tests: add convolution test with finer grid

Author: rneher

packages/treetime-convolution/src/testing/test_suites/gaussian_exponential.rs

@@ -39,10 +39,22 @@ impl TestSuite for GaussianExponentialTestSuite {
       analytical_caution: "none".to_owned(),
       slowness: 0.0,
       a_f: 0.5,
-      input_grid_domain: (-1.0, 40.0),
+      input_grid_domain: (-5.0, 40.0),
       input_grid_n_points: 101,
       output_grid_domain: (-5.0, 25.0),
       output_grid_n_points: 101,
+    },
+    GaussianExponentialTestCase {
+      name: "python_notebook_case_fine".to_owned(),
+      description: "Parameters from conv_gauss_exp.ipynb: a_f=0.5".to_owned(),
+      stress_type: "reference implementation validation".to_owned(),
+      analytical_caution: "none".to_owned(),
+      slowness: 0.0,
+      a_f: 0.5,
+      input_grid_domain: (-5.0, 40.0),
+      input_grid_n_points: 501,
+      output_grid_domain: (-5.0, 25.0),
+      output_grid_n_points: 101,
     }]
   }
 }