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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | 6x 6x 6x 6x 6x 90x 21483x 21483x 940079x 21483x 21483x 7292x 7292x 7182x 7169x 5770x 6069x 6069x 5960x 5960x 3043x 2813x 2558x 1121x 1121x 1121x 1121x 343x 291x 132x 5880x 5880x 3152x 3152x 1702x 1702x 418x 418x 408x 1284x 1284x | import {DelOp, InsObjOp, InsStrOp, InsBinOp, InsArrOp} from '../../../json-crdt-patch/operations';
import {RandomJson} from '@jsonjoy.com/util/lib/json-random';
import type {JsonNode, ObjNode, ArrNode, BinNode, StrNode} from '../../nodes';
import type {Model} from '../../model/Model';
import {Fuzzer} from '@jsonjoy.com/util/lib/Fuzzer';
import type {FuzzerOptions} from './types';
type StringOp = typeof InsStrOp | typeof DelOp;
type BinaryOp = typeof InsBinOp | typeof DelOp;
type ArrayOp = typeof InsArrOp | typeof DelOp;
type ObjectOp = typeof InsObjOp | typeof DelOp;
const commonKeys = ['a', 'op', 'test', 'name', '', '__proto__'];
/**
* This class picks random nodes from a model and picks a random
* operation to apply to that node.
*/
export class Picker {
constructor(public opts: FuzzerOptions) {}
public pickNode(model: Model): JsonNode | null {
const nodes: JsonNode[] = [];
const index = model.index;
// biome-ignore lint: index is not iterable
index.forEach(({v: node}) => nodes.push(node));
Iif (!nodes.length) return null;
return Fuzzer.pick(nodes);
}
public pickStringOperation(node: StrNode): StringOp {
const length = node.length();
if (!length) return InsStrOp;
if (length >= this.opts.maxStringLength) return DelOp;
if (Math.random() < this.opts.stringDeleteProbability) return DelOp;
return InsStrOp;
}
public pickBinaryOperation(node: BinNode): BinaryOp {
const length = node.length();
if (!length) return InsBinOp;
Iif (length >= this.opts.maxStringLength) return DelOp;
if (Math.random() < this.opts.binaryDeleteProbability) return DelOp;
return InsBinOp;
}
public pickObjectOperation(node: ObjNode): [key: string, opcode: ObjectOp] {
if (!node.keys.size) return [this.generateObjectKey(), InsObjOp];
if (Math.random() > 0.45) return [this.generateObjectKey(), InsObjOp];
const keys = [...node.keys.keys()];
Iif (!keys.length) return [this.generateObjectKey(), InsObjOp];
const key = Fuzzer.pick(keys);
return [key, DelOp];
}
public pickArrayOperation(node: ArrNode): ArrayOp {
if (!node.length()) return InsArrOp;
if (Math.random() > 0.45) return InsArrOp;
else return DelOp;
}
public generateSubstring(): string {
const length = Math.floor(Math.random() * this.opts.maxSubstringLength) + 1;
return RandomJson.genString(length);
}
public generateBinaryData(): Uint8Array {
const length = Math.floor(Math.random() * this.opts.maxBinaryChunkLength) + 1;
return RandomJson.genBinary(length);
}
public generateObjectKey(): string {
const useCommonKey = Math.random() < 0.25;
if (useCommonKey) {
const str = Fuzzer.pick(commonKeys);
if (this.opts.noProtoString && str === '__proto__') return this.generateObjectKey();
return str;
} else {
const length = Math.floor(Math.random() * 20) + 1;
return RandomJson.genString(length);
}
}
}
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