move test files out of py lib proper

* separate all tests from plugins
* simplify implicit inclusion of plugins under test
* have test_initpkg perform direct checks instead of yielding tests
* fix example tests for 3k

--HG--
branch : trunk

testing/process/test_cmdexec.py

@@ -0,0 +1,43 @@
+import py
+from py.process import cmdexec
+
+def exvalue():
+    return py.std.sys.exc_info()[1]
+
+class Test_exec_cmd:
+    def test_simple(self):
+        out = cmdexec('echo hallo')
+        assert out.strip() == 'hallo'
+
+    def test_simple_error(self):
+        py.test.raises (cmdexec.Error, cmdexec, 'exit 1')
+
+    def test_simple_error_exact_status(self):
+        try:
+            cmdexec('exit 1')
+        except cmdexec.Error:
+            e = exvalue()
+            assert e.status == 1
+
+    def test_err(self):
+        try:
+            cmdexec('echoqweqwe123 hallo')
+            raise AssertionError("command succeeded but shouldn't")
+        except cmdexec.Error:
+            e = exvalue()
+            assert hasattr(e, 'err')
+            assert hasattr(e, 'out')
+            assert e.err or e.out
+
+def test_cmdexec_selection():
+    from py.__.process import cmdexec 
+    if py.std.sys.platform == "win32":
+        assert py.process.cmdexec == cmdexec.win32_exec_cmd
+    elif hasattr(py.std.sys, 'pypy') or hasattr(py.std.sys, 'pypy_objspaceclass'):
+        assert py.process.cmdexec == cmdexec.popen3_exec_cmd
+    else:
+        assert py.process.cmdexec == cmdexec.posix_exec_cmd
+        
+        
+        
+