InvokeAI/tests/nodes/test_nodes.py

from typing import Any, Callable, Union

from pydantic import Field

from invokeai.app.invocations.baseinvocation import (
    BaseInvocation,
    BaseInvocationOutput,
    InvocationContext,
    invocation,
    invocation_output,
)
from invokeai.app.invocations.image import ImageField


# Define test invocations before importing anything that uses invocations
@invocation_output("test_list_output")
class ListPassThroughInvocationOutput(BaseInvocationOutput):
    collection: list[ImageField] = Field(default_factory=list)


@invocation("test_list")
class ListPassThroughInvocation(BaseInvocation):
    collection: list[ImageField] = Field(default_factory=list)

    def invoke(self, context: InvocationContext) -> ListPassThroughInvocationOutput:
        return ListPassThroughInvocationOutput(collection=self.collection)


@invocation_output("test_prompt_output")
class PromptTestInvocationOutput(BaseInvocationOutput):
    prompt: str = Field(default="")


@invocation("test_prompt")
class PromptTestInvocation(BaseInvocation):
    prompt: str = Field(default="")

    def invoke(self, context: InvocationContext) -> PromptTestInvocationOutput:
        return PromptTestInvocationOutput(prompt=self.prompt)


@invocation("test_error")
class ErrorInvocation(BaseInvocation):
    def invoke(self, context: InvocationContext) -> PromptTestInvocationOutput:
        raise Exception("This invocation is supposed to fail")


@invocation_output("test_image_output")
class ImageTestInvocationOutput(BaseInvocationOutput):
    image: ImageField = Field()


@invocation("test_text_to_image")
class TextToImageTestInvocation(BaseInvocation):
    prompt: str = Field(default="")

    def invoke(self, context: InvocationContext) -> ImageTestInvocationOutput:
        return ImageTestInvocationOutput(image=ImageField(image_name=self.id))


@invocation("test_image_to_image")
class ImageToImageTestInvocation(BaseInvocation):
    prompt: str = Field(default="")
    image: Union[ImageField, None] = Field(default=None)

    def invoke(self, context: InvocationContext) -> ImageTestInvocationOutput:
        return ImageTestInvocationOutput(image=ImageField(image_name=self.id))


@invocation_output("test_prompt_collection_output")
class PromptCollectionTestInvocationOutput(BaseInvocationOutput):
    collection: list[str] = Field(default_factory=list)


@invocation("test_prompt_collection")
class PromptCollectionTestInvocation(BaseInvocation):
    collection: list[str] = Field()

    def invoke(self, context: InvocationContext) -> PromptCollectionTestInvocationOutput:
        return PromptCollectionTestInvocationOutput(collection=self.collection.copy())


# Importing these must happen after test invocations are defined or they won't register
from invokeai.app.services.events import EventServiceBase  # noqa: E402
from invokeai.app.services.graph import Edge, EdgeConnection  # noqa: E402


def create_edge(from_id: str, from_field: str, to_id: str, to_field: str) -> Edge:
    return Edge(
        source=EdgeConnection(node_id=from_id, field=from_field),
        destination=EdgeConnection(node_id=to_id, field=to_field),
    )


class TestEvent:
    event_name: str
    payload: Any

    def __init__(self, event_name: str, payload: Any):
        self.event_name = event_name
        self.payload = payload


class TestEventService(EventServiceBase):
    events: list

    def __init__(self):
        super().__init__()
        self.events = list()

    def dispatch(self, event_name: str, payload: Any) -> None:
        pass


def wait_until(condition: Callable[[], bool], timeout: int = 10, interval: float = 0.1) -> None:
    import time

    start_time = time.time()
    while time.time() - start_time < timeout:
        if condition():
            return
        time.sleep(interval)
    raise TimeoutError("Condition not met")