i think that this works now

tests/test_server.py

@@ -0,0 +1,141 @@
+import pytest
+from unittest.mock import AsyncMock, patch
+from aiohttp import web
+from aiohttp.test_utils import AioHTTPTestCase
+
+from server import create_app
+
+
+class TestServer(AioHTTPTestCase):
+    async def get_application(self):
+        return create_app()
+
+    async def test_health(self):
+        resp = await self.client.get("/health")
+        assert resp.status == 200
+        text = await resp.text()
+        assert text == "ok"
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.wait_for_token", new_callable=AsyncMock)
+    async def test_token_empty_pool_no_accounts(self, mock_wait, mock_first):
+        mock_first.return_value = None
+        mock_wait.return_value = None
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "public"
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.wait_for_token", new_callable=AsyncMock)
+    async def test_token_empty_pool_waits_then_gets(self, mock_wait, mock_first):
+        mock_first.side_effect = [None, "new_token"]
+        mock_wait.return_value = "new_token"
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "new_token"
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.pop_token", new_callable=AsyncMock)
+    @patch("server.trigger_refill", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    @patch("server.get_balance", new_callable=AsyncMock)
+    async def test_token_valid(
+        self, mock_balance, mock_size, mock_refill, mock_pop, mock_first
+    ):
+        mock_first.return_value = "test_token_12345"
+        mock_balance.return_value = {"balance": 10.0}
+        mock_size.return_value = 3
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "test_token_12345"
+        mock_pop.assert_not_called()
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.pop_token", new_callable=AsyncMock)
+    @patch("server.trigger_refill", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    @patch("server.get_balance", new_callable=AsyncMock)
+    async def test_token_zero_balance_removed(
+        self, mock_balance, mock_size, mock_refill, mock_pop, mock_first
+    ):
+        mock_first.side_effect = ["bad_token", "good_token"]
+        mock_balance.side_effect = [{"balance": 0}, {"balance": 15.0}]
+        mock_size.return_value = 2
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "good_token"
+        assert mock_pop.call_count == 1
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.pop_token", new_callable=AsyncMock)
+    @patch("server.trigger_refill", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    @patch("server.get_balance", new_callable=AsyncMock)
+    async def test_token_balance_fetch_fails(
+        self, mock_balance, mock_size, mock_refill, mock_pop, mock_first
+    ):
+        mock_first.side_effect = ["bad_token", "good_token"]
+        mock_balance.side_effect = [None, {"balance": 10.0}]
+        mock_size.return_value = 2
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "good_token"
+        mock_pop.assert_called()
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.pop_token", new_callable=AsyncMock)
+    @patch("server.trigger_refill", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    @patch("server.get_balance", new_callable=AsyncMock)
+    async def test_token_balance_with_remaining_key(
+        self, mock_balance, mock_size, mock_refill, mock_pop, mock_first
+    ):
+        mock_first.return_value = "test_token"
+        mock_balance.return_value = {"remaining": 20.0}
+        mock_size.return_value = 1
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "test_token"
+
+    @patch("server.has_accounts", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    async def test_status(self, mock_size, mock_has):
+        mock_size.return_value = 5
+        mock_has.return_value = True
+
+        resp = await self.client.get("/status")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["pool_size"] == 5
+        assert data["has_accounts"] is True
+
+    @patch("server.get_first_token", new_callable=AsyncMock)
+    @patch("server.pop_token", new_callable=AsyncMock)
+    @patch("server.trigger_refill", new_callable=AsyncMock)
+    @patch("server.wait_for_token", new_callable=AsyncMock)
+    @patch("server.pool_size", new_callable=AsyncMock)
+    @patch("server.get_balance", new_callable=AsyncMock)
+    async def test_all_tokens_exhausted_then_public(
+        self, mock_balance, mock_size, mock_wait, mock_refill, mock_pop, mock_first
+    ):
+        mock_first.side_effect = ["token1", "token2", None]
+        mock_balance.side_effect = [{"balance": 0}, {"balance": -5}]
+        mock_wait.return_value = None
+        mock_size.return_value = 0
+
+        resp = await self.client.get("/token")
+        assert resp.status == 200
+        data = await resp.json()
+        assert data["token"] == "public"