add tests for PythClient and PythAccount (#11)

* replace SolanaAccount initialization in each tests with solana_account fixture

* add test coverage for PythClient

* update PythAccount test coverage

* add test to get ratelimit and create watch session

* address Jeff's feedback for test_pyth_account.py

* Update tests/test_pyth_account.py

Co-authored-by: Jeff Schroeder <jeffschroeder@computer.org>

* Update tests/test_pyth_client.py

Co-authored-by: Jeff Schroeder <jeffschroeder@computer.org>

* Update tests/test_pyth_client.py

Co-authored-by: Jeff Schroeder <jeffschroeder@computer.org>

* Update tests/test_pyth_client.py

Co-authored-by: Jeff Schroeder <jeffschroeder@computer.org>

* address Jeff's feedback for test_pyth_client.py

* change constants to fixtures returning pubkey

* add return value for get_account_info_resp

* add return value types

Co-authored-by: Jeff Schroeder <jeffschroeder@computer.org>

Author: cctdaniel

tests/test_pyth_account.py

@@ -0,0 +1,120 @@
+import pytest
+
+from _pytest.logging import LogCaptureFixture
+
+from pythclient.solana import SolanaClient, SolanaPublicKey
+from pythclient.pythaccounts import PythAccount, PythAccountType, PythProductAccount
+
+
+@pytest.fixture
+def solana_pubkey() -> SolanaPublicKey:
+    return SolanaPublicKey("AHtgzX45WTKfkPG53L6WYhGEXwQkN1BVknET3sVsLL8J")
+
+
+@pytest.fixture
+def product_account_pubkey() -> SolanaPublicKey:
+    return SolanaPublicKey("89GseEmvNkzAMMEXcW9oTYzqRPXTsJ3BmNerXmgA1osV")
+
+
+@pytest.fixture
+def price_account_pubkey() -> SolanaPublicKey:
+    return SolanaPublicKey("4EQrNZYk5KR1RnjyzbaaRbHsv8VqZWzSUtvx58wLsZbj")
+
+
+@pytest.fixture
+def product_account_b64() -> str:
+    return ('1MOyoQIAAAACAAAAlwAAADAClHlZh5cpDjY4oXEsKb3iNn0OynlPd4sltaRy8ZLeBnN5bWJvbAdCQ0gv'
+            'VVNECmFzc2V0X3R5cGUGQ3J5cHRvDnF1b3RlX2N1cnJlbmN5A1VTRAtkZXNjcmlwdGlvbgdCQ0gvVVNE'
+            'DmdlbmVyaWNfc3ltYm9sBkJDSFVTRARiYXNlA0JDSA==')
+
+
+@pytest.fixture
+def pyth_account(solana_pubkey: SolanaPublicKey, solana_client: SolanaClient) -> PythAccount:
+    return PythAccount(
+        key=solana_pubkey,
+        solana=solana_client,
+    )
+
+
+@ pytest.fixture
+def product_account(solana_client: SolanaClient,
+                    product_account_pubkey: SolanaPublicKey,
+                    price_account_pubkey: SolanaPublicKey) -> PythProductAccount:
+    product_account = PythProductAccount(
+        key=product_account_pubkey,
+        solana=solana_client,
+    )
+    product_account.slot = 96866599
+    product_account.attrs = {
+        'asset_type': 'Crypto',
+        'symbol': 'BCH/USD',
+        'quote_currency': 'USD',
+        'description': 'BCH/USD',
+        'generic_symbol': 'BCHUSD',
+        'base': 'BCH'
+    }
+    product_account.first_price_account_key = price_account_pubkey
+    return product_account
+
+
+def test_product_account_update_with_rpc_response_with_data(
+    solana_client: SolanaClient,
+    product_account: PythProductAccount,
+    product_account_b64: str
+) -> None:
+    actual = PythProductAccount(
+        key=product_account.key,
+        solana=solana_client,
+    )
+    assert actual.attrs == {}
+
+    slot = 96866600
+    value = {
+        'lamports': 1000000000,
+        'data': [
+            product_account_b64,
+            'base64'
+        ]
+    }
+
+    actual.update_with_rpc_response(slot=slot, value=value)
+    assert actual.slot == slot
+    assert actual.lamports == value['lamports']
+    assert actual.attrs['symbol'] == product_account.attrs['symbol']
+    assert actual.attrs['description'] == product_account.attrs['description']
+    assert actual.attrs['generic_symbol'] == product_account.attrs['generic_symbol']
+    assert actual.attrs['base'] == product_account.attrs['base']
+
+
+def test_pyth_account_update_with_rpc_response_wrong_type(
+    pyth_account: PythAccount,
+    caplog: LogCaptureFixture,
+    product_account_b64: str
+) -> None:
+    slot = 96866600
+    value = {
+        'lamports': 1000000000,
+        'data': [
+            product_account_b64,
+            'base64'
+        ]
+    }
+
+    exc_message = f"wrong Pyth account type {PythAccountType.PRODUCT} for {type(pyth_account)}"
+    with pytest.raises(ValueError, match=exc_message):
+        pyth_account.update_with_rpc_response(slot=slot, value=value)
+
+
+def test_pyth_account_update_with_rpc_response_no_data(
+    pyth_account: PythAccount,
+    caplog: LogCaptureFixture
+) -> None:
+    slot = 106498726
+    value = {
+        "lamports": 1000000000
+    }
+
+    exc_message = f'invalid account data response from Solana for key {pyth_account.key}: {value}'
+    with pytest.raises(ValueError, match=exc_message):
+        pyth_account.update_with_rpc_response(slot=slot, value=value)
+    assert exc_message in caplog.text