Missing tests in composite context

[Randle Taylor]

Currently if a test does not have a value entered for it, it is not included in the composite calculations context.

All tests, whether they have values entered for them or not should be included in the composite calculation context. This makes it easier to do calculations which have "optional" values.

For example if you want to average over 1 or more values you currently have to do something like

readings = []
try:
    readings.append(elekta_6mv_r1)
except NameError:
    pass

try:
    readings.append(elekta_6mv_r2)
except NameError:
    pass

try:
    readings.append(elekta_6mv_r3)
except NameError:
    pass

result = sum(readings)/len(readings)

If all the tests were available in the namespace than you could just do:

readings = [x for x in (elekta_6mv_r1, elekta_6mv_r2, elekta_6mv_r3) if x]
result = sum(readings)/len(readings)

[Randle Taylor]

fixed in dev.