assert error == '', "The feature {0} is in error: {1}".format(name, error)
# raise an error if the the feature is not valid (without error message)
assert aFactory.validate(feature), "The feature {0} is in error.".format(name)
+
+def checkMiddlePoint(theShape, theX, theY, theZ, theTolerance = 1.e-7):
+ """ Check coordinates of middle point of the given shape.
+ :param theShape the shape to check
+ :param theX, theY, theZ the expected coordinates
+ :param theTolerance comparison tolerance
+ """
+ assert(theShape is not None)
+ midPoint = theShape.middlePoint()
+ isEqual = math.fabs(midPoint.x() - theX) < theTolerance and math.fabs(midPoint.y() - theY) < theTolerance and math.fabs(midPoint.z() - theZ) < theTolerance
+ assert(isEqual), "Middle point: actual ({}, {}, {}) != expected ({}, {}, {})".format(midPoint.x(), midPoint.y(), midPoint.z(), theX, theY, theZ)
