Add unit tests; update documentation.

Author: dbookstaber

py_ballisticcalc.exts/py_ballisticcalc_exts/base_engine.pyx

@@ -249,7 +249,7 @@ cdef class CythonizedBaseIntegrationEngine:
         shot_props_ptr[0].barrel_elevation = angle_rad
         __res = self._integrate(shot_props_ptr, target_x_ft, target_x_ft, <double>0.0, <int>TrajFlag_t.NONE)
         trajectory = <CBaseTrajSeq>__res[0]
-        # If trajectory is too short for quadratic interpolation, treat as unreachable
+        # If trajectory is too short for cubic interpolation, treat as unreachable
         n = <Py_ssize_t>len(trajectory)
         if n < <Py_ssize_t>3:
             return <double>9e9

py_ballisticcalc.exts/py_ballisticcalc_exts/euler_engine.pyx

@@ -124,8 +124,8 @@ cdef class CythonizedEulerIntegrationEngine(CythonizedBaseIntegrationEngine):
             &density_ratio,
             &mach
         )
-        
-        # Quadratic interpolation requires 3 points, so we will need at least 3 steps
+
+        # Cubic interpolation requires 3 points, so we will need at least 3 steps
         while (range_vector.x <= range_limit_ft) or integration_step_count < 3:
             integration_step_count += 1
 

py_ballisticcalc.exts/py_ballisticcalc_exts/rk4_engine.pyx

@@ -124,7 +124,7 @@ cdef class CythonizedRK4IntegrationEngine(CythonizedBaseIntegrationEngine):
         traj_seq = CBaseTrajSeq()
 
         # Trajectory Loop
-        # Quadratic interpolation requires 3 points, so we will need at least 3 steps
+        # Cubic interpolation requires 3 points, so we will need at least 3 steps
         while (range_vector.x <= range_limit_ft) or integration_step_count < 3:
             integration_step_count += 1
 

py_ballisticcalc/drag_tables.py

@@ -810,18 +810,17 @@ def get_drag_tables_names() -> List[str]:
         >>> 'TableG1' in tables
         True
     """
-    return [f"TableG{n}" for n in (1, 7, 2, 5, 6, 8, 'I', 'S', 'RA4')]
+    names: List[str] = []
+    for attr_name, value in globals().items():
+        if not attr_name.startswith('Table'):
+            continue
+        if isinstance(value, list) and value and isinstance(value[0], dict):
+            first = value[0]
+            if 'Mach' in first and 'CD' in first:
+                names.append(attr_name)
+    names.sort()
+    return names
 
 
 __all__ = ['get_drag_tables_names', 'DragTablePointDictType']
-__all__ += [
-    'TableG1',
-    'TableG7',
-    'TableG2',
-    'TableG5',
-    'TableG6',
-    'TableG8',
-    'TableGI',
-    'TableGS',
-    'TableRA4'
-]
+__all__ += get_drag_tables_names()