Cover configs with tests

app/tests/test_configs.py

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+from json import dumps
+from typing import Dict
+
+import pytest
+
+from app.configs import parse
+
+
+class TestParse:
+    def test_parse_should_raise_not_implemented_error_when_unsupported_cast_type_provided(
+        self
+    ):
+        with pytest.raises(NotImplementedError):
+            parse(tuple, "", ",")
+
+    def test_parse_should_return_str_when_str_requested_and_value_is_str(self):
+        assert parse(str, "true", ",") == "true"
+
+    def test_parse_should_return_psql_async_url_when_db_url_and_async_requested_and_sync_url_provided(
+        self
+    ):
+        result = parse(
+            str,
+            "postgresql://user:password@host/db_name",
+            ",",
+            async_=True,
+            db_url=True,
+        )
+
+        assert result == "postgresql+asyncpg://user:password@host/db_name"
+
+    def test_parse_should_return_postgresql_protocol_when_db_url_requested_and_postgres_protocol_provided(
+        self
+    ):
+        result = parse(
+            str,
+            "postgres://user:password@host/db_name",
+            ",",
+            db_url=True,
+        )
+
+        assert result == "postgresql://user:password@host/db_name"
+
+    def test_parse_should_return_bool_true_when_bool_requested_and_value_is_str_true(
+        self
+    ):
+        assert parse(bool, "true", ",") is True
+
+    def test_parse_should_return_bool_true_when_bool_requested_and_value_is_str_false(
+        self
+    ):
+        assert parse(bool, "false", ",") is False
+
+    def test_parse_should_return_list_when_list_requested_and_value_is_str_separated_by_comma(
+        self
+    ):
+        initial_setting = "host1,host2,host3"
+        result = ["host1", "host2", "host3"]
+
+        assert parse(list, initial_setting, ",") == result
+
+    def test_parse_should_return_list_when_list_requested_and_value_is_str_separated_by_pipe(
+        self
+    ):
+        initial_setting = "host1|host2|host3"
+        result = ["host1", "host2", "host3"]
+
+        assert parse(list, initial_setting, "|") == result
+
+    def test_parse_should_raise_runtime_error_when_dict_requested_and_value_is_not_dict(
+        self
+    ):
+        with pytest.raises(RuntimeError):
+            parse(dict, "NOT A DICTIONARY", ",")
+
+    def test_parse_should_return_valid_dict_when_dict_requested_and_value_is_valid_dict(
+        self
+    ):
+        orig_dict = dict(test_key="test_val")
+        dict_: Dict = parse(Dict, dumps(orig_dict), ",")
+
+        assert dict_ == orig_dict