fix test_timer test for new-style-exp

tests/chainer_tests/function_hooks_tests/test_timer.py

@@ -20,6 +20,7 @@ def check_history(self, t, function_type, return_type):
 
 
 class SimpleLink(chainer.Link):
+
     def __init__(self):
         super(SimpleLink, self).__init__()
         with self.init_scope():
@@ -88,7 +89,7 @@ def setUp(self):
         self.gy = numpy.random.uniform(-0.1, 0.1, (3, 5)).astype(numpy.float32)
 
     def check_forward(self, x):
-        self.f(chainer.Variable(x))
+        self.f.apply((chainer.Variable(x),))
         self.assertEqual(1, len(self.h.call_history))
         check_history(self, self.h.call_history[0], functions.Exp, float)
 
@@ -101,7 +102,7 @@ def test_forward_gpu(self):
 
     def check_backward(self, x, gy):
         x = chainer.Variable(x)
-        y = self.f(x)
+        y = self.f.apply((x,))[0]
         y.grad = gy
         y.backward()
         self.assertEqual(2, len(self.h.call_history))
@@ -163,15 +164,15 @@ def setUp(self):
 
     def test_summary(self):
         x = self.x
-        self.f(chainer.Variable(x))
-        self.f(chainer.Variable(x))
+        self.f.apply((chainer.Variable(x),))
+        self.f.apply((chainer.Variable(x),))
         self.assertEqual(2, len(self.h.call_history))
         self.assertEqual(1, len(self.h.summary()))
 
     def test_print_report(self):
         x = self.x
-        self.f(chainer.Variable(x))
-        self.f(chainer.Variable(x))
+        self.f.apply((chainer.Variable(x),))
+        self.f.apply((chainer.Variable(x),))
         io = six.StringIO()
         self.h.print_report(file=io)
         expect = r'''\AFunctionName  ElapsedTime  Occurrence