Module `test_runner`

State and functions for running proptest tests.

You do not normally need to access things in this module directly except when implementing new low-level strategies.

Structs

Config Configuration for how a proptest test should be run.
MapFailurePersistence Failure persistence option that loads and saves seeds in memory on the heap. This may be useful when accumulating test failures across multiple TestRunner instances for external reporting or batched persistence.
PersistedSeed Opaque struct representing a seed which can be persisted.
Reason The reason for why something, such as a generated value, was rejected.
ResultCacheKey A key used for the result cache.
TestRng Proptest's random number generator.
TestRunner State used when running a proptest test.

FileFailurePersistence Describes how failing test cases are persisted.
RngAlgorithm Identifies a particular RNG algorithm supported by proptest.
RngSeed The seed for the RNG, can either be random or specified as a u64.
TestCaseError Errors which can be returned from test cases to indicate non-successful completion.
TestError A failure state from running test cases for a single test.

FailurePersistence Provides external persistence for historical test failures by storing seeds.
ProptestResultExt Extension trait for Result<T, E> to provide additional functionality specifically for prop test cases.
ResultCache An object which can cache the outcomes of tests.

basic_result_cache A basic result cache.
contextualize_config Override the config fields from environment variables, if any are set. Without the std feature this function returns config unchanged.
noop_result_cache A result cache that does nothing.

INFO_LOG Verbose level 1 to show failures. In state machine tests this level is used to print transitions.