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test_base.py
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test_base.py
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from dataclasses import dataclass
from operator import eq
from operator import ne
from typing import Callable
import pytest
from immutables import Map
from injected import depends
from injected import resolver
from injected import seed_context
from injected._base import Request
from injected._errors import IllegalAsyncDependency
class TestRequest:
@pytest.mark.parametrize("operator", (eq, ne))
def test_raises_not_implemented_error_when_compared(self, operator: Callable):
request = Request(provider=lambda: None, args=(), kwargs=Map())
with pytest.raises(NotImplementedError):
operator(request, request)
with pytest.raises(NotImplementedError):
operator(request, "other")
with pytest.raises(NotImplementedError):
operator("other", request)
def test_raises_not_implemented_error_when_cast_to_str(self):
request = Request(provider=lambda: None, args=(), kwargs=Map())
with pytest.raises(NotImplementedError):
str(request)
class TestInjected:
def test_can_resolve_simple_dependency(self):
value = 123
def provider() -> int:
return value
@resolver
def dependent(arg: int = depends(provider)) -> int:
return arg
assert dependent() == value
def test_can_resolve_nested_dependency(self):
value = 123
def a() -> int:
return value
def b(provided: int = depends(a)) -> int:
return provided
@resolver
def c(provided: int = depends(b)) -> int:
return provided
assert c() == value
def test_can_inject_seed_context(self):
@dataclass
class Request:
payload: dict[str, str]
def get_request() -> Request:
...
@resolver
def view(request: Request = depends(get_request)) -> str:
return f"Hello {request.payload['username']}"
context = {get_request: Request(payload={"username": "Squanchy"})}
seeded = seed_context(view, context)
assert seeded() == "Hello Squanchy"
def test_passes_provider_arguments(self):
def a(value: int) -> int:
return value
def b(provided: int = depends(a, value=123)) -> int:
return provided
@resolver
def c(
nested: int = depends(b),
plain: int = depends(a, 321),
) -> tuple[int, int]:
return nested, plain
assert c() == (123, 321)
def test_reuses_resolved_value(self):
count = 0
def counter() -> int:
nonlocal count
count += 1
return count
def intermediate(value: int = depends(counter)) -> int:
return value
@resolver
def dependent(
plain: int = depends(counter),
nested: int = depends(intermediate),
) -> tuple[int, int]:
return plain, nested
assert (1, 1) == dependent()
assert 1 == count
def test_reevaluates_resolved_value_with_differing_args(self):
count = 0
def counter(arg: object) -> int:
nonlocal count
count += 1
return count
def intermediate(value: int = depends(counter, arg=1)) -> int:
return value
@resolver
def dependent(
plain: int = depends(counter, arg=2),
nested: int = depends(intermediate),
) -> tuple[int, int]:
return plain, nested
assert (1, 2) == dependent()
assert 2 == count
# TODO
@pytest.mark.xfail
def test_skips_evaluation_when_dependency_passed_as_argument(self):
count = 0
def counter() -> int:
nonlocal count
count += 1
return count
@resolver
def dependent(value: int = depends(counter)) -> int:
return value
assert dependent(17) == 17
assert count == 0
def test_raises_illegal_async_dependency_for_coroutine_dependency(self):
async def provider() -> int:
return 0
with pytest.raises(IllegalAsyncDependency):
@resolver
def dependent(value: int = depends(provider)) -> int:
return value
class TestAsyncInjected:
async def test_can_resolve_simple_dependency(self):
value = 123
async def provider() -> int:
return value
@resolver
async def dependent(arg: int = depends(provider)) -> int:
return arg
assert value == await dependent()
async def test_can_resolve_simple_sync_dependency(self):
value = 123
def provider() -> int:
return value
@resolver
async def dependent(arg: int = depends(provider)) -> int:
return arg
assert value == await dependent()
async def test_can_resolve_nested_dependency(self):
value = 123
async def a() -> int:
return value
async def b(provided: int = depends(a)) -> int:
return provided
@resolver
async def c(provided: int = depends(b)) -> int:
return provided
assert value == await c()
async def test_can_resolve_nested_sync_dependency(self):
value = 123
def a() -> int:
return value
async def b(provided: int = depends(a)) -> int:
return provided
@resolver
async def c(provided: int = depends(b)) -> int:
return provided
assert value == await c()
async def test_can_inject_seed_context(self):
@dataclass
class Request:
payload: dict[str, str]
def get_request() -> Request:
...
async def view(request: Request = depends(get_request)) -> str:
return f"Hello {request.payload['username']}"
context = {get_request: Request(payload={"username": "Squanchy"})}
seeded = seed_context(resolver(view), context)
assert "Hello Squanchy" == await seeded()
async def test_can_resolve_sync_dependency_with_nested_async_dependency(self):
value = 123
async def a() -> int:
return value
def b(provided: int = depends(a)) -> int:
return provided
@resolver
async def c(provided: int = depends(b)) -> int:
return provided
assert value == await c()
async def test_passes_provider_arguments(self):
async def a(value: int) -> int:
return value
async def b(provided: int = depends(a, value=123)) -> int:
return provided
@resolver
async def c(
nested: int = depends(b),
plain: int = depends(a, 321),
) -> tuple[int, int]:
return nested, plain
assert await c() == (123, 321)
async def test_reuses_resolved_value(self):
count = 0
async def counter() -> int:
nonlocal count
count += 1
return count
async def intermediate(value: int = depends(counter)) -> int:
return value
@resolver
async def dependent(
plain: int = depends(counter),
nested: int = depends(intermediate),
) -> tuple[int, int]:
return plain, nested
assert (1, 1) == await dependent()
assert 1 == count
async def test_reevaluates_resolved_value_with_differing_args(self):
count = 0
async def counter(arg: object) -> int:
nonlocal count
count += 1
return count
async def intermediate(value: int = depends(counter, arg=1)) -> int:
return value
@resolver
async def dependent(
plain: int = depends(counter, arg=2),
nested: int = depends(intermediate),
) -> tuple[int, int]:
return plain, nested
assert (1, 2) == await dependent()
assert 2 == count