Create test_module.py and add tests for attach_methods()

Author: fselmo

tests/core/module-class/test_module.py

@@ -27,7 +27,7 @@ def test_attach_methods_to_module(web3_with_external_modules):
 
     w3.module1.attach_methods({
         # set `property1` on `module1` with `eth_chainId` RPC endpoint
-        'property1': Method('eth_chainId', is_property=True),
+        'property1': Method('eth_chainId', set_as_property=True),
         # set `method1` on `module1` with `eth_getBalance` RPC endpoint
         'method1': Method('eth_getBalance'),
     })
@@ -41,7 +41,7 @@ def test_attach_methods_to_module(web3_with_external_modules):
 
     w3.module2.submodule1.attach_methods({
         # set `method2` on `module2.submodule1` with `eth_blockNumber` RPC endpoint
-        'method2': Method('eth_blockNumber', is_property=True)
+        'method2': Method('eth_blockNumber', set_as_property=True)
     })
 
     assert w3.eth.block_number == 0