fix: update tests for IV summary implementation

Author: anevolbap

causalpy/experiments/instrumental_variable.py

@@ -298,7 +298,7 @@ def summary(self, round_to: int | None = 2) -> None:
             print(f"    {name: <20}  {round_num(val, round_to)}")
 
         print("\nBayesian coefficients:")
-        posterior = self.idata.posterior
+        posterior = self.idata.posterior  # type: ignore[union-attr]
         for var, dim, labels, stage in [
             ("beta_t", "instruments", self.labels_instruments, "Instrument stage"),
             ("beta_z", "covariates", self.labels, "Outcome stage"),

causalpy/tests/test_instrumental_variable.py

@@ -399,7 +399,7 @@ def test_iv_coords_set(iv_data, sample_kwargs):
 # =============================================================================
 
 
-@pytest.mark.parametrize("method", ["plot", "summary", "effect_summary"])
+@pytest.mark.parametrize("method", ["plot", "effect_summary"])
 def test_iv_not_implemented_methods(iv_data, sample_kwargs, method):
     """Test that unimplemented methods raise NotImplementedError."""
     result = cp.InstrumentalVariable(