fix(ci): update test_plot fixture and shorten long test names for E501

- test_plot.py: add 13 new CausalImpactResults fields to
  _make_results_with_index() fixture
- test_summary.py: shorten test method name to fix E501
- test_analysis.py: shorten two test method names to fix E501

Author: YuminosukeSato

tests/test_analysis.py

@@ -107,6 +107,54 @@ def test_relative_effect_percentage(self):
         # Relative effect ≈ 2.0/10.0 = 20%
         assert abs(result.relative_effect_mean - 0.2) < 0.1
 
+    def test_summary_stats_use_posterior_sample_aggregates(self):
+        """summary行はposterior sample集約値(mean/sd/CI)を保持する."""
+        y_post = np.array([10.0, 10.0])
+        predictions = np.array(
+            [
+                [8.0, 8.0],
+                [10.0, 6.0],
+                [11.0, 7.0],
+            ]
+        )
+
+        result = CausalAnalysis.compute_effects(
+            y_post=y_post,
+            predictions=predictions,
+            alpha=0.0,
+        )
+
+        assert np.array_equal(result.actual, y_post)
+        assert np.allclose(result.predictions_sd, np.std(predictions, axis=0, ddof=1))
+        assert result.average_prediction_sd == np.sqrt(1.0 / 3.0)
+        assert result.average_prediction_lower == 8.0
+        assert result.average_prediction_upper == 9.0
+        assert result.cumulative_prediction_sd == np.sqrt(4.0 / 3.0)
+        assert result.cumulative_prediction_lower == 16.0
+        assert result.cumulative_prediction_upper == 18.0
+        assert result.average_effect_sd == np.sqrt(1.0 / 3.0)
+        assert result.cumulative_effect_sd == np.sqrt(4.0 / 3.0)
+        assert result.relative_effect_lower == 1.0 / 9.0
+        assert result.relative_effect_upper == 0.25
+
+    def test_single_sample_degenerates_sd_to_zero(self):
+        """posterior sampleが1本ならs.d.はNaNではなく0に潰す."""
+        y_post = np.array([10.0, 12.0, 14.0])
+        predictions = np.array([[9.0, 11.0, 13.0]])
+
+        result = CausalAnalysis.compute_effects(
+            y_post=y_post,
+            predictions=predictions,
+            alpha=0.05,
+        )
+
+        assert np.array_equal(result.predictions_sd, np.zeros(3))
+        assert result.average_prediction_sd == 0.0
+        assert result.cumulative_prediction_sd == 0.0
+        assert result.average_effect_sd == 0.0
+        assert result.cumulative_effect_sd == 0.0
+        assert result.relative_effect_sd == 0.0
+
 
 class TestPointwiseCI:
     """各時点CI（R実装一致）テスト."""

tests/test_plot.py

@@ -16,21 +16,34 @@ def _make_results_with_index():
     y = np.random.default_rng(42).normal(10, 1, t_total)
     time_index = pd.date_range("2020-01-01", periods=t_total, freq="D")
     results = CausalImpactResults(
+        actual=np.full(t_post, 12.0),
         point_effects=np.full(t_post, 2.0),
         point_effect_lower=np.full(t_post, 1.5),
         point_effect_upper=np.full(t_post, 2.5),
         ci_lower=1.0,
         ci_upper=3.0,
         point_effect_mean=2.0,
+        average_effect_sd=0.2,
         cumulative_effect=np.cumsum(np.full(t_post, 2.0)),
         cumulative_effect_lower=np.cumsum(np.full(t_post, 1.5)),
         cumulative_effect_upper=np.cumsum(np.full(t_post, 2.5)),
         cumulative_effect_total=60.0,
+        cumulative_effect_sd=6.0,
         relative_effect_mean=0.2,
+        relative_effect_sd=0.02,
+        relative_effect_lower=0.1,
+        relative_effect_upper=0.3,
         p_value=0.01,
         predictions_mean=np.full(t_post, 10.0),
+        predictions_sd=np.full(t_post, 0.5),
         predictions_lower=np.full(t_post, 9.0),
         predictions_upper=np.full(t_post, 11.0),
+        average_prediction_sd=0.5,
+        average_prediction_lower=9.0,
+        average_prediction_upper=11.0,
+        cumulative_prediction_sd=15.0,
+        cumulative_prediction_lower=270.0,
+        cumulative_prediction_upper=330.0,
     )
     return results, y, time_index, t_pre
 

tests/test_summary.py

@@ -50,10 +50,8 @@ def test_summary_default_format(self):
         assert "Cumulative" in text
         assert "2.0" in text or "2.00" in text
 
-    def test_summary_includes_r_style_actual_prediction_and_effect_sections_because_placeholder_rows_hide_valid_results(
-        self,
-    ):
-        """R互換の summary では Actual/Prediction/Absolute/Relative の各行を欠かさない."""
+    def test_summary_includes_r_style_sections(self):
+        """R互換summary: Actual/Prediction/Absolute/Relativeの各行を表示."""
         result = _make_results(effect=2.0, p_value=0.01)
 
         text = SummaryFormatter.summary(result, digits=2)