Generalize Pi sandbox launcher

scripts/test_pi_sbx_launcher.py

@@ -0,0 +1,72 @@
+from __future__ import annotations
+
+import os
+import subprocess
+import tempfile
+import unittest
+from pathlib import Path
+
+
+LAUNCHER = Path(__file__).with_name("pi-sbx.fish")
+
+
+class PiSbxLauncherTests(unittest.TestCase):
+    def run_launcher_with_resolver(self, output: str) -> subprocess.CompletedProcess[str]:
+        with tempfile.TemporaryDirectory() as directory:
+            resolver = Path(directory) / "resolver"
+            resolver.write_text(f"#!/bin/sh\nprintf '%s' '{output}'\n", encoding="utf-8")
+            resolver.chmod(0o755)
+            environment = os.environ.copy()
+            environment["PI_SBX_PROFILE_COMMAND"] = str(resolver)
+            return subprocess.run(
+                ["/usr/bin/fish", str(LAUNCHER)],
+                env=environment,
+                check=False,
+                capture_output=True,
+                text=True,
+            )
+
+    def test_rejects_incomplete_launcher_configuration(self) -> None:
+        result = self.run_launcher_with_resolver("pi-local\n/usr/bin/node\n")
+
+        self.assertEqual(result.returncode, 1)
+        self.assertIn("could not resolve a valid configuration", result.stderr)
+
+    def test_rejects_unavailable_profile(self) -> None:
+        result = self.run_launcher_with_resolver(
+            "profile-that-does-not-exist\n/usr/bin/node\n/home/jb/.bun/bin/pi\n/home/jb/.pi/agent\n"
+        )
+
+        self.assertEqual(result.returncode, 1)
+        self.assertIn("resolved nono profile is unavailable", result.stderr)
+
+    def test_uses_nono_from_path(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            temporary = Path(directory)
+            resolver = temporary / "resolver"
+            resolver.write_text(
+                "#!/bin/sh\nprintf '%b' 'pi-local\\n/missing/node\\n/missing/pi\\n/missing/agent\\n'\n",
+                encoding="utf-8",
+            )
+            resolver.chmod(0o755)
+            nono = temporary / "nono"
+            nono.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+            nono.chmod(0o755)
+            environment = os.environ.copy()
+            environment["PI_SBX_PROFILE_COMMAND"] = str(resolver)
+            environment["PATH"] = f"{temporary}:{environment['PATH']}"
+
+            result = subprocess.run(
+                ["/usr/bin/fish", str(LAUNCHER)],
+                env=environment,
+                check=False,
+                capture_output=True,
+                text=True,
+            )
+
+            self.assertEqual(result.returncode, 1)
+            self.assertIn("Node runtime is unavailable", result.stderr)
+
+
+if __name__ == "__main__":
+    unittest.main()