fuzz_dart

Description:

fuzz dart

Fuzz Testing in Dart #
What is fuzz test. #


Fuzz testing is a way detect unexcepted inputs for functions.


Create a folder for fuzz testing.


And put your files under this folder.


import 'package:fuzz_dart/fuzz_dart.dart' as fuzz_dart;
void main(List<String> arguments) {

}
copied to clipboard
Example. #

This is greeter function.
We have a control here.
But we don't have any constraint for substring. If name variable length less than 10 this function will throw error.
So fuzz testing finds bug like this. And generate html file.
Run this file dart run {FILENAME}

void main(List<String> arguments) {
greeter(String name, String lastname) {
if (name.length > 13) {
throw Exception('name is so long');
}
name.substring(10)
return "hello $name $lastname";
}

fuzz_dart.Fuzzer greeterFunctionFuzzer = fuzz_dart.Fuzzer(
type: [fuzz_dart.AcceptedTypes.string],
iterateCount: 12,
fileName: 'greeter-fuzzer');
greeterFunctionFuzzer.iterate(greeter, 'greeting!',
description: 'Returns name and lastname');
}

copied to clipboard

Output

Exception: name is so long - Arguments: [ovfpdf|qelzyavu`, m}oqc~wgo]
RangeError (start): Invalid value: Not in inclusive range 0..2: 20 - Arguments: [g, du~klr]
Exception: name is so long - Arguments: [w{kpa}tdy}r~slrnvstp, s|_qr|rtsjzrz~vid}|dlvyvyi_~d~tbooj_|lvmq]
Exception: name is so long - Arguments: [ik|ca|k_gdilltbyyl|osooyzdirjza{{y, zuoo~u}woxsx|kqznyucvadwnpnmp_kp]
RangeError (start): Invalid value: Only valid value is 0: 20 - Arguments: [, fypr|cjnk|irec|vepfpypgs~rdjeltr_y{}io|{ucre`~d]
Exception: name is so long - Arguments: [vhedjuscuoervjauram`y}i{q{mxigw, sxypbkwjrqszjlszoy}siiswclhqdrpylwiprk]
Exception: name is so long - Arguments: [~ol{`butmq~how, jkfykl{i`spvoqz~qjkqcm`]
Exception: name is so long - Arguments: [~nmgrmmoujpqyssvgz{hjtm~_w, zqx{|tkhdpg]
Exception: name is so long - Arguments: [ylne}rmrwrear_fv~g`z{{dz_ecsefk|rot_bvfqa, ejwu]
copied to clipboard
Example 2 #

Make sure your parameter order is correct in type property.

import 'package:fuzz_dart/fuzz_dart.dart' as fuzz_dart;

String calculate(int num1, int num2) {
if (num1 > 2000) {
throw Exception('num1 should lower than 2000');
}
return "result of two number is ${num1 + num2}";
}
String calculate2(int num1, int num2, int num3) {
return "result of three number is ${num1 + num2 + num3}";
}

fuzz_dart.Fuzzer greeterFunctionFuzzer = fuzz_dart.Fuzzer(
type: [fuzz_dart.AcceptedTypes.string],
iterateCount: 12,
fileName: 'greeter-fuzzer');

fuzz_dart.Fuzzer intFuzzer = fuzz_dart.Fuzzer(
type: [fuzz_dart.AcceptedTypes.integer],
iterateCount: 3,
fileName: 'fuzzer 1');

fuzz_dart.Fuzzer intFuzzer2 = fuzz_dart.Fuzzer(
type: [fuzz_dart.AcceptedTypes.integer],
iterateCount: 2,
fileName: 'fuzzer-2');

intFuzzer2.iterate(calculate, 'calculator 1');
intFuzzer.iterate(calculate2, 'calculator 2');
greeterFunctionFuzzer.iterate(greeter, 'greeting!',
description: 'Returns name and lastname');
listFuzzer.iterate(arrs, 'list fuzzer fun');
cityFuzzer.iterate(city, 'city', description: 'Returns current index');

copied to clipboard
HTML OUTPUTS #