adding internal repr for debugging

adding an example for generating multi-args/multi python tests

--HG--
branch : trunk

example/funcarg/test_multi_python.py

@@ -0,0 +1,65 @@
+"""
+
+module containing a parametrized tests testing cross-python
+serialization via the pickle module. 
+"""
+import py
+
+pythonlist = ['python2.3', 'python2.4', 'python2.5', 'python2.6'] 
+# 'jython' 'python3.1']
+  
+def pytest_generate_tests(metafunc):
+    if 'python1' in metafunc.funcargnames:
+        assert 'python2' in metafunc.funcargnames
+        for obj in metafunc.function.multiarg.obj:
+            for py1 in pythonlist:
+                for py2 in pythonlist:
+                    metafunc.addcall(id="%s-%s-%s" % (py1, py2, obj), 
+                        param=(py1, py2, obj))
+        
+@py.test.mark.multiarg(obj=[42, {}, {1:3},])
+def test_basic_objects(python1, python2, obj):
+    python1.dumps(obj)
+    python2.load_and_is_true("obj == %s" % obj)
+
+def pytest_funcarg__python1(request):
+    tmpdir = request.getfuncargvalue("tmpdir")
+    picklefile = tmpdir.join("data.pickle")
+    return Python(request.param[0], picklefile)
+
+def pytest_funcarg__python2(request):
+    python1 = request.getfuncargvalue("python1")
+    return Python(request.param[1], python1.picklefile)
+
+def pytest_funcarg__obj(request):
+    return request.param[2]
+
+class Python:
+    def __init__(self, version, picklefile):
+        self.pythonpath = py.path.local.sysfind(version)
+        if not self.pythonpath:
+            py.test.skip("%r not found" %(version,))
+        self.picklefile = picklefile
+    def dumps(self, obj):
+        dumpfile = self.picklefile.dirpath("dump.py")
+        dumpfile.write(py.code.Source("""
+            import pickle
+            f = open(%r, 'wb')
+            s = pickle.dump(%r, f)
+            f.close()
+        """ % (str(self.picklefile), obj)))
+        py.process.cmdexec("%s %s" %(self.pythonpath, dumpfile))
+        
+    def load_and_is_true(self, expression):
+        loadfile = self.picklefile.dirpath("load.py")
+        loadfile.write(py.code.Source("""
+            import pickle
+            f = open(%r, 'rb')
+            obj = pickle.load(f)
+            f.close()
+            res = eval(%r)
+            if not res:
+                raise SystemExit(1)
+        """ % (str(self.picklefile), expression)))
+        print loadfile
+        py.process.cmdexec("%s %s" %(self.pythonpath, loadfile))

py/test/funcargs.py

@@ -23,6 +23,9 @@ class CallSpec:
         self.id = id
         if param is not _notexists:
             self.param = param 
+    def __repr__(self):
+        return "<CallSpec id=%r param=%r funcargs=%r>" %(
+            self.id, getattr(self, 'param', '?'), self.funcargs)
 
 class Metafunc:
     def __init__(self, function, config=None, cls=None, module=None):

testing/pytest/test_funcargs.py

@@ -17,6 +17,12 @@ def test_getfuncargnames():
     if sys.version_info < (3,0):
         assert funcargs.getfuncargnames(A.f) == ['arg1']
 
+def test_callspec_repr():
+    cs = funcargs.CallSpec({}, 'hello', 1)
+    repr(cs) 
+    cs = funcargs.CallSpec({}, 'hello', funcargs._notexists)
+    repr(cs)
+
 class TestFillFuncArgs:
     def test_funcarg_lookupfails(self, testdir):
         testdir.makeconftest("""
@@ -314,7 +320,6 @@ class TestRequestCachedSetup:
             "*3 passed*"
         ])
 
-
 class TestMetafunc:
     def test_no_funcargs(self, testdir):
         def function(): pass