schrodinger.seam.testing.stateful module

Hypothesis Stateful tests for Beam pipelines using random core transforms. Useful for stress testing the SeamRunner with a large variety of pipelines.

Can be used in two ways.

1. Run as a standalone script:

   $SCHRODINGER/run python3 -m schrodinger.seam.testing.stateful --max-examples 1000 --stateful-step-count 10
   

2. Decorate a class with the StatefulBeamPipelineMachineTestCase decorator:

   @StatefulBeamPipelineMachineTestCase
   class TestSeamRunnerStateful:
       pass
   

class schrodinger.seam.testing.stateful.StatefulBeamPipelineMachine

Bases: hypothesis.stateful.RuleBasedStateMachine

Stateful test that builds up a Beam pipeline and then runs it with Seam at teardown.

Currently uses only numeric pcollections to keep the logic simple.

pcolls = Bundle(name='pcolls')

__init__()

runPipeline()

teardown()

Called after a run has finished executing to clean up any necessary state.

Does nothing by default.

applyCreate(new_elements: List[int])

applySideInput(pcoll: apache_beam.pvalue.PCollection)

applyTop(pcoll: apache_beam.pvalue.PCollection)

applySample(pcoll: apache_beam.pvalue.PCollection)

filterAll(pcoll: apache_beam.pvalue.PCollection)

applyReshuffle(pcoll: apache_beam.pvalue.PCollection)

applyDistinct(pcoll: apache_beam.pvalue.PCollection)

applyFlatten(pcolls: List[apache_beam.pvalue.PCollection])

applyMap(pcoll: apache_beam.pvalue.PCollection)

applyFlatMap(pcoll: apache_beam.pvalue.PCollection)

applyCount(pcoll: apache_beam.pvalue.PCollection)

applySum(pcoll: apache_beam.pvalue.PCollection)

applyGBK(pcoll: apache_beam.pvalue.PCollection)

TestCase

alias of hypothesis.stateful.StatefulBeamPipelineMachine.TestCase

bundle(name)

check_invariants()

classmethod initialize_rules()

classmethod invariants()

classmethod rules()

schrodinger.seam.testing.stateful.StatefulBeamPipelineMachineTestCase(hypothesis_settings: Optional[hypothesis.settings] = None)

Decorator to turn a class into a StatefulBeamPipelineMachine test case.

Example usage:

@StatefulBeamPipelineMachineTestCase
class TestSeamRunnerStateful:
    pass