"""Tests for solver factory and interface."""
import pytest
from chuk_mcp_solver.solver import ORToolsSolver, SolverProvider, get_solver
def test_get_solver_ortools():
"""Test get_solver returns OR-Tools solver."""
solver = get_solver("ortools")
assert isinstance(solver, ORToolsSolver)
assert isinstance(solver, SolverProvider)
def test_get_solver_unknown_type():
"""Test that unknown solver type raises ValueError."""
with pytest.raises(ValueError, match="Unknown solver type: nonexistent"):
get_solver("nonexistent")
def test_ortools_solver_instance():
"""Test ORToolsSolver can be instantiated directly."""
solver = ORToolsSolver()
assert isinstance(solver, SolverProvider)
assert hasattr(solver, "solve_constraint_model")
