[Resolved]Newb needs a primer in property handling w/Groovy

First example:
switch

testRunner.testCase.getPropertyCount()

to

testRunner.testCase.testSteps["properties"].getPropertyCount()

In your example, you were counting the testCase properties, i.e. the properties on the testCase level, instead of the properties on testStep level.

Second example:
If you want to set the value of the property "randomValue" (from testStep "properties") to a random value, you should do the following:

testRunner.testCase.testSteps["Properties"].setPropertyValue("randomValue", (100000000 + (int)(Math.random()*900000000)).toString());