Updated and extended Regression Testing frameworks (Gsoc 2020)

This revision contains the following changes-

  - Updated the existing testing framework for Modifiers for Regression
  Testing.
  - Tests for Physics modifiers and remaining Generate and Deform modifiers are added.
  - The existing `ModifierSpec` is updated with backward compatibility to support Physics Modifiers.
  - Now there is support for frame number and giving nested parameters for attributes.
  - Some Deform modifiers required Object Operators, e.g. "Bind" in Mesh Deform, so a new class was added to support that functionality.
  - A separate class for holding Particles System, they are tested by converting all the particles to mesh and joining it to the mesh they were added.
  - Updated the format to add tests for Bevel, Boolean and Operators as
  well.

Reviewed By: zazizizou, mont29, campbellbarton

Differential Revision: https://developer.blender.org/D8507

tests/python/physics_softbody.py

@@ -24,26 +24,31 @@ import sys
 import bpy
 
 sys.path.append(os.path.dirname(os.path.realpath(__file__)))
-from modules.mesh_test import ModifierTest, PhysicsSpec
+from modules.mesh_test import RunTest, ModifierSpec, MeshTest
 
 
 def main():
     test = [
-      ["testSoftBody", "expectedSoftBody",
-       [PhysicsSpec('Softbody', 'SOFT_BODY', {'use_goal': False, 'bend': 8, 'pull': 0.8, 'push': 0.8}, 45)]],
+
+        MeshTest("SoftBodySimple", "testSoftBody", "expectedSoftBody",
+                 [ModifierSpec('Softbody', 'SOFT_BODY',
+                               {'settings': {'use_goal': False, 'bend': 8, 'pull': 0.8, 'push': 0.8}},
+                               45)]),
     ]
-    softBody_test = ModifierTest(test)
+    soft_body_test = RunTest(test)
 
     command = list(sys.argv)
     for i, cmd in enumerate(command):
         if cmd == "--run-all-tests":
-            softBody_test.apply_modifiers = True
-            softBody_test.run_all_tests()
+            soft_body_test.apply_modifiers = True
+            soft_body_test.do_compare = True
+            soft_body_test.run_all_tests()
             break
         elif cmd == "--run-test":
-            softBody_test.apply_modifiers = False
-            index = int(command[i + 1])
-            softBody_test.run_test(index)
+            soft_body_test.apply_modifiers = False
+            soft_body_test.do_compare = False
+            name = command[i + 1]
+            soft_body_test.run_test(name)
             break