AnimationTest : use assert[Pre|Post]Conditions idiom for undo/redo tests
AnimationTest : use assert[Pre|Post]Conditions idiom for undo/redo tests

hradec/gaffer,hradec/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,hradec/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,hradec/gaffer,hradec/gaffer