* don't add distributed command line options when 'execnet' is not

installed, report a nice message.

* fix tests and code to work with non-existing execnet

* point execnet doc to the new package

--HG--
branch : trunk

testing/pytest/dist/conftest.py

@@ -0,0 +1,4 @@
+try:
+    import execnet
+except ImportError:
+    collect_ignore = ['.']

testing/pytest/looponfail/test_remote.py

@@ -1,4 +1,5 @@
 import py
+py.test.importorskip("execnet")
 from py.__.test.looponfail.remote import LooponfailingSession, LoopState, RemoteControl 
 
 class TestRemoteControl:

testing/pytest/plugin/test_pytest_default.py

@@ -10,6 +10,7 @@ def test_implied_different_sessions(tmpdir):
             return Exception
         return getattr(config._sessionclass, '__name__', None)
     assert x() == None
+    py.test.importorskip("execnet")
     assert x('-d') == 'DSession'
     assert x('--dist=each') == 'DSession'
     assert x('-n3') == 'DSession'
@@ -31,6 +32,8 @@ def test_plugin_already_exists(testdir):
 
 
 class TestDistOptions:
+    def setup_method(self, method):
+        py.test.importorskip("execnet")
     def test_getxspecs(self, testdir):
         config = testdir.parseconfigure("--tx=popen", "--tx", "ssh=xyz")
         xspecs = config.getxspecs()
@@ -64,13 +67,13 @@ class TestDistOptions:
         assert py.path.local('z') in roots 
         assert testdir.tmpdir.join('x') in roots 
 
-def test_dist_options(testdir):
-    config = testdir.parseconfigure("-n 2")
-    assert config.option.dist == "load"
-    assert config.option.tx == ['popen'] * 2
-    
-    config = testdir.parseconfigure("-d")
-    assert config.option.dist == "load"
+    def test_dist_options(self, testdir):
+        config = testdir.parseconfigure("-n 2")
+        assert config.option.dist == "load"
+        assert config.option.tx == ['popen'] * 2
+        
+        config = testdir.parseconfigure("-d")
+        assert config.option.dist == "load"
 
 def test_pytest_report_iteminfo():
     class FakeItem(object):

testing/pytest/plugin/test_pytest_pdb.py

@@ -44,7 +44,8 @@ class TestPDB:
         if child.isalive(): 
             child.wait()
 
-    def test_incompatibility_messages(self, testdir):
+    def test_dist_incompatibility_messages(self, testdir):
+        py.test.importorskip("execnet")
         Error = py.test.config.Error
         py.test.raises(Error, "testdir.parseconfigure('--pdb', '--looponfail')")
         result = testdir.runpytest("--pdb", "-n", "3")

testing/pytest/plugin/test_pytest_terminal.py

@@ -3,6 +3,10 @@ terminal reporting of the full testing process.
 """
 import py
 import sys
+try:
+    import execnet
+except ImportError:
+    execnet = None
 
 # ===============================================================================
 # plugin tests 
@@ -42,7 +46,7 @@ def pytest_generate_tests(metafunc):
             funcargs={'option': Option(verbose=True)}
         )
         nodist = getattr(metafunc.function, 'nodist', False)
-        if not nodist:
+        if execnet and not nodist:
             metafunc.addcall(
                 id="verbose-dist", 
                 funcargs={'option': Option(dist='each', verbose=True)}
@@ -602,9 +606,10 @@ class TestTerminalFunctional:
             "*test_verbose_reporting.py:10: test_gen*FAIL*",
         ])
         assert result.ret == 1
-        result = testdir.runpytest(p1, '-v', '-n 1')
-        result.stdout.fnmatch_lines([
-            "*FAIL*test_verbose_reporting.py:2: test_fail*", 
-        ])
-        assert result.ret == 1
+        if execnet:
+            result = testdir.runpytest(p1, '-v', '-n 1')
+            result.stdout.fnmatch_lines([
+                "*FAIL*test_verbose_reporting.py:2: test_fail*", 
+            ])
+            assert result.ret == 1
 

testing/pytest/test_config.py

@@ -218,6 +218,7 @@ class TestOptionEffects:
         config = py.test.config._reparse([tmpdir])
         config.initsession()
         assert not config.option.boxed
+        py.test.importorskip("execnet")
         config = py.test.config._reparse(['-d', tmpdir])
         config.initsession()
         assert not config.option.boxed

testing/pytest/test_parseopt.py

@@ -8,6 +8,12 @@ class TestParser:
         out, err = capsys.readouterr()
         assert out.find("xyz") != -1
 
+    def test_epilog(self):
+        parser = parseopt.Parser()
+        assert not parser.epilog 
+        parser.epilog += "hello"
+        assert parser.epilog == "hello"
+
     def test_group_add_and_get(self):
         parser = parseopt.Parser()
         group = parser.addgroup("hello", description="desc")
@@ -70,6 +76,15 @@ class TestParser:
         args = parser.parse_setoption([], option)
         assert option.hello == "x"
 
+    def test_parser_epilog(self, testdir):
+        testdir.makeconftest("""
+            def pytest_addoption(parser):
+                parser.epilog = "hello world"
+        """)
+        result = testdir.runpytest('--help')
+        #assert result.ret != 0
+        assert result.stdout.fnmatch_lines(["*hello world*"])
+
     def test_parse_setoption(self):
         parser = parseopt.Parser()
         parser.addoption("--hello", dest="hello", action="store")