Add tests for Registrar and the utility functions

tests/blockchain/eth/test_interfaces.py

@@ -0,0 +1,83 @@
+import json
+import pytest
+
+from nkms.blockchain.eth.interfaces import (
+    Registrar, _write_registrar_file, _read_registrar_file
+)
+
+
+def test_registrar_read_write(tempfile_path):
+    # Test that the file is initally empty and returns an empty dict.
+    should_be_empty = _read_registrar_data(tempfile_path)
+    assert should_be_empty == {}
+
+    # Test that data can be written and read
+    test_data = {'test': 'foobar'}
+    _write_registrar_file(test_data, tempfile_path)
+    out_data = _read_registrar_file(tempfile_path)
+    assert test_data == out_data
+
+    # Test overwrite
+    new_test_data = {'new_test': 'foobar'}
+    _write_registrar_file(new_test_data, tempfile_path)
+    out_data = _read_registrar_file(tempfile_path)
+    assert out_data != test_data and new_test_data == out_data
+
+
+def test_registrar_object(tempfile_path):
+    # Tests everything is as it should be when initially created
+    test_registrar = Registrar(registrar_filepath=tempfile_path)
+    assert test_registrar._chain_name == 'tester'
+
+    should_be_empty = _read_registrar_file(tempfile_path)
+    assert should_be_empty == {}
+
+    should_also_be_empty = Registrar.get_chains(tempfile_path)
+    assert should_also_be_empty = {}
+
+    # Test contract enrollment and get_chain_data
+    test_name = 'test_contract'
+    test_addr = '0xDEADBEEF'
+    test_abi = ['fake', 'data']
+    test_registrar.enroll(test_name, test_addr, test_abi)
+
+    chain_data = test_registrar.get_chain_data()
+    assert test_name in chain_data
+    assert chain_data[test_name]['addr'] == test_addr
+    assert chain_data[test_name]['abi'] == test_abi
+
+    # Test get_contract_data via identifier
+    contract_by_name = test_registrar.get_contract_data(test_name)
+    assert contract_by_name['addr'] == test_addr
+    assert contract_by_name['abi'] == test_abi
+
+    contract_by_addr = test_registrar.get_contract_data(test_addr)
+    assert contract_by_addr['addr'] == test_addr
+    assert contract_by_addr['abi'] == test_abi
+
+    assert contract_by_name == contract_by_addr
+
+    # Test enroll with same contract name updates contract data
+    new_test_addr = '0xBEEFDEAD'
+    test_registrar.enroll(test_name, new_test_addr, test_abi)
+
+    test_contract = test_registrar.get_contract_data(test_name)
+    assert test_contract['addr'] == new_test_addr
+    assert test_contract['abi'] == test_abi
+
+    # Test new chain via new registrar object
+    new_chain_name = 'not_tester'
+    new_chain_registrar = Registrar(chain_name=new_chain_name, registrar_filepath=tempfile_path)
+    chains = Registrar.get_chains(tempfile_path)
+    assert new_chain_name not in chains # Not written yet, shouldn't be there
+
+    with pytest.raises(KeyError):
+        new_chain_registrar.get_chain_data()
+
+    new_chain_registrar.enroll(test_name, test_addr, test_abi)
+    updated_chains = Registrar.get_chains(tempfile_path)
+    assert new_chain_name in chains and 'tester' in chains
+
+    # Test NoKnownContract error
+    with pytest.raises(Registrar.NoKnownContract):
+        test_registrar.get_contract_data('This should not exist')