fix cached_setup to deal properly for test_functions

with multiple args.  closes #50

--HG--
branch : trunk

doc/changelog.txt

@@ -1,6 +1,9 @@
 Changes between 1.0.x and 'trunk'
 =====================================
 
+* fix issue50 - cached_setup now caches more to expectations 
+  for test functions with multiple arguments. 
+
 * merge Jarko's fixes, issue #45 and #46
 
 * add the ability to specify a path for py.lookup to search in

doc/test/funcargs.txt

@@ -388,9 +388,9 @@ managing fixtures across test modules and test runs
     def cached_setup(setup, teardown=None, scope="module", extrakey=None):
         """ cache and return result of calling setup().  
 
-        The scope and the ``extrakey`` determine the cache key. 
+        The requested argument name, the scope and the ``extrakey`` 
-        The scope also determines when teardown(result) 
+        determine the cache key.  The scope also determines when 
-        will be called.  valid scopes are: 
+        teardown(result) will be called.  valid scopes are: 
         scope == 'function': when the single test function run finishes. 
         scope == 'module': when tests in a different module are run
         scope == 'session': when tests of the session have run. 

py/test/funcargs.py

@@ -96,6 +96,7 @@ class FuncargRequest:
             self._plugins.append(self.instance)
         self._funcargs  = self._pyfuncitem.funcargs.copy()
         self._provider = {}
+        self._currentarg = None
 
     def _fillfuncargs(self):
         argnames = getfuncargnames(self.function)
@@ -109,16 +110,16 @@ class FuncargRequest:
     def cached_setup(self, setup, teardown=None, scope="module", extrakey=None):
         """ cache and return result of calling setup().  
 
-        The scope and the ``extrakey`` determine the cache key. 
+        The requested argument name, the scope and the ``extrakey`` 
-        The scope also determines when teardown(result) 
+        determine the cache key.  The scope also determines when 
-        will be called.  valid scopes are: 
+        teardown(result) will be called.  valid scopes are: 
         scope == 'function': when the single test function run finishes. 
         scope == 'module': when tests in a different module are run
         scope == 'session': when tests of the session have run. 
         """
         if not hasattr(self.config, '_setupcache'):
             self.config._setupcache = {} # XXX weakref? 
-        cachekey = (self._getscopeitem(scope), extrakey)
+        cachekey = (self._currentarg, self._getscopeitem(scope), extrakey)
         cache = self.config._setupcache
         try:
             val = cache[cachekey]
@@ -146,7 +147,12 @@ class FuncargRequest:
         if not self._provider[argname]:
             self._raiselookupfailed(argname)
         funcargprovider = self._provider[argname].pop()
-        self._funcargs[argname] = res = funcargprovider(request=self)
+        oldarg = self._currentarg
+        self._currentarg = argname 
+        try:
+            self._funcargs[argname] = res = funcargprovider(request=self)
+        finally:
+            self._currentarg = oldarg
         return res
 
     def _getscopeitem(self, scope):

testing/pytest/test_funcargs.py

@@ -258,6 +258,35 @@ class TestRequestCachedSetup:
         req1.config._setupstate._callfinalizers(item1)
         assert l == ["setup", "teardown", "setup", "teardown"]
 
+    def test_request_cached_setup_two_args(self, testdir):
+        testdir.makepyfile("""
+            def pytest_funcarg__arg1(request):
+                return request.cached_setup(lambda: 42)
+            def pytest_funcarg__arg2(request):
+                return request.cached_setup(lambda: 17)
+            def test_two_different_setups(arg1, arg2):
+                assert arg1 != arg2 
+        """)
+        result = testdir.runpytest("-v")
+        result.stdout.fnmatch_lines([
+            "*1 passed*"
+        ])
+
+    def test_request_cached_setup_getfuncargvalue(self, testdir):
+        testdir.makepyfile("""
+            def pytest_funcarg__arg1(request):
+                arg1 = request.getfuncargvalue("arg2")
+                return request.cached_setup(lambda: arg1 + 1)
+            def pytest_funcarg__arg2(request):
+                return request.cached_setup(lambda: 10)
+            def test_two_funcarg(arg1):
+                assert arg1 == 11
+        """)
+        result = testdir.runpytest("-v")
+        result.stdout.fnmatch_lines([
+            "*1 passed*"
+        ])
+
     def test_request_cached_setup_functional(self, testdir):
         testdir.makepyfile(test_0="""
             l = []