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LibTest: Add the RandomnessSource abstraction

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This will be a foundational part of bootstrapping generators: this is
the way they'll get prerecorded values from / record random values into
RandomRuns. (Generators don't get in contact with RandomRuns
themselves, they just interact with the RandomnessSource.)
This commit is contained in:
Martin Janiczek 2023-10-24 00:35:15 +02:00 • committed by Andrew Kaster
parent d4e4189a34
commit 7e5a3650fe
5 changed files with 91 additions and 0 deletions
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8
Userland/Libraries/LibTest/TestSuite.h
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@ -12,6 +12,7 @@
#include <AK/DeprecatedString.h>
#include <AK/Function.h>
#include <AK/Vector.h>
#include <LibTest/Randomized/RandomnessSource.h>
#include <LibTest/TestCase.h>
#include <LibTest/TestResult.h>
@ -45,6 +46,12 @@ public:
void set_current_test_result(TestResult result) { m_current_test_result = result; }
void set_suite_setup(Function<void()> setup) { m_setup = move(setup); }
// The RandomnessSource is where generators record / replay random data
// from. Initially a live "truly random" RandomnessSource is used, and when
// a failure is found, a set of hardcoded RandomnessSources is used during
// shrinking.
void set_randomness_source(Randomized::RandomnessSource source) { m_randomness_source = move(source); }
Randomized::RandomnessSource& randomness_source() { return m_randomness_source; }
private:
static TestSuite* s_global;
@ -55,6 +62,7 @@ private:
u64 m_benchmark_repetitions = 1;
Function<void()> m_setup;
TestResult m_current_test_result = TestResult::NotRun;
Randomized::RandomnessSource m_randomness_source = Randomized::RandomnessSource::live();
};
}