013 add price multiplier

tests/config/fixtures/config.default.yaml

@@ -6,6 +6,7 @@ service:
 
 business_logic:
   weight_round_scale: 2
+  provider_price_multiplier: 1.0
 
 repository:
   redis_dsn: "redis://localhost:6379/0"

tests/config/fixtures/config.invalid_price_multiplier.yaml

@@ -0,0 +1,24 @@
+controller:
+  api_prefix: "/api/v1"
+  request_id_header: "X-Request-ID"
+
+service:
+  provider_timeout_seconds: 10.0
+  max_parallel_providers: 8
+
+business_logic:
+  weight_round_scale: 2
+  provider_price_multiplier: 0
+
+repository:
+  redis_dsn: "redis://localhost:6379/0"
+  price_cache_ttl_seconds: 900
+
+adapter:
+  cdek_base_url: "https://api.cdek.ru/v2"
+  cdek_client_id: "test-client-id"
+  cdek_client_secret: "test-client-secret"
+  cdek_retry_attempts: 2
+  cdek_retry_backoff_seconds: 0.2
+  cdek_timeout_seconds: 10.0
+  cdek_cache_ttl_seconds: 900

tests/config/fixtures/config.missing_adapter.yaml

@@ -6,6 +6,7 @@ service:
 
 business_logic:
   weight_round_scale: 2
+  provider_price_multiplier: 1.0
 
 repository:
   redis_dsn: "redis://localhost:6379/0"

tests/config/fixtures/config.missing_price_multiplier.yaml

@@ -0,0 +1,23 @@
+controller:
+  api_prefix: "/api/v1"
+  request_id_header: "X-Request-ID"
+
+service:
+  provider_timeout_seconds: 10.0
+  max_parallel_providers: 8
+
+business_logic:
+  weight_round_scale: 2
+
+repository:
+  redis_dsn: "redis://localhost:6379/0"
+  price_cache_ttl_seconds: 900
+
+adapter:
+  cdek_base_url: "https://api.cdek.ru/v2"
+  cdek_client_id: "test-client-id"
+  cdek_client_secret: "test-client-secret"
+  cdek_retry_attempts: 2
+  cdek_retry_backoff_seconds: 0.2
+  cdek_timeout_seconds: 10.0
+  cdek_cache_ttl_seconds: 900

tests/config/fixtures/config.test.override.yaml

@@ -6,6 +6,7 @@ service:
 
 business_logic:
   weight_round_scale: 2
+  provider_price_multiplier: 1.25
 
 repository:
   redis_dsn: "redis://localhost:6379/0"

tests/config/test_config_sections.py

@@ -1,3 +1,4 @@
+from decimal import Decimal
 from pathlib import Path
 
 import pytest
@@ -17,6 +18,12 @@ DEFAULT_CONFIG_FILE_FIXTURE = (
 TEST_OVERRIDE_CONFIG_FILE_FIXTURE = (
     PROJECT_ROOT / "tests" / "config" / "fixtures" / "config.test.override.yaml"
 )
+INVALID_PRICE_MULTIPLIER_CONFIG_FILE = (
+    PROJECT_ROOT / "tests" / "config" / "fixtures" / "config.invalid_price_multiplier.yaml"
+)
+MISSING_PRICE_MULTIPLIER_CONFIG_FILE = (
+    PROJECT_ROOT / "tests" / "config" / "fixtures" / "config.missing_price_multiplier.yaml"
+)
 
 
 def _use_runtime_config_files(
@@ -47,6 +54,7 @@ def test_configuration_sections_are_loaded_from_yaml_file(
     assert settings.service.provider_timeout_seconds == 10.0
     assert settings.service.max_parallel_providers == 8
     assert settings.business_logic.weight_round_scale == 2
+    assert settings.business_logic.provider_price_multiplier == Decimal("1.0")
     assert settings.repository.redis_dsn == "redis://localhost:6379/0"
     assert settings.repository.price_cache_ttl_seconds == 900
     assert settings.adapter.cdek_base_url == "https://api.cdek.ru/v2"
@@ -82,6 +90,7 @@ def test_get_settings_returns_cached_instance(monkeypatch: pytest.MonkeyPatch) -
 
     assert first is second
     assert first.service.provider_timeout_seconds == 10.0
+    assert first.business_logic.provider_price_multiplier == Decimal("1.0")
     get_settings.cache_clear()
 
 
@@ -98,5 +107,38 @@ def test_get_settings_uses_config_test_yaml_in_pytest_environment(
 
     assert settings.service.provider_timeout_seconds == 17.0
     assert settings.controller.api_prefix == "/from-config-test-yaml"
+    assert settings.business_logic.provider_price_multiplier == Decimal("1.25")
     assert settings.adapter.cdek_client_id == "test-id"
     get_settings.cache_clear()
+
+
+def test_get_settings_fails_when_provider_price_multiplier_is_invalid(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    _use_runtime_config_files(
+        monkeypatch,
+        test_config_file=INVALID_PRICE_MULTIPLIER_CONFIG_FILE,
+    )
+
+    with pytest.raises(ValidationError) as error:
+        get_settings()
+
+    locations = {tuple(item["loc"]) for item in error.value.errors()}
+    assert ("business_logic", "provider_price_multiplier") in locations
+    get_settings.cache_clear()
+
+
+def test_get_settings_fails_when_provider_price_multiplier_is_missing(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    _use_runtime_config_files(
+        monkeypatch,
+        test_config_file=MISSING_PRICE_MULTIPLIER_CONFIG_FILE,
+    )
+
+    with pytest.raises(ValidationError) as error:
+        get_settings()
+
+    locations = {tuple(item["loc"]) for item in error.value.errors()}
+    assert ("business_logic", "provider_price_multiplier") in locations
+    get_settings.cache_clear()