Document test commands and remove hard-coded runtime path

tests/README.md

@@ -0,0 +1,102 @@
+# Tests
+
+This directory contains two test paths:
+
+- unit tests for exporter behavior
+- runtime validation for committed workflow fixtures
+
+## Prerequisites
+
+- Run commands from the repo root.
+- Use `uv` for all project commands.
+- Install the repo environment first:
+
+```bash
+uv sync
+```
+
+- Runtime validation also needs a working ComfyUI checkout.
+  Set `COMFYUI_PATH` to that checkout, or run the tests from a location where a parent directory contains `ComfyUI`.
+
+## Unit Tests
+
+Run the current unit test module:
+
+```bash
+uv run python -m unittest tests.test_upscale_model_loader_export
+```
+
+Run all `unittest`-discoverable tests under `tests`:
+
+```bash
+uv run python -m unittest discover -s tests
+```
+
+## Runtime Tests
+
+The runtime harness lives at `tests/runtime/run_runtime_validation.py`.
+
+### Fast Tier
+
+Fast tier validates export behavior against committed fixtures without requiring a full ComfyUI runtime for every fixture.
+
+Run all fast-tier compatible fixtures:
+
+```bash
+uv run python tests/runtime/run_runtime_validation.py --tier fast --fixture all
+```
+
+Run one fixture:
+
+```bash
+uv run python tests/runtime/run_runtime_validation.py --tier fast --fixture unsafe-kwargs
+```
+
+### Runtime Tier
+
+Runtime tier exports inside a real ComfyUI checkout and executes generated Python for runtime-capable fixtures.
+
+Run all runtime-capable fixtures:
+
+```bash
+uv run python tests/runtime/run_runtime_validation.py --tier runtime --fixture all
+```
+
+Run one runtime-capable fixture:
+
+```bash
+uv run python tests/runtime/run_runtime_validation.py --tier runtime --fixture text-to-image
+```
+
+Print download commands for missing models instead of failing immediately:
+
+```bash
+uv run python tests/runtime/run_runtime_validation.py --tier runtime --fixture all --print-download-plan
+```
+
+## Runtime Fixture Names
+
+Current committed fixtures:
+
+- `upscale-model-loader`
+- `text-to-image`
+- `unsafe-kwargs`
+- `subgraph-identifiers`
+
+Notes:
+
+- `--tier runtime` only runs fixtures marked runtime-capable.
+- `--tier fast` only runs fixtures with local test mappings.
+
+## Troubleshooting
+
+- `No module named ...`:
+  run `uv sync` in this repo, and for runtime-tier failures also make sure the target ComfyUI checkout has its own dependencies installed.
+- `Could not find a valid ComfyUI checkout for runtime validation.`:
+  set `COMFYUI_PATH` to your ComfyUI checkout, or run the tests from a directory layout where a parent folder contains `ComfyUI`.
+- `Missing models for ...`:
+  rerun with `--print-download-plan` to print the expected `curl` commands and target model directories.
+- `No selected fixtures are runtime-capable for this tier.`:
+  choose a runtime-capable fixture such as `text-to-image` or `upscale-model-loader`.
+- Generated script execution fails because files or models are missing:
+  confirm the required models exist under the target ComfyUI checkout and that any staged inputs can be copied into its `input/` directory.

tests/runtime/run_runtime_validation.py

@@ -13,11 +13,11 @@ from io import StringIO
 from pathlib import Path
 from typing import Callable
 
+from comfyui_to_python_utils import get_comfyui_path
 
 ROOT = Path(__file__).resolve().parents[2]
 FIXTURE_DIR = ROOT / "tests" / "fixtures" / "runtime"
 GENERATED_DIR = ROOT / "tests" / "runtime" / "generated"
-BASELINE_COMFYUI_PATH = Path("/home/peyton/code/ComfyUI")
 COMFYUI_OUTPUT_DIRNAME = "output"
 COMFYUI_INPUT_DIRNAME = "input"
 
@@ -286,14 +286,16 @@ def load_fixture_names(selection: str) -> list[str]:
 
 def ensure_runtime_path(tier: str) -> str:
     if tier == "runtime":
-        runtime_path = BASELINE_COMFYUI_PATH
+        runtime_path = get_comfyui_path()
     else:
         return os.environ.get("COMFYUI_PATH", "")
 
-    if not runtime_path.is_dir():
+    if not runtime_path or not Path(runtime_path).is_dir():
         raise ValidationFailure(
             "environment/setup failure",
-            f"Expected ComfyUI checkout at {runtime_path}, but it was not found.",
+            "Could not find a valid ComfyUI checkout for runtime validation. "
+            "Set COMFYUI_PATH or run the tests from a location where a "
+            "parent directory contains ComfyUI.",
         )
 
     return str(runtime_path)