def test_run():
model = LPyModel(code=code_run())
assert model is not None
assert model.outputs == []
result = model()
true_result = "_(0.01)-(90)F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)+F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)+F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)"
assert str(model.outputs) == true_result
assert str(result) == true_result
result = model("_(0.01)-(90)F(1)", 0)
assert result == "_(0.01)-(90)F(1)"
result = model(N=0)
assert result == "_(0.01)-(90)F(1)"
true_result2 = "F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)+F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)+F(0.111111111111)+F(0.111111111111)--F(0.111111111111)+F(0.111111111111)"
result = model.run("F(1)")
assert str(result) == true_result2
result = model(N=0, lstring="F(1)")
assert result == "F(1)"
result = model(lstring="F(5)", N=0)
assert result == "F(5)"
