test

Documentation

Overview

Package test provides components or functions to help test and fuzz gnark circuits.

Index

• Constants
• Variables
• func IsSolved(circuit, witness frontend.Circuit, curveID ecc.ID, b backend.ID, ...) (err error)
• func NewKZGSRS(ccs frontend.CompiledConstraintSystem) (kzg.SRS, error)
• type Assert
  • func NewAssert(t *testing.T) *Assert
  • func (assert *Assert) Fuzz(circuit frontend.Circuit, fuzzCount int, opts ...TestingOption)
  • func (assert *Assert) GetCounters(circuit frontend.Circuit, opts ...TestingOption) []compiled.Counter
  • func (assert *Assert) Log(v ...interface{})
  • func (assert *Assert) ProverFailed(circuit frontend.Circuit, invalidAssignment frontend.Circuit, ...)
  • func (assert *Assert) ProverSucceeded(circuit frontend.Circuit, validAssignment frontend.Circuit, ...)
  • func (assert *Assert) Run(fn func(assert *Assert), descs ...string)
  • func (assert *Assert) SolvingFailed(circuit frontend.Circuit, invalidWitness frontend.Circuit, ...)
  • func (assert *Assert) SolvingSucceeded(circuit frontend.Circuit, validWitness frontend.Circuit, opts ...TestingOption)
• type TestingOption
  • func NoSerialization() TestingOption
  • func WithBackends(b backend.ID, backends ...backend.ID) TestingOption
  • func WithCompileOpts(compileOpts ...frontend.CompileOption) TestingOption
  • func WithCurves(c ecc.ID, curves ...ecc.ID) TestingOption
  • func WithProverOpts(proverOpts ...backend.ProverOption) TestingOption

Constants

const (
	JSON marshaller = iota
	Binary
)

Variables

var (
	ErrCompilationNotDeterministic = errors.New("compilation is not deterministic")
	ErrInvalidWitnessSolvedCS      = errors.New("invalid witness solved the constraint system")
	ErrInvalidWitnessVerified      = errors.New("invalid witness resulted in a valid proof")
)

Functions

func IsSolved

func IsSolved(circuit, witness frontend.Circuit, curveID ecc.ID, b backend.ID, opts ...backend.ProverOption) (err error)

IsSolved returns an error if the test execution engine failed to execute the given circuit with provided witness as input.

The test execution engine implements frontend.API using big.Int operations.

This is an experimental feature.

func NewKZGSRS

func NewKZGSRS(ccs frontend.CompiledConstraintSystem) (kzg.SRS, error)

NewKZGSRS uses ccs nb variables and nb constraints to initialize a kzg srs for sizes < 2¹⁵, returns a pre-computed cached SRS

/!\ warning /!\: this method is here for convenience only: in production, a SRS generated through MPC should be used.

Types

type Assert

type Assert struct {
	*require.Assertions
	// contains filtered or unexported fields
}

Assert is a helper to test circuits

func NewAssert

func NewAssert(t *testing.T) *Assert

NewAssert returns an Assert helper embedding a testify/require object for convenience

The Assert object caches the compiled circuit:

the first call to assert.ProverSucceeded/Failed will compile the circuit for n curves, m backends and subsequent calls will re-use the result of the compilation, if available.

func (*Assert) Fuzz

func (assert *Assert) Fuzz(circuit frontend.Circuit, fuzzCount int, opts ...TestingOption)

Fuzz fuzzes the given circuit by instantiating "randomized" witnesses and cross checking execution result between constraint system solver and big.Int test execution engine

note: this is experimental and will be more tightly integrated with go1.18 built-in fuzzing

func (*Assert) GetCounters

func (assert *Assert) GetCounters(circuit frontend.Circuit, opts ...TestingOption) []compiled.Counter

GetCounters compiles (or fetch from the compiled circuit cache) the circuit with set backends and curves and returns measured counters

func (*Assert) Log

func (assert *Assert) Log(v ...interface{})

Log logs using the test instance logger.

func (*Assert) ProverFailed

func (assert *Assert) ProverFailed(circuit frontend.Circuit, invalidAssignment frontend.Circuit, opts ...TestingOption)

ProverSucceeded fails the test if any of the following step errored:

1. compiles the circuit (or fetch it from the cache) 2. using the test execution engine, executes the circuit with provided witness (must fail) 3. run Setup / Prove / Verify with the backend (must fail)

By default, this tests on all curves and proving schemes supported by gnark. See available TestingOption.

func (*Assert) ProverSucceeded

func (assert *Assert) ProverSucceeded(circuit frontend.Circuit, validAssignment frontend.Circuit, opts ...TestingOption)

ProverSucceeded fails the test if any of the following step errored:

1. compiles the circuit (or fetch it from the cache) 2. using the test execution engine, executes the circuit with provided witness 3. run Setup / Prove / Verify with the backend 4. if set, (de)serializes the witness and call ReadAndProve and ReadAndVerify on the backend

By default, this tests on all curves and proving schemes supported by gnark. See available TestingOption.

func (*Assert) Run

func (assert *Assert) Run(fn func(assert *Assert), descs ...string)

Run runs the test function fn as a subtest. The subtest is parametrized by the description strings descs.

func (*Assert) SolvingFailed

func (assert *Assert) SolvingFailed(circuit frontend.Circuit, invalidWitness frontend.Circuit, opts ...TestingOption)

func (*Assert) SolvingSucceeded

func (assert *Assert) SolvingSucceeded(circuit frontend.Circuit, validWitness frontend.Circuit, opts ...TestingOption)

type TestingOption

type TestingOption func(*testingConfig) error

TestingOption defines option for altering the behaviour of Assert methods. See the descriptions of functions returning instances of this type for particular options.

func NoSerialization

func NoSerialization() TestingOption

NoSerialization is a testing option which disables witness serialization tests in assertions.

func WithBackends

func WithBackends(b backend.ID, backends ...backend.ID) TestingOption

WithBackends is testing option which restricts the backends the assertions are run. When not given, runs on all implemented backends.

func WithCompileOpts

func WithCompileOpts(compileOpts ...frontend.CompileOption) TestingOption

WithCompileOpts is a testing option which uses the given compileOpts when calling frontend.Compile in assertions.

func WithCurves

func WithCurves(c ecc.ID, curves ...ecc.ID) TestingOption

WithCurves is a testing option which restricts the curves the assertions are run. When not given, runs on all implemented curves.

func WithProverOpts

func WithProverOpts(proverOpts ...backend.ProverOption) TestingOption

WithProverOpts is a testing option which uses the given proverOpts when calling backend.Prover, backend.ReadAndProve and backend.IsSolved methods in assertions.