabled.
+  Thanks Bruno Oliveira for the PR.
+
+- fix #32: xdist now works if looponfail or boxed are disabled.
+  Thanks Bruno Oliveira for the PR.
 
 
 1.13.1

testing/acceptance_test.py

@@ -535,6 +535,19 @@ def test_tmpdir_disabled(testdir):
     result.stdout.fnmatch_lines("*1 passed*")
 
 
+@pytest.mark.parametrize('plugin', ['xdist.looponfail', 'xdist.boxed'])
+def test_sub_plugins_disabled(testdir, plugin):
+    """Test that xdist doesn't break if we disable any of its sub-plugins. (#32)
+    """
+    p1 = testdir.makepyfile("""
+        def test_ok():
+            pass
+    """)
+    result = testdir.runpytest(p1, "-n1", '-p', 'no:%s' % plugin)
+    assert result.ret == 0
+    result.stdout.fnmatch_lines("*1 passed*")
+
+
 class TestNodeFailure:
     def test_load_single(self, testdir):
         f = testdir.makepyfile("""

xdist/looponfail.py

@@ -25,6 +25,10 @@ def pytest_addoption(parser):
 def pytest_cmdline_main(config):
 
     if config.getoption("looponfail"):
+        usepdb = config.getoption('usepdb')  # a core option
+        if usepdb:
+            raise pytest.UsageError(
+                "--pdb incompatible with --looponfail.")
         looponfail_main(config)
         return 2  # looponfail only can get stop with ctrl-C anyway
 

xdist/plugin.py

@@ -94,12 +94,8 @@ def pytest_cmdline_main(config):
         config.option.dist = "load"
     val = config.getvalue
     if not val("collectonly"):
-        usepdb = config.option.usepdb  # a core option
+        usepdb = config.getoption('usepdb')  # a core option
-        if val("looponfail"):
+        if val("dist") != "no":
-            if usepdb:
-                raise pytest.UsageError(
-                    "--pdb incompatible with --looponfail.")
-        elif val("dist") != "no":
             if usepdb:
                 raise pytest.UsageError(
                     "--pdb incompatible with distributing tests.")