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"""Tests for cross-agent-discover (TDD: tests written before implementation)."""
from __future__ import annotations
import json
import os
import subprocess
import textwrap
from pathlib import Path
import pytest
SCRIPT = Path(__file__).resolve().parent.parent / "cross-agent-comms" / "cross-agent-discover"
def _run(args: list[str], env: dict | None = None) -> subprocess.CompletedProcess:
return subprocess.run([str(SCRIPT), *args], capture_output=True, text=True, env=env)
@pytest.fixture
def fake_home(tmp_path, monkeypatch):
home = tmp_path / "home"
home.mkdir()
monkeypatch.setenv("HOME", str(home))
return home
def _make_project(home: Path, name: str) -> Path:
proj = home / "projects" / name
(proj / ".ai").mkdir(parents=True)
return proj
def _write_peers_toml(home: Path, content: str) -> Path:
cfg = home / ".config" / "cross-agent-comms"
cfg.mkdir(parents=True, exist_ok=True)
peers = cfg / "peers.toml"
peers.write_text(content)
return peers
def test_discover_help(fake_home):
result = _run(["--help"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
assert "discover" in result.stdout.lower() or "enumerate" in result.stdout.lower()
def test_discover_local_only_no_projects(fake_home):
"""Empty home → reports zero local projects, zero peers."""
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
# No crash; mentions local somehow.
assert "local" in result.stdout.lower() or "0 project" in result.stdout.lower()
def test_discover_lists_local_projects(fake_home):
_make_project(fake_home, "homelab")
_make_project(fake_home, "career")
_make_project(fake_home, "claude-templates")
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
assert "homelab" in result.stdout
assert "career" in result.stdout
assert "claude-templates" in result.stdout
def test_discover_excludes_dirs_without_ai_subdir(fake_home):
"""Directories under ~/projects/ that lack .ai/ are NOT projects."""
_make_project(fake_home, "real-project")
(fake_home / "projects" / "not-a-project").mkdir(parents=True)
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
assert "real-project" in result.stdout
assert "not-a-project" not in result.stdout
def test_discover_no_peers_toml_just_local(fake_home):
_make_project(fake_home, "homelab")
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
# No peers section since no toml.
assert "homelab" in result.stdout
def test_discover_lists_peers_from_toml(fake_home):
_write_peers_toml(fake_home, textwrap.dedent("""\
[peers.velox]
host = "velox"
ssh_user = "cjennings"
[peers.bastion]
host = "bastion.local"
ssh_user = "cjennings"
"""))
_make_project(fake_home, "homelab")
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
assert "velox" in result.stdout
assert "bastion" in result.stdout
def test_discover_malformed_peers_toml_errors_clearly(fake_home):
_write_peers_toml(fake_home, "not valid toml at all = = =")
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode != 0
assert "peers.toml" in result.stderr or "TOML" in result.stderr or "parse" in result.stderr.lower()
def test_discover_json_output_schema(fake_home):
_make_project(fake_home, "homelab")
_make_project(fake_home, "career")
_write_peers_toml(fake_home, textwrap.dedent("""\
[peers.velox]
host = "velox"
"""))
result = _run(["--json", "--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
payload = json.loads(result.stdout)
assert "local" in payload
assert "peers" in payload
assert isinstance(payload["local"], list)
assert isinstance(payload["peers"], list)
assert "homelab" in payload["local"]
assert "career" in payload["local"]
velox = next((p for p in payload["peers"] if p["name"] == "velox"), None)
assert velox is not None
# Reachability is a key — value depends on actual SSH state.
assert "reachable" in velox
def test_discover_peer_scope(fake_home):
_write_peers_toml(fake_home, textwrap.dedent("""\
[peers.velox]
host = "velox"
[peers.bastion]
host = "bastion.local"
"""))
result = _run(["--peer", "velox", "--no-cache", "--json"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
payload = json.loads(result.stdout)
peer_names = [p["name"] for p in payload["peers"]]
assert "velox" in peer_names
assert "bastion" not in peer_names
def test_discover_unreachable_peer_marked(fake_home):
"""A peer with a definitely-unreachable host gets reachable=False."""
_write_peers_toml(fake_home, textwrap.dedent("""\
[peers.bogus]
host = "definitely-not-a-real-host.invalid"
ssh_user = "nobody"
"""))
result = _run(["--no-cache", "--json"], env={**os.environ, "HOME": str(fake_home)}, )
assert result.returncode == 0
payload = json.loads(result.stdout)
bogus = next((p for p in payload["peers"] if p["name"] == "bogus"), None)
assert bogus is not None
assert bogus["reachable"] is False
def test_discover_cache_hit_within_window(fake_home):
"""Second invocation within 5 min reads cache (skip the SSH probe)."""
_make_project(fake_home, "homelab")
# First call populates cache.
result1 = _run(["--json"], env={**os.environ, "HOME": str(fake_home)})
assert result1.returncode == 0
cache = fake_home / ".cache" / "cross-agent-comms" / "discovery.json"
assert cache.exists()
# Tamper with the cache to a marker only the cache path can produce.
payload = json.loads(cache.read_text())
payload["_test_marker"] = True
cache.write_text(json.dumps(payload))
# Second call (no --no-cache) should return the tampered payload.
result2 = _run(["--json"], env={**os.environ, "HOME": str(fake_home)})
assert result2.returncode == 0
payload2 = json.loads(result2.stdout)
assert payload2.get("_test_marker") is True
def test_discover_no_cache_flag_bypasses(fake_home):
"""--no-cache ignores even a fresh cache."""
_make_project(fake_home, "homelab")
cache_dir = fake_home / ".cache" / "cross-agent-comms"
cache_dir.mkdir(parents=True)
cache_dir.joinpath("discovery.json").write_text(json.dumps({
"_test_marker": True, "local": [], "peers": []
}))
result = _run(["--no-cache", "--json"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0
payload = json.loads(result.stdout)
# Cache marker should NOT appear in fresh result.
assert payload.get("_test_marker") is None or payload.get("_test_marker") is False
assert "homelab" in payload["local"]
def test_discover_halt_shows_banner(fake_home):
halt = fake_home / ".config" / "cross-agent-comms" / "HALT"
halt.parent.mkdir(parents=True)
halt.write_text("halted")
_make_project(fake_home, "homelab")
result = _run(["--no-cache"], env={**os.environ, "HOME": str(fake_home)})
assert result.returncode == 0 # discover continues to print under HALT
assert "HALT" in result.stdout
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