Reinstate the remaining continuum tests

tardis/montecarlo/tests/test_montecarlo.py

@@ -96,6 +96,41 @@ def fin():
     return compare_data
 
 
+@pytest.fixture(scope="function")
+def expected_ff_emissivity(continuum_compare_data):
+    emissivities = continuum_compare_data["ff_emissivity"]
+
+    def ff_emissivity(t_electron):
+        emissivity = emissivities[t_electron]
+        nu_bins = emissivity["nu_bins"].values
+        emissivity_value = emissivity["emissivity"].dropna().values
+
+        return nu_bins, emissivity_value
+
+    return ff_emissivity
+
+
+@pytest.fixture(scope="module")
+def ion_edges():
+    return [
+        {
+            "nu": [4.0e14, 4.1e14, 4.2e14, 4.3e14],
+            "x_sect": [1.0, 0.9, 0.8, 0.7],
+            "no_of_points": 4,
+        },
+        {
+            "nu": [3.0e14, 3.1e14, 3.2e14, 3.3e14, 3.4e14],
+            "x_sect": [1.0, 0.9, 0.8, 0.7, 0.6],
+            "no_of_points": 5,
+        },
+        {
+            "nu": [2.8e14, 3.0e14, 3.2e14, 3.4e14],
+            "x_sect": [2.0, 1.8, 1.6, 1.4],
+            "no_of_points": 4,
+        },
+    ]
+
+
 """
 Important Tests:
 ----------------