ConstantWithTestBool is like ConstantWithTestValue except it returns the non-default value half of the time (if running a metamorphic build).

ConstantWithTestBoolWithoutLogging is like ConstantWithTestBool except it does not log the value.

ConstantWithTestChoice is like ConstantWithTestValue except it returns a random choice (equally weighted) of the given values.

ConstantWithTestRange is like ConstantWithTestValue except instead of returning a single metamorphic test value, it returns a random test value in the semi-open range [min, max).

ConstantWithTestValue should be used to initialize "magic constants" that should be varied during test scenarios to check for bugs at boundary conditions.

IsMetamorphicBuild returns whether this build is metamorphic.

DisableMetamorphicEnvVar can be used to disable metamorphic tests for sub-processes.

MetamorphicOverridesEnvVar can be used to set metamorphic variables to specific values.