fix tests

Author: chaoming0625

brainpy/state/_base_test.py

@@ -148,7 +148,7 @@ def test_neuron_soft_vs_hard_reset(self):
     def test_neuron_module_attribute(self):
         """Test __module__ attribute is correctly set."""
         neuron = Neuron(in_size=self.in_size)
-        self.assertEqual(neuron.__module__, 'brainpy')
+        self.assertEqual(neuron.__module__, 'brainpy.state')
 
 
 class TestSynapseBaseClass(unittest.TestCase):
@@ -247,7 +247,7 @@ def update(self, x=None):
     def test_synapse_module_attribute(self):
         """Test __module__ attribute is correctly set."""
         synapse = Synapse(in_size=self.in_size)
-        self.assertEqual(synapse.__module__, 'brainpy')
+        self.assertEqual(synapse.__module__, 'brainpy.state')
 
     def test_synapse_varshape_attribute(self):
         """Test varshape attribute is correctly set."""