Tests, WebHost: add tests for host_room and minor cleanup (#3619)

* Tests, WebHost: move out setUp and fix typing in api_generate

Also fixes a typo
and changes client to be per-test rather than a ClassVar

* Tests, WebHost: add tests for display_log endpoint

* Tests, WebHost: add tests for host_room endpoint

* Tests, WebHost: enable Flask DEBUG mode for tests

This provides the actual error if a test raised an exception on the server.

* Tests, WebHost: use user_path for logs

This is what custom_server does now.

* Tests, WebHost: avoid triggering security scans

test/webhost/test_api_generate.py

@@ -1,31 +1,16 @@
 import io
-import unittest
 import json
 import yaml
 
+from . import TestBase
 
-class TestDocs(unittest.TestCase):
-    @classmethod
-    def setUpClass(cls) -> None:
-        from WebHostLib import app as raw_app
-        from WebHost import get_app
-        raw_app.config["PONY"] = {
-            "provider": "sqlite",
-            "filename": ":memory:",
-            "create_db": True,
-        }
-        raw_app.config.update({
-            "TESTING": True,
-        })
-        app = get_app()
 
-        cls.client = app.test_client()
-
-    def test_correct_error_empty_request(self):
+class TestAPIGenerate(TestBase):
+    def test_correct_error_empty_request(self) -> None:
         response = self.client.post("/api/generate")
         self.assertIn("No options found. Expected file attachment or json weights.", response.text)
 
-    def test_generation_queued_weights(self):
+    def test_generation_queued_weights(self) -> None:
         options = {
             "Tester1":
                 {
@@ -43,7 +28,7 @@ class TestDocs(unittest.TestCase):
         self.assertTrue(json_data["text"].startswith("Generation of seed "))
         self.assertTrue(json_data["text"].endswith(" started successfully."))
 
-    def test_generation_queued_file(self):
+    def test_generation_queued_file(self) -> None:
         options = {
             "game": "Archipelago",
             "name": "Tester",